Portable Ultrasonic Flow Meter is a handheld ultrasonic flow meter. The clamp-on sensor is used to measure liquid flow in industrial pipelines.
The portable ultrasonic flowmeter ( Model: 3000H) uses a non-invasive sensor to measure liquid flow. The installation process is extremely simple. There is no need to destroy the pipeline during the measurement process and no need to stop production. The sensor is not in contact with the measured medium. Battery powered, small size, light weight and easy to carry. Realize the real sense of mobile flow measurement, online detection, is a real sense of portable ultrasonic flowmeter.
Other forms of application of ultrasonic flowmeter:
The externally clamped ultrasonic flowmeter can realize non-contact flow measurement. Even if it is a plug-in or internally attached ultrasonic flowmeter, the pressure loss is almost very low, and it is convenient and economical to measure flow.
The ultrasonic flowmeter can measure water, gas, oil and various media, and it has a wide range of applications.
The manufacturing cost of ultrasonic flowmeter has almost nothing to do with the caliber. The price is reasonable on the large diameter flow measuring stone. Comprehensive competitive advantage with easy installation and use
Portable ultrasonic flow meters can be used to measure flow in pipelines with different pipe diameters and different materials. Used as a standard table for online calibration, comparison or period verification.
Ultrasonic flowmeter has the convenience of inverse source based on two basic physical quantities of length and time. It can be expected that flow meters that surpass other principles will become flow standards or carriers of flow standards.
Ultrasonic flowmeter has extremely low power consumption and long battery power supply time. Advanced intelligent host is easy to carry out network wireless communication, and its application prospects are broader.
Open the top cover of the transmitter and you can see the wiring ports on the power board, from left to right, in order:
Downstream sensor interface (Down Stream), upstream sensor interface (Up Stream), power switch, 4-20mA output interface, charger port, specific wiring, please refer to the following figure:
Common faults and treatment in the use of ultrasonic flowmeter
Ultrasonic flowmeter is a non-contact instrument. It can not only measure the medium flow of large pipe diameter, but also measure the medium that is difficult to contact and observe. The measurement accuracy is very high, and it is rarely affected by various parameters of the test medium. In particular, it can solve the flow measurement problems of strong corrosive, vision, radioactivity and flammable and explosive media that other instruments cannot do.
Common faults and treatment in the use of ultrasonic flowmeter
Failure phenomenon: The instantaneous flowmeter fluctuates greatly. ⑴ Cause of failure: large fluctuations in signal strength; large fluctuations in the measured fluid itself. ⑵Processing method: adjust the probe position and increase the signal strength (maintain above 3%). Ensure the signal strength is stable. If the fluid fluctuates greatly, the position is not good. Re-select the points to ensure the working conditions of the first 10D and the 5D.
Failure phenomenon: Low signal of external clamp ultrasonic flowmeter. ⑴Cause of failure: The pipe diameter is too large or the pipe fouls seriously or the installation method is wrong. ⑵ Treatment method: Use plug-in probes for those with too large pipe diameter and serious scaling. Re-select the installation method.
Failure phenomenon: The signal of the plug-in probe decreases after a period of use. ⑴Cause of failure: The probe may be offset or the scale on the probe surface may be thick. ⑵ Treatment method: readjust the probe position. Clear the emitting surface of the probe.
Trouble phenomenon: No display when booting. ⑴Cause of failure: The power supply attribute does not correspond to the rated value of the instrument or the fuse is blown. ⑵ Treatment method: Check whether the power supply attribute corresponds to the rated value of the instrument. Whether the fuse is blown. If the above problems are not found, notify the factory professionals to deal with.
Trouble phenomenon: The instrument has only backlight and no character display after power on. ⑴Cause of failure: Generally, the program chip is missing. ⑵ Treatment method: notify the factory professionals to deal with.
Failure phenomenon: Ultrasonic flow meter cannot be used under strong interference on site. ⑴ The cause of the fault: The power supply has a large fluctuation range, or there are frequency converters or strong magnetic field interference or the grounding wire is incorrect. ⑵ Treatment method: Provide stable power supply to the instrument. Or install the meter away from the inverter and strong magnetic field interference. Or set the grounding wire standardly.
Sino-Inst, Manufacuturer for Portable Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of 1″~48″(25mm~1200mm). It can measure even liquids such as water, sea water, oil, and slurry.
Sino-Inst’s Portable Ultrasonic Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Insertion Flow Meter is widely used for flow measurement of large diameter pipes. Insertion Turbine Flow Meter is also called insertion type turbine flow meter.
Insertion Turbine Flow Meter is designed for accurate, cost-effective flow measurement of large pipes. Insertion Turbine Flow Meter utilizes an electronic turbine rotation sensing system and unique low-quality turbine design. It provides process flow measurement for steam, gas, and high-temperature liquid Reliable solution. Of course, according to different application environments, different versions of plug-in flow meters can be provided, such as fixed, adjustable, bidirectional, and high pressure.
SI- LWCB/Q SERIES Insertion Turbine Flowmeters for Liquids and Gas 4”-72” Pipe Diameters
LWCQ features
LWCB features
Strong anti-impurity ability. The tangential impeller can release suspended debris in the fluid at any time when it is rotating so that it will not be wound on the blades of the tangential impeller;
The structure and principle of the sensor and display instrument are very simple and intuitive. It is especially easy for users to master its use and maintenance technology;
Strong anti-electromagnetic interference and anti-vibration ability;
Strong anti-electromagnetic interference and anti-vibration ability;
The structure and principle of the sensor and display instrument are very simple and intuitive. It is especially easy for users to master its use and maintenance technology;
The sensor can be installed in the open air. The entire sensor can be submerged in water for a long time;
After replacing the impeller and bearing, the meter coefficient remains unchanged;
The flow range is wide and the lower limit flow rate is low.
Wide flow range. Low lower limit flow rate;
The metering error of the complete set of flowmeters to the total fluid is small.
The measurement error of the complete set of the flowmeter to the total fluid is small;
Almost no pressure loss. Save power and power consumption.
Almost no pressure loss. Save power and power consumption;
After replacing the impeller and bearing, the meter coefficient remains unchanged;
The sensor can be installed in the open air. The entire sensor can be submerged in water for a long time;
Sensors with shut-off valves. There is no need to cut off the flow during installation and removal;
Sensors with shut-off valves. There is no need to cut off the flow during installation and removal;
Horizontal, vertical, and inclined pipes can be used;
Horizontal, vertical, and inclined pipes can be used;
The purchase, installation, and maintenance costs of complete flowmeters are low.
The purchase of complete sets of flowmeters. Low installation and maintenance costs;
Specifications Of Turbine Insertion Flow Meter
Accuracy
±5% 、±2.5%
Insertion depth
When the inner diameter (DN) of the tested pipe is ≤1050mm, the insertion depth is: LWCQ: 0.5×DN-20mm LWCB: 0.5×DN
Nominal pressure
1.0 MPa
Measured liquid temperature
-20℃~120℃
Ambient temperature
-20 ℃~70 ℃
Distance from the sensor to display meter
Up to 1000m or more
Requirements on the length of straight pipe
The length of the upstream straight pipe section of the sensor should not be less than 20DN, and the length of the downstream straight pipe section should not be less than 7DN to ensure measurement accuracy. If the length of the straight pipe section cannot meet this requirement, the on-site calibration instrument coefficient K can be used after on-site calibration is carried out under the condition of on-site calibration.
Flow Range
Model
Measured inner diameter of pipe mm
Insert rod length mm
The flow range corresponding to the nominal diameter DN m3/h
Full flow range
Accuracy is ±2.5% of the flow range of the displayed value
Accuracy is the flow range of ±5% of the displayed value
LWCQ-100*
100
6-150
10-150
<10-6
LWCQ-150
150
13-200
20-200
<20-13
LWCQ-200
200
23-300
40-300
<40-23
LWCQ≤400*
100
906
6-150
10-150
<10-6
150
13-200
20-200
<20-13
200
23-300
40-300
<40-23
250
36-450
62-450
<62-36
300
52-650
90-650
<90-52
350
70-900
120-900
<120-70
400
92-1100
160-1100
<160-92
LWCQ≤800
500
1106
150-1800
250-1800
<250-150
600
220-2500
360-2500
<360-220
700
280-3500
450-3500
<450-280
800
380-4500
640-4500
<640-380
LWCQ>800*
900
1306
460-5800
800-5800
<800-460
1000
600-7000
990-7000
<990-600
1100
700-8500
1200-8500
<1200-700
Model
Measured inner diameter of pipe mm
Insert rod length mm
The flow range corresponding to the nominal diameter DN m3/h
Full flow range
Accuracy is ±2.5% of the flow range of the displayed value
Accuracy is the flow range of ±5% of the displayed value
LWCB-100*
100
3-150
5-150
<5-3
LWCB-150
150
7-200
10-200
<10-7
LWCB-200
200
12-300
20-300
<20-12
LWCB≤400*
100
900
3-150
5-150
<5-3
150
7-200
10-200
<10-7
200
12-300
20-300
<20-12
250
18-450
31-450
<31-18
300
26-650
45-650
<45-26
350
35-900
60-900
<60-35
400
46-1100
80-1100
<80-46
LWCB≤800
500
1100
75-1800
125-1800
<125-75
600
110-2500
180-2500
<180-110
700
140-3500
225-3500
<225-140
800
190-4500
320-4500
<320-190
LWCB>800*
900
1300
230-5800
400-5800
<400-230
1000
300-7000
495-7000
<495-300
1100
350-8500
600-8500
<600-350
Model
Description
LWC—
□
□
□
Impeller
Q
Tangential
B
Axial
Structure
≤or>
Indicates a shut-off valve
—
Indicates no shut-off valve
Diameter
（mm）
User pipe diameter
Model example Example 1: LWCQ-100, which means no stop valve, nominal diameter DN100mm Example 2: ≤400, it means there is a stop valve, the nominal diameter DN≤400mm Example 3: LWCQ＞800, it means there is a stop valve, the nominal diameter DN＞800mm
The plug-in turbine flowmeter is a new domestic velocity flowmeter. The turbine head, detection coil, etc. are designed as a combined plug-in. Because of its small size, the installation hole is also small. Therefore, a ball valve can be used to solve the problem of closing the installation hole.
More ingeniously, the insertion rod is made into a trapezoidal screw. When you need to remove it, you don’t need to stop the water. You can first rotate the trapezoidal screw to gradually raise the turbine head. After passing the upper ball valve, rotate the handle of the ball valve to close the pipeline. You can continue to spin up the turbine until it is removed. After installation and reset, proceed in reverse order. The same can be achieved without stopping the water.
The impeller inserted into the detection head of the plug-in turbine flowmeter is rotated by the fluid. The magnetic resistance of the magnetic circuit of the detection coil is periodically changed. The magnetic flux in the detection coil is periodically changed. Therefore, electric pulses are induced in the detection coil. Flow signal. The frequency f (times/second) of this signal is proportional to the volumetric flow Q (m3l second) flowing through the pipeline. The proportional coefficient is the meter coefficient K of the sensor, so f=K”Q.
The electrical pulse signal is amplified by the preamplifier and sent to the secondary instrument. Its waveform is rectangular pulse. After further enlargement and shaping, it is divided into two ways.
Send coefficient conversion circuit all the way. Then the power amplifier is sent to the totalizer. Obtain the cumulative volume flow. The other way sends the frequency dividing circuit. Then output 0~10mA (or 4~20mA) current signal through frequency/current conversion. At the same time, the instantaneous flow rate is displayed on the secondary meter.
Steam Vortex Flow Meters are designed for accurate, cost-effective mass flow measurement of saturated steam.
The standard loop-powered version of the vortex flowmeter is equipped with the internal temperature compensation required for direct mass flow measurement. Steam Vortex Flow Meter is provided with a 4-20mA analog output for flow rate, pulse output for totalization, and a built-in user interface and display. The standard loop-powered meter also includes HART.
The gas turbine flowmeter integrates temperature, pressure, flow sensors and intelligent flow totalizers. The gas turbine flowmeter has high accuracy and good repeatability, so it is suitable for trade measurement and industrial process detection. It is widely used in many kinds of gas in petroleum, chemical, metallurgy, aviation, scientific research and other sectors and industrial fields. Such as natural gas, city gas, propane, butane, air, nitrogen and other gases measurement.
Turbine flow meters are velocity flow meters, also called impeller flow meters. Can be used to measure the instantaneous flow and cumulative flow of liquids and gases.
Turbine flowmeters are widely used in flow measurement: petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, coal gas and cryogenic fluids. Turbine flowmeter signals can be divided into pulse signals or current signals (4-20mA). It is suitable for use with secondary display, PLC, DCS and other computer control systems.
Simply put. The turbine flow meter has a turbine. It needs to be installed in the fluid pipeline when in use, and both ends are supported by bearings.
When the fluid passes through the turbine. The fluid hits the turbine blades. Drive the rotation of the turbine blades. The flow rate is measured indirectly through the angular velocity of the turbine blades. The method used is that the angular velocity of the blades is proportional to the fluid velocity.
At present, there are many kinds of Insertion flowmeters in use. According to the working principle of the Insertion flowmeter detection head, it can be divided into Insertion turbine, Insertion vortex, Insertion electromagnetic, Insertion ultrasonic, and Insertion target flowmeter.
Insertion flow meter is a type of flow meter divided by structure, which includes various flow meters with different working principles.
Insertion flow meter has a great development. Insertion flow meter has been promoted and used in many forms.
According to the working principle of the Insertion flow meter detection head, it can be divided into plug-in turbine, plug-in vortex, plug-in electromagnetic, uniform velocity tube and thermal flow meter.
According to the number of measurement points of the Insertion flow meter, it can be divided into two categories: point flow type and runoff type.
Sino-Inst’s insertion turbine flow meters provide significant cost, savings for line sizes from 2 to 80′ without compromising performance.
With high accuracy, wide turndown, and a unique low-mass rotor design without welded joints, the insertion turbine flow meter gives you the benefit, of more than 10 years of practical experience.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Sanitary Flow Meter, also called sanitary turbine flow meter or Hygienic turbine flowmeter. Ensure Accurate Flow Measurement in Sanitary food-processing and bio-technology industries.
Sanitary turbine flow meters have stainless steel bodies and come standard with Tri-Clover fittings. Sanitary flow meter is suitable for measuring liquid without impurities. It can output pulse frequency signal. It is used to detect instantaneous flow and total integrated flow. Sanitary flow meter can be used in food, sport drink, liquor and other beverage industries, in preprocess applications.
Sanitary Turbine Flow Meter reference price: DN100. USD 300-700/pc.
Sino-Inst offers a variety of Turbine flow meters for flow measurement. If you have any questions, please contact our sales engineers.
Meets the requirements of 3-A Sanitary Standard number 28-04
316L stainless steel body and internal wetted parts
Consistent, reliable gas flow measurement
Wafer mounting configuration for limited space requirements
Anti-corrosion and anti-rust materials, suitable for the health industry;
Quick-load structure, easy to install and maintain;
High precision and good repeatability;
High-quality turbine, beyond the conventional range;
Benefits of sanitary turbine flow meter
The lightweight, balanced rotor provides instantaneous response to changes in the flow;
No mating flange design allows for quick and easy install;
Superior material of construction for high performance in aggressive environments.
The SI-LWGY Series Sanitary Turbine Flowmeters feature 316 stainless steel construction. And have a smooth finish. Which is designed to eliminate cracks and crevices where bacteria breed.
Standard flowmeters are available in sizes from 1/2″ to 2″ with sanitary clamps.
Flow rates range from 0.1 to 250 gallons per minute (0.38 to 946 LPM).
Clean liquid without impurities (water, water solution, beer beverage, glycerin, glycol)
Nominal pipe diameter
DN4-50mm
Accuracy level
±0.2%FS, ±0.5%FS, ±1.0%FS, ±1.5%FS
Repeatability error
±0.5% of measured value; ±1.0%
Linearity
1%
display
Wide screen LCD display, parameters and variables can be set through the buttons on the panel Instantaneous flow display, cumulative total display, percentage display, frequency display l/min, m³/h, Hz
Resolution
0.1 l/min, 0.005 m³/h
Operating temperature
-35-60℃ (standard type) -20-180℃ (high temperature type) -40-80℃ (explosion-proof type)
Allowable viscosity
0.8-30cm²/s
Work pressure
1.6MPa, 2.5MPa, 4.0MPa, special can be customized
shell material
Stainless steel 316L
Turbine material
Stainless steel 316L
Head material
Aluminum alloy
Bearing
Tungsten carbide bearings, ruby bearings are optional
Sanitary Flow Meter uses a new type of sanitary lining material and lining technology, which meets the sanitary requirements of the food industry. It uses a stainless steel shell and stainless steel clamp connection. It is convenient for the quick disassembly and cleaning of the electromagnetic flow meter. Magnetic flow meter in a sanitary version which meets the strict requirements of the food-processing and bio-technology/ pharmaceutical industries.
Clamp on ultrasonic flow meter is also a good choice for the health industry. Because the external clamp sensor does not need to destroy the pipe.
A turbine flow meter is a volume sensing device. As liquid or gas passes through the turbine housing, it causes the freely suspended turbine blades to rotate. The velocity of the turbine rotor is directly proportional to the velocity of the fluid passing through the flow meter.
The external pickoff mounted on the body of the flow meter, senses each rotor blade passing, causing the sensor to generate a frequency output. The frequency is directly proportional to the volume of the liquid or gas.
The gas turbine flowmeter uses a turbine for measurement. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate.
Gas turbine flowmeter is used to detect instantaneous flow and total integrated flow. Its output signal is frequency, which is easy to digitize.
The induction coil and the permanent magnet are fixed on the housing together. When the ferromagnetic turbine blade passes the magnet, the reluctance of the magnetic circuit changes, thereby generating an induction signal.
The signal is amplified and reshaped by the amplifier and sent to the counter or frequency meter. The total accumulated flow is displayed. At the same time, the pulse frequency undergoes frequency-voltage conversion to indicate instantaneous flow.
The speed of the impeller is proportional to the flow, and the number of revolutions of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal. It not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system.
The gas turbine flowmeter has a turndown ratio of up to 10:1, and the accuracy is within ±0.2%. The time constant of the turbine flowmeter with small inertia and small size can reach 0.01 second.
Liquid Turbine Flow Meter Working Principle
Liquid Turbine Flow Meter is a speed type flow meter based on the principle of torque balance.
The fluid flows through the sensor housing. Because the blades of the impeller have a certain angle with the flow direction. The impulse of the fluid makes the blades have a rotational torque. After the friction torque and fluid resistance are overcome, the blades rotate. The speed is stable after the torque is balanced.
Under certain conditions, the speed is proportional to the flow rate.
Due to the magnetic permeability of the blade, it is in the magnetic field of the signal detector (composed of permanent magnets and coils). The rotating blade cuts the magnetic lines of force. The magnetic flux of the coil is periodically changed. Electrical pulse signals are induced at both ends of the coil.
This signal is amplified and reshaped by an amplifier. A continuous rectangular pulse wave with a certain amplitude is formed. It can be transmitted to the display instrument remotely. The instantaneous flow or total amount of the fluid is displayed.
Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid flowing through the sensor. The flow equation is:
Where: f——Pulse frequency [Hz] k——The meter coefficient of the sensor [1/m3], which is given by the calibration sheet. Q——The instantaneous flow of fluid (under working condition) [m3/h] 3600-conversion factor in seconds
The meter coefficient of each sensor is filled in the verification certificate by the manufacturer. The k value is set in the matching display instrument. The instantaneous flow and cumulative total can be displayed.
Turbine flow meter advantages and disadvantages
Turbine Meter Advantages
The cost is moderate.
Very good at clean, low viscosity fluids of moderate velocity and a steady rate.
Turndown is very good as it can read very low compared to the greatest flow.
They are reliable if put in a clean fluid especially if it has some lubricity.
AGA and API approved for custody transfers.
They do cause some pressure drop where that may be a factor such as gravity flows.
High accuracy. Among all flowmeters, it is the most accurate flowmeter.
No zero drift, good anti-interference ability.
High accuracy. Among all flowmeters, it is the most accurate flowmeter.
No zero drift, good anti-interference ability.
Turbine Meter Disadvantages
Not reliable for steam.
Bearings wear out.
Requires constant backpressure to prevent cavitation.
Accuracy adversely affected by bubbles in liquids.
Turbine meters can be used with clean liquids and gases only (may need to install a strainer upstream to prevent damage from particulates).
Not applicable for measuring corrosive fluids.
May not function properly with high viscosity fluids where the flow profile is laminar.
Cannot maintain calibration characteristics for a long time.
Types of turbine flow meter
Generally speaking, according to the measuring medium, we can divide the turbine flowmeter into liquid turbine flowmeter and gas flowmeter.
Of course, according to the function of the turbine flowmeter, we can divide the turbine flowmeter into a basic turbine flowmeter and an intelligent turbine flowmeter.
Basic turbine flowmeter
The turbine sensor itself does not have the on-site display function, and only transmits the flow signal remotely. The flow signal can be divided into pulse signal or current signal. Low price, high integration, small size, especially suitable for use with secondary display, PLC, DCS and other computer control systems.
Intelligent turbine flowmeter
Intelligent turbine flowmeter, a display integrated instrument developed by combining turbine flow sensor and advanced ultra-low power single-chip microcomputer technology. It has the advantages of compact structure, high reliability, resistance to external power supply interference, lightning protection, and low cost. Three-point correction of instrument coefficients can be carried out on site, and nonlinearity of instrument coefficients can be intelligently compensated. Simultaneously display instantaneous flow, cumulative flow, temperature, pressure and other measurement parameters. It has real-time data storage function and explosion-proof function. Especially suitable for use with PLC, DCS and other computer control systems.
What is k factor in turbine flow meter?
K-factor (K value) is a factor calculated by calibrating and comparing the meter with other measuring devices that meet the accuracy requirements before putting it into use. This coefficient is a fixed value, which is the actual coefficient obtained by the flowmeter manufacturer for each meter after verification, and has nothing to do with the initial design.
There are two kinds of different manufacturers k: One is k=f/Q, which is the number of vortices generated by du unit flow; The other k=Q/f, that is, each vortex corresponds to the flow rate of Zhuan. The k value is calibrated with factory water. The sensor measures the vortex number of the instrument and compares it with the volume flow measured by the calibration device to obtain the k value.
Sino-Inst, Manufacuturer for Turbine Sanitary flow meterrs, like: gas turbine flow meter, liquid turbine flow meter, sanitary turbine flow meter, insertion turbine flow meter, steam turbine flow meter, and natural gas turbine flow meter.
Sino-Inst’s Turbine Sanitary flow meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Liquid turbine flow meter is the main type of impeller flow meter. Turbine flow meter sensor uses a multi-blade rotor to sense the average flow rate of the fluid. Belongs to speed flow meter.
Liquid turbine flow meter is the main type of impeller type flow (velocity) meter. It is composed of sensors and conversion display. The sensor uses a multi-blade rotor to sense the average flow rate of the fluid, thereby deriving the flow or total amount. Liquid turbine flow meter is suitable for measuring liquids that are not corrosive to stainless steel 1Cr18Ni9Ti, 2Cr13 and corundum Al2O3 in closed pipelines and are free of impurities. For milk, soybean oil, edible oil, diesel, purified water.
The repeatability is good, and the short-term repeatability can reach 0.05%~0.2%. It is precisely because of the good repeatability, such as frequent calibration or online calibration can get extremely high accuracy. It is the preferred flow meter in trade settlement;
High precision, generally up to ±1%R, ±0.5%R, high-precision type up to ±0.2%R;
Output pulse frequency signal. No zero drift, strong anti-interference ability;
Can get very high frequency signal (3~4kHz). Strong signal resolution;
Wide range. Medium and large diameters can reach 1:20, and small diameters are 1:10;
The structure is compact and light. It is convenient to install and maintain, and has a large circulation capacity;
Suitable for high-pressure measurement. No holes are required on the meter body, and it is easy to make a high-pressure meter;
It can be made into an insert type, suitable for large-caliber measurement. The pressure loss is small, the price is low. It can be taken out continuously, and the installation and maintenance are convenient.
Turbine Flow Meter Advantages and Disadvantages
Advantages: (1) High precision, among all flowmeters, it is the most accurate flowmeter; (2) Good repeatability; (3) Element zero drift, good anti-interference ability; (4) The range is wide; (5) The structure is compact.
Disadvantages: (1) The calibration characteristics cannot be maintained for a long time; (2) The physical properties of the fluid have a great influence on the flow characteristics.
304 stainless steel, 316 (L) stainless steel, etc.
Measured medium temperature (℃)
-20~+80℃;-20~+120℃; -20~+150℃;
Environmental conditions
Temperature -10~+55℃, relative humidity 5%~90%, atmospheric pressure 86~106kPa
output signal
Sensor: pulse frequency signal, low level≤0.8V, high level≥8V Transmitter: two-wire 4~20mADC current signal
Power supply
A. External power supply: +24VDC±15%, ripple ≤±5% for 4-20mA, pulse output, R485, etc. B. Internal power supply: 1 set of 3.0V10AH lithium battery, the battery voltage is normal when the battery voltage is 2.0-3.0V
DN4-DN40 caliber sensor is a threaded connection, the maximum working pressure is 6.3Mpa;
DN50-DN200 caliber sensor is a flanged connection, the maximum working pressure is 2.5Mpa;
The DN4-DN10 caliber sensor has straight pipe sections and filters.
Sensors with a diameter above DN15 can be supplied with straight pipe sections.
Sensors with DN25-DN40 caliber can also be made as flanged connections, but this must be stated when ordering.
Liquid Turbine Flow Meter Applications
Turbine flowmeter is a kind of speed meter. It has the advantages of high precision, good repeatability, simple structure, few moving parts, high pressure resistance, wide measurement range, small volume, light weight, small pressure loss, and convenient maintenance.
Applications for turbine flowmeters can be found in the water, petroleum and chemical industries. Water applications include distribution systems within and between water bodies. Petroleum applications include custody transfer of hydrocarbons. Other applications can be found in the food and beverage and chemical industries.
When measuring diesel oil, a liquid turbine flowmeter can generally be selected for measurement.
Why is the liquid turbine flowmeter suitable for measuring diesel? Liquid turbine flowmeter has high anti-electromagnetic interference and anti-vibration ability. In addition, it has a wide range. Not only can measure medium and small calibers, but also large calibers can be measured.
Liquid turbine flowmeters can be divided into flange connection, threaded connection, plug-in type and clamp type sanitary type according to the installation method. The specific installation method needs to be selected according to the on-site selection.
Turbine flowmeters are also a good choice when you need to measure water flow.
Perhaps, you would say, an electromagnetic flowmeter is a better choice. Yes, in most cases, we will choose electromagnetic flowmeter to measure water flow. However, if the electromagnetic flowmeter cannot measure it. For example, raw water, non-conductive aqueous solution, etc. Then, we can consider using a turbine flowmeter.
Gas turbine flow meter is a velocity flow meter that measures gas flow. For natural gas, nitrogen, and gas trade measurement.
The gas turbine flowmeter integrates temperature, pressure, flow sensors and intelligent flow totalizers. The gas turbine flowmeter has high accuracy and good repeatability, so it is suitable for trade measurement and industrial process detection. It is widely used in many kinds of gas in petroleum, chemical, metallurgy, aviation, scientific research and other sectors and industrial fields. Such as natural gas, city gas, propane, butane, air, nitrogen and other gases measurement.
Gas turbine flowmeters are widely used in petroleum, chemical, metallurgy, aviation, scientific research and other departments and various gases in industrial fields, such as natural gas, city gas, propane, butane, air, nitrogen and other gases. The instrument has high accuracy and good repeatability, and is suitable for trade measurement and industrial process detection.
Liquid Turbine Flow Meter is a speed type flow meter based on the principle of torque balance.
The fluid flows through the sensor housing. Because the blades of the impeller have a certain angle with the flow direction. The impulse of the fluid makes the blades have a rotational torque. After the friction torque and fluid resistance are overcome, the blades rotate. The speed is stable after the torque is balanced.
Under certain conditions, the speed is proportional to the flow rate.
Due to the magnetic permeability of the blade, it is in the magnetic field of the signal detector (composed of permanent magnets and coils). The rotating blade cuts the magnetic lines of force. The magnetic flux of the coil is periodically changed. Electrical pulse signals are induced at both ends of the coil.
This signal is amplified and reshaped by an amplifier. A continuous rectangular pulse wave with a certain amplitude is formed. It can be transmitted to the display instrument remotely. The instantaneous flow or total amount of the fluid is displayed.
Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid flowing through the sensor. The flow equation is:
Where: f——Pulse frequency [Hz] k——The meter coefficient of the sensor [1/m3], which is given by the calibration sheet. Q——The instantaneous flow of fluid (under working condition) [m3/h] 3600-conversion factor in seconds
The meter coefficient of each sensor is filled in the verification certificate by the manufacturer. The k value is set in the matching display instrument. The instantaneous flow and cumulative total can be displayed.
The liquid turbine flowmeter is a precision flow measuring instrument. The liquid turbine flowmeter and the corresponding flow totalizer can be used to measure the flow and total amount of liquid.
Liquid turbine flow meters equipped with sanitary joints can be used in the pharmaceutical industry.
Filling measurement of pure water produced by reverse osmosis desalination method
In the application of reverse osmosis equipment, it can be used to supply process pure water in the pharmaceutical, chemical, electronic, electroplating and other industries. It can also be used as a production line for drinking bottled and bottled water, as well as food and beverage.
Field Application of Flowmeter in Thermal Power Plant System
The instruments and meters used in thermal power plants mainly include temperature, pressure, liquid level, and flow. There are many types of flowmeter instruments in this system. Depending on the nature of the medium, different flow rates have different effects.
Boiler water supply process
The treatment of boiler make-up water plays a vital role in the overall operation of the boiler. The application of liquid turbine flow meters directly affects the health and smooth operation of the process.
Sino-Inst’s turbine flow meters, made in China. Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Gas turbine flow meter is a velocity flow meter that measures gas flow. For natural gas, nitrogen, and gas trade measurement.
The gas turbine flowmeter integrates temperature, pressure, flow sensors and intelligent flow totalizers. The gas turbine flowmeter has high accuracy and good repeatability, so it is suitable for trade measurement and industrial process detection. It is widely used in many kinds of gas in petroleum, chemical, metallurgy, aviation, scientific research and other sectors and industrial fields. Such as natural gas, city gas, propane, butane, air, nitrogen and other gases measurement.
Gas Turbine Flow Meter reference price: USD900-2500/pc
Sino-Inst offers a variety of Turbine flow meters for flow measurement. If you have any questions, please contact our sales engineers.
High accuracy, good repeatability. Small pressure loss, good vibration resistance;
Using high-quality bearings, low friction resistance, good sealing performance and long life;
It integrates microprocessor, flow sensor, high-precision temperature and pressure sensor. Directly measure the flow, temperature and pressure of the measured gas. And automatically perform flow tracking compensation and compression factor correction operations;
The meter has pulse signal and analog signal output. It can directly realize the centralized collection and real-time management of computer data through the RS485 communication interface or the GPRS system;
Low power consumption, can be powered by internal battery or external power supply;
With real-time data storage function, it can prevent data loss when the battery is replaced or the power is suddenly lost. In the case of power failure, internal data can be stored permanently;
It can be used in conjunction with IC card prepayment system to facilitate trade settlement;
Specifications Of Gas Turbine Flow Meter
Mediun :
No impurity, no corrosive gas, natural gas, etc.
Precision:
±1.5%, ±1.0%, ±0.5%,
Repetition:
Better than 0.1%
Traffic Range:
6.5~6500m³/h
Display content:
instantaneous working conditions, volume, standard volume, temperature, pressure, battery capacity, etc.
Calibre measurement:
DN50-DN300
Connection mode:
Flange connection
Power supply:
Battery or external power supply operation
Output:
Pulse signal output, 4-20mA current output, RS485 communication GPRS remote communication
Inside nominal diameter DN (mm)
Made
Flow specification
Startup flow rate (m3/h)
Range of flow (m3/h)
Pressure rating (Mpa)
Sell material
Accuracy
50(2”)
KLWQD-501
G40
≤0.8
6.5~65
1.6 2.5
Aluminum alloy
Accuracy 1.0:
The allowable error is Qmin~0.2Qmax:±2%; 0.2Qmax~Qmax;±1%
KLWQD-502
G65
≤0.9
10~100
KLWQD-503
G100
≤1.7
16~160
80(3”)
KLWQD-801
G100
≤2.0
10~200
1.6 2.5
Aluminum alloy
KLWQD-802
G160
≤2.5
18~360
KLWQD-803
G250
≤3.0
20~400
100(4”)
KLWQD-1001
G160
≤2.5
13~250
1.6
Aluminum alloy
KLWQD-1002
G250
≤3.0
20~400
KLWQD-1003
G400
≤4.5
32~650
150(6”)
KLWQD-1501
G400
≤7.5
32~650
1.6
Aluminum alloy
KLWQD-1502
G650
≤8.5
50~1000
KLWQD-1503
G1000
≤10.0
80~1600
200(6”)
KLWQD-2001
G650
≤12.0
50~1000
1.6
carbon steel
Accuracy 1.5:The allowable error is Qmin~0.2Qmax:±3.0%; 0.2Qmax~Qmax;±1.5%
KLWQD-2002
G1000
≤16.0
80~1600
KLWQD-2003
G1600
≤20.0
130~2500
250(10”)
KLWQD-2501
G1000
≤20.0
80~1600
1.6
carbon steel
KLWQD-2502
G1600
≤22.0
130~2500
KLWQD-2503
G2500
≤25.0
200~4000
300(12”)
KLWQD-3001
G1600
≤22.0
130~2500
1.6
carbon steel
KLWQD-3002
G2500
≤35.0
200~4000
KLWQD-3003
G4000
≤45.0
320~6500
What Are Gas Turbine Flow Meter?
When the fluid flows into the Gas Turbine Flow Meter, it is rectified and accelerated under the action of a dedicated integrated rectifier for the air inlet. Since the turbine blades are at a certain angle to the fluid flow direction, the angular velocity of the turbine is proportional to the fluid volume flow at this time.
According to the principle of electromagnetic induction, a magnetic sensor is used to induce a pulse signal proportional to the volume flow of the fluid from the coaxial rotating signal wheel. The signal is amplified, filtered, and reshaped and enters the intelligent flow totalizer together with the temperature and pressure sensor signals. The micro-processing unit of the instrument performs arithmetic processing. The volume flow and total flow of the gas are directly displayed on the LCD screen.
Please see the structure diagram below for the structure principle of Gas Turbine Flow Meter.
Gas turbine flow meter working principle
The gas turbine flowmeter uses a turbine for measurement. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate.
Gas turbine flowmeter is used to detect instantaneous flow and total integrated flow. Its output signal is frequency, which is easy to digitize.
The induction coil and the permanent magnet are fixed on the housing together. When the ferromagnetic turbine blade passes the magnet, the reluctance of the magnetic circuit changes, thereby generating an induction signal.
The signal is amplified and reshaped by the amplifier and sent to the counter or frequency meter. The total accumulated flow is displayed. At the same time, the pulse frequency undergoes frequency-voltage conversion to indicate instantaneous flow.
The speed of the impeller is proportional to the flow, and the number of revolutions of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal. It not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system.
The gas turbine flowmeter has a turndown ratio of up to 10:1, and the accuracy is within ±0.2%. The time constant of the turbine flowmeter with small inertia and small size can reach 0.01 second.
Gas turbine flowmeters are mainly used for gas flow measurement in industrial pipelines.
Flow measurement of air, nitrogen, oxygen, hydrogen and other media fluids.
When measuring the volume flow under working conditions, it is hardly affected by the fluid density, pressure, temperature, viscosity and other parameters.
The gas turbine flowmeter has the characteristics of high sensitivity, good repeatability, large range ratio and high precision. Therefore, it is widely used in natural gas flow measurement.
When the flow rate changes greatly, the gas turbine flowmeter is more suitable than the differential pressure flowmeter. The gas turbine flowmeter has a wide range ratio, medium and large diameters can reach 40:1 to 10:1, and small diameters are 6:1 or 5:1.
With the development of natural gas measurement technology and the increasing requirements for natural gas trade and transfer measurement, gas turbine flowmeters can not only meet the requirements of trade measurement, but also meet a wide measurement range.
In addition, its equipment cost is lower than orifice flow meters and gas ultrasonic flow meters. Therefore, gas turbine flow meters are being used more and more widely. Especially China’s natural gas market usage has increased significantly. However, it is common in the downstream market that the initial consumption of natural gas pipelines is low. Large supply. Turbine flowmeter can reduce the diameter of the measuring tube due to its wider range ratio, thereby reducing investment.
The gas turbine flowmeter has high accuracy. The accuracy of ordinary flowmeters is (±1～±1.5)%, and the special type is (±0.5～±0.2)%. However, the higher the accuracy, the more demanding on-site conditions. harsh. Turbine flowmeter has good repeatability. Short-term repeatability can reach (0.05～0.2)%. If you calibrate regularly, you can get high accuracy.
The gas turbine flowmeter has a compact and light structure, convenient installation and maintenance, and large flow capacity. It is suitable for high pressure measurement.
There is no need to open holes on the meter body, and it is easy to make a high-pressure meter, which can meet the pressure increase requirements of the pipeline. Because of the above advantages, it is one of the preferred flow meters in natural gas trade settlement.
Sino-Inst’s turbine flow meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Insertion Vortex Flow Meter is mainly used for flow measurement of gas, liquid, and steam fluid in large-diameter pipelines.
Insertion Vortex Flow Meter is used on large-size pipes. Reduce piping installation to save costs. The insertion vortex flowmeter is mainly used for large-caliber gas, liquid and vapor medium fluids. When measuring volume flow, it is hardly affected by fluid density, pressure, temperature and viscosity. With plug-in structure, there is no need to cut pipes and drill welded flanges. Just plug it in, easy to install. Greatly save labor costs and product costs.
Insertion Vortex flow meter reference price: USD 500-1500/pc.
Sino-Inst offers a variety of Vortex flow meters for flow measurement. If you have any questions, please contact our sales engineers.
It is suitable for the measurement of large-diameter pipelines (DN150~DN2000), and is used in occasions that require less precision;
Easy installation, no need to cut pipes. Greatly save labor costs and product costs;
It has a very unique medium versatility. It can be used for flow measurement and control of most steam, gas and liquid;
Simple structure, no holes and gaps design. No wear, dirt, no moving parts, low failure rate. Has high stability and reliability;
The vortex flowmeter uses the latest signal processing technology, and the entire system analyzes the measured signal. Then eliminate external interference and medium disturbance. Therefore, stable measurement can be achieved even in harsh process conditions;
The piezoelectric element of the vortex flowmeter is embedded in the probe body. No contact with the medium, no filler inside. Low pressure loss and long service life;
The vortex flowmeter originally forms a signal. Its output frequency has a linear relationship with flow rate. There is no zero drift problem;
Adopt advanced digital signal processing technology. Low lower limit and excellent vibration resistance.
Specifications of Insertion Vortex Flow Meter
Measuring medium
Superheated/saturated steam, liquid and gas
Measuring range
See the flow range table of the plug-in vortex flowmeter for details
Diameter
Plug-in: DN150~DN2000
Connection method
Pipe opening with connecting flange Flange standard GB9119-2000 1.6, 2.0, 2.5, 4.0 (MPa)
structure
Integrated type, split type, diving type
Probe body insertion rod
304 (standard supply), 316L (other material supply agreement)
Medium temperature (℃)
(-40~80)℃, (-40~250)℃, (-40~350)℃
Environment temperature (℃)
(-30~+65)℃ Atmospheric pressure: 86kPa～106kPa
Nominal pressure
Liquid 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa Gas and steam 1.6MPa, 2.5MPa
Accuracy
2.50%
Velocity range (m/s)
Liquid: 0.5~5, Gas: 6~500, Steam: 7~60
Output signal
1: No local display frequency signal: high level ≥5V low level 1V, square wave, pulse duty ratio: 1:1 2: Standard current signal; (4-20) mA standard current signal proportional to the flow 3: Local display instantaneous flow, cumulative flowmeter. Simultaneously output the proportional (4-20) mA standard current signal and pulse frequency signal or (4-20) mA+HART
Power supply
Voltage pulse type: DC12V or DC24V Standard current output, local display: DC24V Battery powered local display lithium battery: 3.6V
When a fluid moves through a stationary object (“bluff body”) with a high Reynolds number, the fluid becomes a vortex on either side of the object. Each vortex will form, then separate from the object and continue to move with the flowing gas or liquid, once twisted in an alternating manner. This phenomenon is called vortex rotation, and the pattern of moving vortices carried downstream of a stationary object is called vortex street.
How does a vortex flow meter work?
Vortex Flow Meter Working Principle
Vortex flowmeter is a speed-type flowmeter produced according to karman’s vortex principle, which can be used for the measurement and measurement of conventional gas, steam and liquid.
Vortex flow sensor has high precision and wide range ratio, no moving parts in use, which can improve mechanical stability and reduce maintenance.Vortex flowmeter is almost not affected by the temperature, pressure and composition of medium when measuring the volume of working condition.
Therefore, it is convenient to calibrate the instrument, so vortex street flow sensor is widely used in production and life.
When a trigonal column vortex generator is set in the fluid, regular vortices are generated alternately on both sides of the vortex generator, which is called Carmen vortex.
The vortex columns are arranged asymmetrically downstream of the vortex generator. Vortex flowmeter is produced according to this principle.
Vortexes are generated by generating bodies and the number of vortexes is detected by high-sensitivity sensors. In a certain range, the number of vortexes generated is proportional to the flow rate.
In vortex flowmeter, the relationship between flow rate and the number of vortexes generated can be expressed by the following formula：
Q：Operating volume flow of the measured medium. The unit is m3/h。 F：Frequency of the number of vortices produced by the generating body. The unit is Hz. K：Refers to the calculated or calibrated flow coefficient. It represents how many frequency signals per cube. the coefficient is usually obtained by calibration.
The formula of standard table method calibration coefficient K:
Depending on the mounting style, the types of vortex flow meters include:
Insertion flow meter Each insertion type of vortex flow meter consists of a built-in bluff body and three sensors, namely one sensor to record the vortex shedding frequency, an RTD temperature sensor, and a solid-state pressure sensor. These components are located in close proximity to each other in a short tube and together they form an assembly called an insertion sensor head. The sensor probe is inserted carefully into a hole made into the pipeline using flanged or male NPT process connections.
This flow meter is also provided an LCD display and keypad to program and monitor the system settings. The insertion flow meter used in pipes which are 2 inches or larger. Since it is a retractable meter, there is no need to shut down the system to take the required measurements.
Inline flow meter An Inline flow meter is similar to the insertion flow meter in terms of its components. It also has a bluff body and three sensors to register the vortex shedding frequency, temperature, and pressure. It differs from an insertion flow meter in that it replaces a part of the pipeline and not inserted through it.
Classified by connection method
The connection mode of vortex flowmeter and pipeline can be divided into flange connection type and flange clamping type. These two connection types have their own advantages.
The flange connection type connects the vortex street meter body and the flange into a whole, which is easy to install. But it increases the machining cost for the manufacturer. For different pressure levels, flanges with different pressure levels need to be cast and smelted. The user needs to install the matching anti-flange on the pipe during installation.
However, the flange-mounted flowmeter has no bulky flanges at both ends, which is relatively light. On the premise of ensuring the sealing surface and mechanical strength requirements, it is enough to only manufacture the flangeless surface.
When users use it, they can choose flanges with different pressure levels according to different working pressures. Connect it with bolts, and then directly weld to the pipe.
Where are vortex flow meters used?
The vortex flowmeter is mainly used in the flow measurement of industrial pipeline medium fluid. The medium can be gas, liquid, steam, etc. The main scope of action includes:
During industrial production, such as metallurgy, coal, electric power, chemical, pharmaceutical, environmental protection and other manufacturing;
Energy measurement. Including the scientific measurement of primary and secondary energy. Such as coal, petroleum gas, natural gas, etc., to achieve energy saving and reduce consumption;
Environmental protection engineering. Including flow measurement of flue gas, sewage, etc.;
Transportation. Including pipeline transportation for control, distribution and scheduling, and better economic accounting through measurement results.
Vortex flow meter advantages and disadvantages
1.Advantages of vortex flowmeter
(1) The vortex flowmeter has no moving parts, and the measuring element has a simple structure, reliable performance and long service life.
(2) The vortex flowmeter has a wide measuring range. The turndown ratio can generally reach 1:10.
(3) The volume flow of the vortex flowmeter is not affected by thermal parameters such as the temperature, pressure, density or viscosity of the fluid being measured. Generally, no separate calibration is required. It can measure the flow of liquid, gas or steam.
(4) The pressure loss it causes is small.
(5) The accuracy is high, the repeatability is 0.5%, and the maintenance is small.
2.Disadvantages of vortex flowmeter
(1) The volume flow of the vortex flowmeter is not affected by the temperature, pressure, density and other thermal parameters of the measured fluid. But the final measurement result of liquid or steam should be mass flow, and for gas, the final measurement result should be standard volume flow. Both mass flow or standard volume flow must be converted by fluid density. The changes in fluid density caused by changes in fluid operating conditions must be considered.
(2) The main factors that cause flow measurement errors are: measurement errors caused by uneven pipeline flow rates; it is impossible to accurately determine the medium density when the fluid working condition changes. The wet saturated steam is assumed to be dry saturated steam for measurement. If these errors are not limited or eliminated, the total measurement error of the vortex flowmeter will be very large.
(3) Poor vibration resistance. External vibration can cause measurement errors of the vortex flowmeter, or even fail to work normally. The high-velocity impact of the channel fluid will cause additional vibrations to the cantilever of the vortex generator, which reduces the measurement accuracy. The influence of large pipe diameter is more obvious.
(4) Poor adaptability to measuring dirty media. The generating body of the vortex flowmeter is very easy to be dirty by the medium or entangled by the dirt, and the change of the geometric body size has a great influence on the measurement accuracy.
(5) High requirements for straight pipe sections. Experts pointed out that the straight pipe section of the vortex flowmeter must ensure the front 40D and the 20D to meet the measurement requirements.
(6) Poor temperature resistance. Vortex flowmeters generally can only measure the fluid flow of media below 300°C.
Insertion vortex flow meter installation
1.Continuous flow dismountable sensor
①The mounting seat is welded well. First install the ball valve on the mounting seat, tighten and seal with bolts;
②Open the ball valve. Insert the vortex probe into the ball valve. Then tighten the lifting mechanism and the ball valve with bolts. Pay attention to sealing;
③Before leaving the factory. The insertion depth of the measuring head has been adjusted. Do not adjust or disassemble the measuring head at will. Otherwise, it may cause leakage or affect measurement accuracy.
2. Dismountable sensor after the current is cut off
Because the insertion depth of the sensor is designed according to the user’s measuring pipe diameter. So only pay attention to the installation direction when installing. Fasten it with bolts.
The vortex steam flow meter concentrates temperature and pressure compensation in the vortex flowmeter. Automatically detect the temperature and pressure of the medium in the pipeline, and the density automatically participates in the calculation. It can display the instantaneous mass flow and cumulative mass flow of the medium. It can also display the temperature and pressure of the medium. It can measure liquid, general gas, saturated steam, superheated steam, etc.
Sino-Instt offer over 10 Insertion Vortex Shedding flow meters, with Best Price.
A wide variety of industrial Vortex shedding flow meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.
Sino-Inst is Insertion Vortex shedding flow meter suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Steam flow meter is mainly used for the steam flow measurement. The vortex flow meter concentrates temperature and pressure compensation. Can measure superheated/saturated steam, liquid and gas.
The vortex steam flow meter concentrates temperature and pressure compensation in the vortex flowmeter. Automatically detect the temperature and pressure of the medium in the pipeline, and the density automatically participates in the calculation. It can display the instantaneous mass flow and cumulative mass flow of the medium. It can also display the temperature and pressure of the medium. It can measure liquid, general gas, saturated steam, superheated steam, etc.
Vortex steam flow meter reference price: USD 200-1500/pc.
Sino-Inst offers a variety of Vortex flow meters for flow measurement. If you have any questions, please contact our sales engineers.
Easy to install. It is suitable for the measurement of steam, compressed air and other gases;
Integrated temperature and pressure dual compensation. The instantaneous flow and accumulated flow, temperature, pressure and other data after compensation can be directly read on the meter head;
It has a very unique medium versatility. It can be used for flow measurement and control of most steam, gas and liquid;
Simple structure, no holes and gaps design. No wear, dirt resistance, no moving parts, low failure rate. It has high stability and reliability;
The vortex flowmeter uses the latest signal processing technology, and the entire system analyzes the measured signal. Then eliminates external interference and media disturbance. Therefore, stable measurement can be achieved even in harsh process conditions;
The piezoelectric element of the vortex flowmeter is embedded in the probe body. It does not touch the medium. There is no filling material inside. The pressure loss is small and the service life is long;
The original signal formed by the vortex flowmeter. Its output frequency has a linear relationship with the flow rate. There is no zero drift problem;
Adopt advanced digital signal processing technology. Low lower limit. Excellent anti-vibration performance.
Liquid 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa, 5.0MPa, 6.3MPa, 10.0MPa, 25MPa Gas and steam 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa, 5.0MPa
Accuracy
±1.0%, ±1.5%
Flow rate range (m/s)
Liquid: 0.15~7 Gas: 1.5~60 Steam: 2~70
output signal
Three-wire voltage pulse: high level≥5V low level<1V Standard current signal: (4-20) mA standard current signal proportional to the flow rate, local display flow, cumulative flow. And output proportional to the flow rate (4-20) mA standard current signal and pulse frequency signal Communication method: RS-485 communication
Power supply
Three-wire voltage pulse: DC12V, DC24V Standard current output, local display: DC24V Battery power supply (lithium battery): 3.6V
Ambient temperature
(-20~+70)°C atmospheric pressure: 86kPa~106kPa
Protection level
IP65
Explosion-proof grade
Intrinsically safe Ex ia ⅡC T6 Ga
display
LCD displays instantaneous flow, cumulative flow, vortex frequency, temperature and pressure (integrated temperature and pressure)
Or, How steam flow is measured? How is the steam flow rate calculated?
The basic principle of the intelligent vortex flowmeter, is the Karman vortex principle. That is “the vortex separation frequency is proportional to the flow velocity”.
The diameter of the flowmeter body is basically the same as the nominal diameter of the meter. The axis of the cylinder is perpendicular to the flow direction of the measured medium, and the bottom surface greets the fluid.
When the measured medium flows through the cylinder, Vortex is alternately generated on both sides of the column, and the vortex is continuously generated and separated.
In the downstream of the column, two rows of vortices, namely “vortex street”, are formed. Theoretical analysis and experiments have shown, that the frequency of vortex separation is proportional to the flow rate of the column side medium.
f=(sr*V)/d
In the formula:
F── the frequency of the vortex separation of the column side (Hz);
V── column side flow rate (m/s);
D── the width of the cylinder facing surface (m);
Sr ─ Strauhal number.
It is a constant that is substantially independent of fluid properties, and flow rate depending on the shape of the cross-section of the cylinder.
Temperature and pressure compensation of vortex steam flowmeter
Gases are compressed fluids. If its volume state has changed. It is mainly caused by changes in temperature and pressure indicators.
In the process of measuring the gas flow, on the one hand, the flowmeter must be able to accurately output the standard volume flow. On the other hand, the output of mass flow is also required.
And the vortex flowmeter is used to measure the volume flow. It is necessary to ensure that the measurement is carried out in the environment of the working condition. Therefore, the vortex flowmeter is used in the measurement process of general gas and steam. The temperature and pressure compensation function should be fully considered. And make a reasonable instrument selection.
After temperature and pressure compensation, the volume flow of the working condition can be converted into a mass flow. Or it is converted into other volume flow, that is, the standard volume flow.
For general gases during measurement. The compensation principle is to calculate according to the formula, which belongs to the standard gas state equation:
P0V0/T0= P1V1/T1.
where: The absolute pressure (Pa) in the standard state represented by P0; The absolute pressure (Pa) in the working state represented by P1; T0 represents the thermodynamic temperature (K) in the standard environment; T1 represents the thermodynamic temperature (K) under working conditions; V0 represents the gas volume in the standard environment; V1 is the gas volume in the operating state.
During the steam measurement. The work that needs to be done is the compensation of saturated steam. There are two methods of application, one is pressure compensation and the other is temperature compensation.
There are usually two specific compensation modes.
That is, if the vortex flowmeter sensor does not have a temperature detection element and built-in pressure. Static compensation can only be implemented inside the instrument. That is to say, the compensation is realized by inputting the fixed pressure value and temperature value. This mode is more suitable for occasions without large temperature and pressure changes.
If the vortex flowmeter sensor has a temperature detection element and built-in pressure. The meter takes into account the results of the measured temperature and pressure. Master the state of steam. Determine which type of steam is superheated steam or saturated steam.
For mass flow, the calculation method needs to obtain the steam database index stored in the instrument and implement intelligent calculation. The other is to use the steam flow totalizer. in the steam flow totalizer. The volume flow and temperature of the working conditions measured by the transmission vortex flowmeter. And to transmit the signal measured by the pressure transmitter.
The steam flow totalizer has built-in superheated steam and saturated steam compensation algorithms. Can accurately output mass flow and standard volume flow. Moreover, the heat and specific enthalpy can be output correctly.
In the measurement of steam flow, the differential pressure flowmeter still ranks first. It is based on authoritative standards and has test pieces that are easy to copy. The structure is simple, firm, reliable, and has a long service life. The usable temperature and pressure range is wide. Low price, no need for real flow calibration and other advantages.
The complete set of differential pressure flow meters is composed of standard throttling devices, differential pressure transmitters and flow totalizers from different manufacturers, so it is flexible and convenient to use.
The differential pressure flowmeter is especially suitable for measuring high temperature, high pressure saturated steam and superheated steam.
Differential pressure flow meters also have shortcomings. Such as: installation is more complicated, easy to leak, maintenance and disassembly labor intensive. The turndown ratio is only 3:1, and the pressure loss is large. Due to changes in the measurement conditions during use, the process parameters deviate from the design values, which will cause larger measurement errors.
The vortex flowmeter has a simple structure and does not need a pressure guiding tube. The measurement range is large, and the turndown ratio can reach 10:1. The advantages of small pressure loss, etc., account for an increasing proportion of saturated steam flow measurement. The installation difficulty is similar to the orifice plate, and it has certain requirements for straight pipe sections.
Vortex flowmeters also have disadvantages. For example, regular verification cannot be done by general users and needs to be removed for inspection. Its stability is affected by the flow rate, and the stress-type vortex flowmeter is more sensitive to vibration and is susceptible to measurement errors due to the impact of pipeline or equipment vibration. Vortex flowmeters are also limited by temperature. Generally, it cannot exceed 500°C. The vortex flowmeter cannot be used to measure multiphase flow.
Rotary wing steam flowmeter has a wide range of applications in the measurement of saturated steam in small and medium-sized enterprises. It is a measuring instrument based on pure mechanical principles. It has simple structure, firmness and low maintenance. Only the inner orifice plate needs to be replaced to adjust the range. It also has the advantages of manual adjustment of pressure compensation, and no power supply. But there are also shortcomings. Such as: straight pipe section has certain requirements. The adaptable range of pipe diameter is limited and can only be installed horizontally. The accuracy is not high, and manual meter reading is not convenient for measurement management.
The range of fluid media has been expanded: gas, gas and liquid, and liquid. Proprietary humidity algorithm software makes fluid flow measurement more accurate.
The replacement of the sensor does not require recalibration. The instrument adopts modular design, which realizes interchangeability and is easy to maintain.
Using Bluetooth and GPGS technology, it is convenient for on-site and remote monitoring and maintenance of the instrument.
Adopt “FLUD” proprietary fluid software technology to make the straight pipe section needed for instrument measurement shorter
No drift, maintenance-free, and high sensitivity.
When the product is installed and running, there is no need to use any measurement system as a reference standard for calibration.
Various functions are set up on site configuration.
The measuring principle of the V cone flowmeter is the same as that of the differential pressure flowmeter, and it is also a throttling differential pressure flowmeter.
When measuring gas flow and steam flow, the v-cone flowmeter measures high temperature and high pressure, and the flow of normal temperature and normal pressure media is a small expert in measurement.
The v-cone flowmeter is actually a differential pressure flowmeter, and the measurement flow is calculated by capturing the pressure difference before and after the throttling device. This is an internationally certified measuring throttling device. Even leaving the factory without calibration, the purpose of high-precision flow measurement can be achieved.
The elbow flowmeter is an elbow with a fixed geometric size and a fixed shape. Its structure is simple, without any additional parts and throttling parts. Therefore, there is basically no pressure loss. The turndown ratio can reach 10:1. High precision, maintenance-free measuring device, long life, high temperature resistance, high pressure resistance, vibration resistance, etc.
But there are also shortcomings. For example, the differential pressure generated by the measurement is relatively low, generally around 3000 Pa. Therefore, the selection requirements for differential pressure transmitters are relatively high. When measuring steam flow, temperature and pressure compensation are still required.
The flute-shaped uniform velocity tube flowmeter is based on the pitot tube velocity measurement principle. It outputs a differential pressure signal. Used in conjunction with a differential pressure transmitter for measuring differential pressure. It can measure the flow of steam, liquid and gas. The structure is simple, the pressure loss is small, and the length of the upstream and downstream straight pipe sections is short. Easy to install, the range ratio can reach 10:1. It is resistant to high temperature and pressure, is not affected by abrasion, and has no leakage.
The flute-shaped average velocity tube flowmeter also has its shortcomings. If the on-site installation conditions are demanding, the differential pressure generated is small, and some are only 20-30Pa. Must be equipped with high-precision differential pressure transmitter.
Due to the structure, the flow rates of the pressure ports are different, and there is a certain pressure difference between the pressure ports. There is a flow of medium between the pressure holes. If there is a medium, it may be blocked and cause measurement errors. The fluid to be measured flows in the circular tube, and the pressure distribution caused by the circular tube is different when the fluid flows in due to the different separation points of the fluid. The flow coefficient is unstable and the flow is unstable.
The clamp-on ultrasonic flowmeter cannot measure steam. Generally, it measures the flow of medium such as water and uniform liquid. The measurement of steam generally uses a temperature and pressure compensated vortex flowmeter or a differential pressure flowmeter.
Portable Steam Flow Meter
The FLUXUS G601 ST is the world’s ONLY clamp on steam meter! This device is able to measure steam flow non-invasively from outside the pipe which means that there is no interruption of operation or supply. This also means there is no pressure loss, need to open the pipe, or to reduce the pipe size for measurement.
What is BTU Meter for Chilled Water? The BTU Meter for Chilled Water accurately measures the thermal energy consumed by chilled water in British Thermal Units (BTU). This…
What is PD flow meter? PD flow meters (positive displacement flow meters) are the only flow measurement technology that directly measures the volume of fluid passing through the…
Fuel Flow Meter for Boat refers to a flow meter dedicated to measuring marine fuel. There are many types of marine fuel oil. Mainly include light diesel, heavy…
Digital Fuel Flow Meter is a flow meter dedicated to measuring fuel, diesel, gasoline, and petroleum. Digital Fuel Flow Meter generally has a digital display or signal output…
Mechanical water flow meters refer to a type of flow meter suitable for clean water processes or applications. The working principle of a mechanical water flow meter is…
Water flow measurement is common in both industry and life. You may often hear about the use of electromagnetic flowmeters to measure wastewater. The clamp-on ultrasonic flowmeter measures…
A flow totalizer meter is sometimes referred to as a flow meter or flow totalizer. flow totalizer meter displays the flow rate from either an analog or pulse…
Flow Meter Types There are many types of flow meters. Basically, there are the following types of flow meters Why are there so many types of flow meters?…
What is Strap on Ultrasonic Flow Meters? Strap on Ultrasonic Flow Meter is also often called Clamp On Type Flow Meter. The unique feature of Strap on Ultrasonic…
In fact, different steam flow meters work differently. Of course, the most commonly used is definitely the vortex flowmeter. The steam flowmeter is a volumetric flowmeter that measures the volume flow of gas, steam or liquid, the volume flow of standard conditions or the mass flow according to the Kármán Vortex Street principle. And can be used as flow transmitter in automatic control system.
How is steam flow measured? Maybe everyone knows how to measure with a flowmeter. Because there are many types of flow meters on the market, I don’t know how to choose. There are measuring liquids, gases, slurries and so on.
First, the temperature of the steam is relatively high. We have to choose a flowmeter that can withstand high temperature to measure. For example: V cone, orifice plate, balance, vortex street, turbine can all be measured. Among them, the measuring caliber of V cone flowmeter is from DN15-DN2000. The range is also relatively wide, so it is also favored by the majority of users.
When choosing a flowmeter, you should confirm the working conditions of the site, the temperature and pressure range, the power supply is generally 220VAC, the default installation method is flange installation, the output signal is 4-20mA, and the range diameter should also be confirmed.
There are many types of flowmeter, those suitable for steam and condensate applications include:
Orifice plate flowmeters.
Turbine flowmeters (including shunt or bypass types).
Variable area flowmeters.
Spring loaded variable area flowmeters.
Direct in-line variable area (TVA) flowmeters.
Ultrasonic flowmeters.
Vortex shedding flowmeters
Each of these flowmeter types has its own advantages and limitations. To ensure accurate and consistent performance from a steam or condensate flowmeter, it is essential that it is correctly matched to the intended application.
A wide variety of industrial Vortex shedding flow meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.
Sino-Inst is Vortex shedding flow meter suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Vortex shedding flow meter, also called Vortex flow meter. Vortex shedding flow meter is suitable for measuring steam flow rate as well as liquids and gases.
Vortex shedding flow meter, easy installation, low cost, analog and 4-20mA output. Pressure & temperature compensation can improve the sensor for more accurate measurement. Vortex shedding flow meter is suitable for measuring steam and various liquids and gases. When the fluid flows through the assembly line of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is directly proportional to the fluid velocity.
Vortex shedding flow meter reference price: USD 200-1500/pc.
Sino-Inst offers a variety of Vortex flow meters for flow measurement. If you have any questions, please contact our sales engineers.
Three-wire pulse output:≤300m, Two-wire standard current output:(4~20mA)≤1500m load resistance≤500Ω; RS485/HART≤1200m.
Vortex Shedding Flow Meter Structure
The basic structure of LUGB series vortex flowmeter is shown in figure 1. It is mainly composed of shell, vortex generator, flow sensor, temperature sensor, pressure sensor, shield bar, integrator and other main accessories
Vortex flowmeter is a speed-type flowmeter produced according to karman’s vortex principle, which can be used for the measurement and measurement of conventional gas, steam and liquid.
Vortex flow sensor has high precision and wide range ratio, no moving parts in use, which can improve mechanical stability and reduce maintenance.Vortex flowmeter is almost not affected by the temperature, pressure and composition of medium when measuring the volume of working condition.
Therefore, it is convenient to calibrate the instrument, so vortex street flow sensor is widely used in production and life.
When a trigonal column vortex generator is set in the fluid, regular vortices are generated alternately on both sides of the vortex generator, which is called Carmen vortex.
The vortex columns are arranged asymmetrically downstream of the vortex generator. Vortex flowmeter is produced according to this principle.
Vortexes are generated by generating bodies and the number of vortexes is detected by high-sensitivity sensors. In a certain range, the number of vortexes generated is proportional to the flow rate.
In vortex flowmeter, the relationship between flow rate and the number of vortexes generated can be expressed by the following formula：
Q：Operating volume flow of the measured medium. The unit is m3/h。 F：Frequency of the number of vortices produced by the generating body. The unit is Hz. K：Refers to the calculated or calibrated flow coefficient. It represents how many frequency signals per cube. the coefficient is usually obtained by calibration.
The formula of standard table method calibration coefficient K:
The formula can also be used for flow correction.
Applications of Vortex Shedding Flow Meter
Steam Flow Measurement
Steam has often been described as the ‘lifeblood’ of the industry. Vortex meters are known to be superior devices for steam flow measurement, due to their inherent linear measurement, large turndown, low-pressure drop, and high accuracy.
The vortex flowmeter is ideal for high temperature, superheated, and saturated steam applications, since it eliminates the need for separate components and associated installation temperature.
In addition, it provides quality, dependability and high-pressure ratings,along with a stable and reliable flow measurement.
Liquid applications in the oil refinery industry become challenging, since the process liquid is a higher viscosity at lower process temperatures.
As a result, clogging becomes an issue when a flow meter has moving parts.
Sino-Instrument vortex meters have advanced self-diagnostics, that alert the operator if clogging or plugging in the area around the shedder bar are present.
Alerts are also triggered in high-vibration environments and those with excessive flow fluctuations in the area around the shedder bar. This enables automatic condition-based maintenance.
A vortex flow meter is a flow measurement device best suited for flow measurements, where the introduction of moving parts presents problems.
They are available in industrial grade, brass or all plastic construction.
Sensitivity to variations in the process conditions are low, and with no moving parts have relatively low wear compared to other types of flow meters.
Vortex flow meters operate under the vortex shedding principle, where an oscillating vortexes occur, when a fluid such as water flow past a bluff (as opposed to streamlined) body.
The frequency that the vortexes are shed depend on the size and shape of the body.
It is ideal for applications where low maintenance costs are important.
Industrial size vortex meters are custom built and require appropriate sizing for specific applications.
The Vortex Shedding flow meter detects the vortices, that are created by a process medium going past a bluff body.
The frequency of these vortices can be equated into flow velocity, which, in turn, is used to calculate volumetric flow rate.
The integral temperature sensor is used in saturated steam service, to determine the operating conditions and specific volume of the steam being measured.
The steam table incorporated into the electronics, then calculates the flow or energy of the steam flowing through the meter.
The optional pressure sensor can be used for similar calculations, for gasses and superheated steam.
Intelligent Signal Processing (ISP) provides stable readings, free of external influences.
What are the applications of vortex flowmeter?
A vortex flowmeter can be used to measure the flow of various industrial water. Including chemical, light industry, electric power, metallurgy, building materials, petroleum and other industries in the production process of circulating water, wastewater, waste liquid measurement.
Part of the measurement of corrosive liquids, such as sulfuric acid, hydrochloric acid, nitric acid, acetic acid, and other acids. And a variety of chemical solutions.
The flow measurement of non-conductive liquids. Electromagnetic flowmeter in the flow measurement of conductive liquids dominates, while in the field of non-conductive liquid flow measurement, vortex flowmeter has a great place to use. In the petrochemical, pharmaceutical, food, semiconductor industry, vortex flowmeter has also been more widely used, for example methanol, formaldehyde, acetone, toluene, trichloroethylene, ethylene, butane liquid ammonia, etc., and semiconductor industry pure water and ultra-clean pure water, etc..
Part of the low viscosity oil flow measurement, such as gasoline, kerosene, diesel oil, and heavy oil and residual oil flow measurement after the viscosity has been reduced by heating.
Large diameter pipeline water flow measurement, full pipe vortex flowmeter is mainly used to measure small and medium diameter water flow, while the insertion type vortex flowmeter can be used to measure the flow measurement of large diameter pipeline. Vortex flowmeter is widely used in urban water pipelines and chemical, electric power, metallurgy, paper, and chemical fiber, and other enterprises in the industrial water mainline.
Sino-Instt offer over 10 Vortex Shedding flow meters, with Best Price.
A wide variety of industrial Vortex shedding flow meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.
Sino-Inst is Vortex shedding flow meter suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.
The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively. You can ensure product safety by selecting from a certified supplier, with ISO9001, ISO14001 certification.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Magnetic Water Flow Meter is an electromagnetic flowmeter used to measure conductive fluids. Conductive liquids such as drinking water, sewage, wastewater, seawater, ammonia, cement slurry, etc.
Magnetic Water Flow Meter provide highly accurate flow measurement for a wide variety of conductive fluid applications. Magnetic Water Flow Meter is a volumetric flow meter that measures liquids or liquid slurries that have a minimum conductivity of 5 µS/cm. Based on Faraday’s law of electromagnetic induction. Magnetic Water Flow Meter is ideal for wastewater applications or any dirty liquid which is conductive or water based. It is widely used in water treatment, environmental protection sewage measurement and control, papermaking and other industrial and agricultural production processes for flow measurement and control.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
Not affected by changes in fluid density, viscosity, temperature, pressure and conductivity. The linear measurement principle can achieve high-precision measurement;
There are no flow blocking parts in the measuring pipe. The pressure loss is small, and the requirements for straight pipe sections are low;
Nominal diameter DN6-DN3000 covers a wide range. There are many choices of lining and electrodes. It can meet the requirements of measuring a variety of conductive fluids;
The converter adopts programmable frequency low frequency rectangular wave excitation. It improves the stability of flow measurement and has low power loss;
The converter adopts 16-bit embedded microprocessor. Full digital processing, fast calculation speed. Strong anti-interference ability, reliable measurement. High accuracy, flow measurement range up to 1500:1;
High-definition backlit LCD display. Easy to use, simple to operate, easy to learn and understand;
With RS485 or RS232 digital communication signal output;
With conductivity measurement function, it can judge whether the sensor is empty or not. With self-check and self-diagnosis function;
Adopt SMD devices and surface mount (SMT) technology. High circuit reliability;
Can be used in corresponding explosion-proof occasions.
KLD electromagnetic water flowmeter can be used to measure the volume flow of conductive fluid in a closed pipeline. It is widely applied in the flow measurement and control in the fields of chemical and petroleum industry, metallurgy industry, water and wastewater, agriculture and irrigation, paper making, food and beverage industry and pharmaceutical industry.
The premise of using Magnetic Water Flow Meter is that the measured liquid must be conductive. The conductivity of the liquid cannot be lower than the threshold, the lower limit. If the conductivity is lower than the threshold, it will cause measurement error until it can not be used.
It can be measured even if the value exceeds the threshold, and the indication error does not change much. The threshold value of general electromagnetic flowmeter is between 10-4～(5×10-6)S/cm, depending on the model. It also depends on the length of the flow signal line between the sensor and the converter and its distributed capacitance. The product manual usually stipulates the signal line length corresponding to the conductivity.
The sewage treatment process is mainly through biological oxidation, flocculation, precipitation and other processes to achieve the purpose of sewage purification. At each stage, a certain gauge is needed to measure.
In the sewage industry, according to the characteristics of the corrosiveness, abrasiveness, temperature and condensation of the tested substance and the price tolerance. Different lining and electrode materials should be selected.
In the sewage treatment process, it is necessary to configure corresponding detection instruments according to the process requirements to form a reliable control system.
Generally, sewage treatment plants are equipped with flow meters in the following process inspection procedures:
Water inlet pipe.
Detection of mud volume from primary settling tank to mud storage tank.
Detection of surplus and sludge flow in the sludge pump room.
Detection of the return sludge flow in the sludge pump room.
Detection of the effluent flow of the secondary settling tank distribution well.
Detection of the sludge intake of the digestion tank.
Digestion tank Mud output detection. 8. Flocculation tank reagent input detection, etc.
Magnetic Water Flow Meter to Measure Industrial Water
The conductivity of industrial water and its aqueous solution is greater than 10-4S/cm. The conductivity of acid, alkali and salt solution is between 10-4～10-1S/cm, so there is no problem in use. Low distilled water is 10-5S/cm and there is no problem.
The electromagnetic flowmeter cannot measure liquids with very low conductivity. Such as petroleum products and organic solvents. Cannot measure gas, steam and liquids containing more and larger bubbles.
It is found from the data that some pure liquids or aqueous solutions have low conductivity and are considered unusable. However, in actual work, we will encounter examples that can be used because of impurities. Such impurities are beneficial to increase conductivity.
For aqueous solutions, the conductivity in the data is measured in the laboratory with pure water ratio. The actual aqueous solution may be proportioned with industrial water. The conductivity will be higher than found, which is also conducive to flow measurement.
1. A material with relatively stable chemical properties in plastics can withstand boiling hydrochloric acid, sulfuric acid and aqua regia, but also resistant to concentrated alkalis and various organic solvents, and is not resistant to chlorine trifluoride, high-flow liquid fluorine, liquid oxygen, and ozone. corrosion. 2. Poor wear resistance
Strong corrosive media such as concentrated acid and alkali
PFA
Corrosion resistance is the same as PTFE, strong resistance to negative pressure
Can be used in negative pressure state
F46
1. Corrosion resistance is the same as PTFE 2. Low abrasion resistance 3. Strong negative pressure resistance
1. Same as PTFD 2. Can be used for low-wear media
Neoprene
1. Excellent elasticity, high breaking force, good wear resistance 2. Resistant to the corrosion of a certain low concentration of acid, alkali, and salt media, and not resistant to the corrosion of oxidizing media
Water, sewage, ore slurry, weak abrasive mud
Polyurethane
1. Excellent abrasion resistance (equivalent to 10 times of natural rubber) 2. Poor acid and alkali resistance 3. Cannot be used for water mixed with organic solvents
Neutral and strong abrasion slurry, coal slurry, mud, etc.
Corrosion resistance of electrode material:
Electrode material
Corrosion resistance
SUS316
Used for industrial water, domestic water, and weak alkali corrosive media, Widely used in petroleum, chemical, urea, vinylon and other industries
Stainless steel coated tungsten carbide
For non-corrosive, strong abrasive media
Hastelloy B (HB)
It has good corrosion resistance to all concentrations of hydrochloric acid below the boiling point, and it is also resistant to sulfuric acid, phosphoric acid, hydrofluoric acid, organic acids, etc. Corrosion of oxidizing acid, alkali, and non-oxidizing salt solution
Hastelloy C (HC)
It is resistant to oxidizing acids, oxidizing salts or other oxidizing agents.
Titanium (Ti)
It is resistant to corrosion by sea water, various chlorides and hypochlorites, oxidizing acids, organic acids, alkalis, etc., but not resistant to corrosion by purer reducing acids. But if the acid contains an oxidant, the corrosion is greatly reduced
Tantalum (ta)
It has excellent corrosion resistance, which is very similar to glass, except for hydrofluoric acid, fuming sulfuric acid and alkali, it can withstand the corrosion of almost all chemical media.
Platinum-iridium alloy
Almost suitable for all chemical substances, but not suitable for aqua regia and ammonium salt.
The price of electromagnetic flowmeter is determined by the selection of electromagnetic flowmeter. The Magnetic Water Flow Meter reference price is USD550.00-3000.
The key questions which need to be answered before selecting a magnetic flow meter are:
Is the fluid conductive or water based?
Is the fluid or slurry abrasive?
Do you require an integral display or remote display?
Do you require an analog output?
What are the minimum and maximum flow rate for the flow meter?
What are the minimum and maximum process pressure?
What are the minimum and maximum process temperature?
Is the fluid chemically compatible with the flow meter wetted parts?
Sino-Inst offers over 50 magnetic water flow meter for flow measurement. About 50% of these are wastewater flow meters, 40% is the liquid flow sensor. And 20% are Ultrasonic Flow Transmitter and mass flow meter.
A wide variety of flow meters options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Orifice plate flow meter also called orifice flow meter or orifice plate. Orifice plate flow meter is a kind of differential pressure flow meter.
Orifice plate flow meter works together with an orifice plate, differential pressure transmitter, with Differential Pressure Measurement principle. Easy installation. Orifice plate flow meters can be used with gases, liquids, corrosive, and high temperature fluids. Orifice flow meters can measure steam, gas, liquids, and many industrial areas. Applications include steam flow, boiler feedwater, and fluid flow rates in building water lines.
Sino-Inst, Manufacturer for differential pressure flow meters. Including the Orifice plate, Venturi, Annubar, etc. Suitable for liquid, gas, and steam flow measurement. Please contact our sales engineers for technical support!
The structure of the throttling device is easy to copy, simple, firm, stable and reliable in performance, long in service life, and low in price.
Orifice flowmeter calculation adopts international standards and processing
Wide application range, all single-phase flows can be measured, and some mixed-phase flows can also be applied.
The standard throttling device can be put into use without real flow calibration.
The integrated orifice plate is simpler to install, no pressure pipe is needed, and it can be directly connected to a differential pressure transmitter and a pressure transmitter.
It has a wide range of applications, including all single-phase fluids (liquid, gas, steam) and partial mixed-phase flows. The pipe diameter and working conditions (temperature, pressure) of the general production process can be measured;
Orifice Plate Flow Meter Specification
SI-LG integrated orifice flowmeter is a high-range ratio differential pressure flow device. Composed of standard orifice plate and multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter).
It can measure the flow of gas, steam, liquid and natural gas, and is widely used in process control and measurement in petroleum, chemical, metallurgy, electric power, heating, water supply, and other fields.
Execution standard
Design, manufacture, and installation in accordance with international standard ISO5167-1(1991)(national standard GB/T2624-93), British standard BS1042 and other standards
Precision level
(1)Standard orifice plate, standard nozzle: there are many factors that affect the measurement error. If the installation and use meet the relevant provisions of international standard ISO5167-1 (1991), the accuracy level can generally reach level 1 ~1.5.
(2) For non-standard orifice plates (such as double orifice plates, circular missing orifice plates, small orifice plates, etc.). Due to insufficient test data, there is no “standard” to check, so calibration should be conducted after the design and manufacture is completed. (liquid flow is usually calibrated with water. And the air calibrates the gas flow. The level of accuracy (basic error) can be achieved after calibration: level 1 ~1.5, if not calibrated. Only by empirical data calculation, design, accuracy in ±2.5%.
Orifice plates are recommended for clean liquids, gases, and low-velocity stream flows.
Plate thicknesses depend on line size and differential pressure and should be sufficient, to prevent the plate from bending under operating conditions. Orifice plates can be made in accordance with customer drawings as required.
The Orifice meter is very cheap as compared to other types of flow meters.
Less space is required to Install and hence ideal for space-constrained applications
The operational response can be designed with perfection.
Installation direction possibilities: Vertical / Horizontal / Inclined.
Orifice Flow Meter Applications
Natural Gas
Water Treatment Plants
Oil Filtration Plants
Petrochemicals and Refineries
Orifice Plate Orifice flow meter diagramorifice flow meter diagram
Of course, in the water supply or wastewater treatment industry, in addition to orifice flowmeters, electromagnetic flowmeters are also the first consideration for many users in the measurement of water flow. For example, if you need to measure the flow of wastewater in a 2-inch pipe. Then you may refer to: Magnetic Flow Meters Guides.
1. Meter manifold piping should always be installed to enable calibration as well as to protect the differential element against overage.
2. The meter should be installed as close as possible to the orifice fitting.
3. Always slope the manifold lines gently from the orifice fitting to the meter to eliminate any high or low points in the manifold lines.
4. Use condensate chambers or air traps to remove either liquid from a gas system or gas from a liquid system if lows or highs in the manifold piping cannot be avoided.
It is important when pressurizing or depressurizing differential measuring devices to apply or release pressure to or from the high and low meter chambers uniformly, so as not to impose excessive overage.
What is an Orifice Meter?
An orifice meter is a conduit and a restriction to create a pressure drop.
An hourglass is a form of the orifice.
A nozzle, venturi or thin sharp-edged orifice can be used as the flow restriction.
In order to use any of these devices for measurement, it is necessary to empirically calibrate them.
That is, pass a known volume through the meter and note the reading in order to provide a standard for measuring other quantities.
Due to the ease of duplicating and the simple construction, the thin sharp-edged orifice has been adopted as a standard and extensive calibration work has been done, so that it is widely accepted as a standard means of measuring fluids.
Provided the standard mechanics of construction are followed no further calibration is required.
The minimum cross-sectional area of the jet is known as the “vena contract”.
How does an orifice flow meter work?
I guess most people wondered: What is the working principle of orifice meter?
As the fluid approaches the orifice the pressure increases slightly and then drops suddenly as the orifice is passed.
It continues to drop until the “vena contract” is reached, and then gradually increases, until at approximately 5 to 8 diameters downstream, a maximum pressure point is reached, that will be lower than the pressure upstream of the orifice.
The decrease in pressure as the fluid passes thru the orifice, is a result of the increased velocity of the gas passing thru the reduced area of the orifice.
When the velocity decreases as the fluid leaves the orifice the pressure increases, and tends to return to its original level (To level transmitters).
All the pressure loss is not recovered because of friction, and turbulence losses in the stream.
The pressure drop across the orifice increases when the rate of flow increases.
When there is no flow there is no differential.
The differential pressure is proportional to the square of the velocity, it thus follows that if all other factors remain constant, then the differential is proportional to the square of the rate of flow.
Converters for conversion and calculation of flow. Or a calculation tool that requires flow measurement to obtain other measurement parameters. Help users choose the right flow sensor and transmitter!
Venturi flow meter is also called classical venturi, and is used to call venturi meter, standard venturi. It is used to measure the flow of single-phase stable fluid in closed pipelines.
Venturi flow meter is a flow measurement method based on the principle of differential pressure. Commonly used to measure the flow of fluids such as air, natural gas, coal gas, and water. In the standard throttling device, the upstream and downstream straight pipe sections required by it are short. The lasting pressure loss is small, the performance is stable, and the maintenance is convenient.
What is the difference between Venturimeter and orifice meter?
The difference between venturi flowmeter and orifice flowmeter:
Orifice flow meters and Venturi flow meters are very different in many aspects.
In order to reduce the loss of the kinetic energy of the fluid mechanics flowing through the saving components, the Venturi flowmeter uses each section of tapered and divergent tubes to replace the orifice.
The orifice flowmeter is equipped with an interchangeable orifice plate with a small circular hole on the upper side, which is much smaller than the diameter of the pipe. The orifice plate is placed on the side of the fluid mechanics pipe.
1.The orifice flowmeter is similar to the Venturi flowmeter in the working principle. But some of the main differences are: the orifice plate can be easily replaced to accommodate a wide range of different flow rates.
The throat diameter of the venturi is fixed, so that the measured flow rate range is limited by the actual pressure difference.
Due to the vortex on the downstream side of the orifice, the permanent loss of the orifice flowmeter is very large.
The structure and shape of the Venturi flowmeter can avoid the formation of vortices, which can greatly reduce permanent losses.
2.The energy loss of Venturi flowmeter in measuring flow is much smaller than that of orifice flowmeter. However, because the venturi flowmeter is more time-consuming in manufacturing and processing than the orifice flowmeter, and the price is high, the orifice flowmeter has the least trouble and the lowest cost during pipeline installation.
3.In terms of fluid measurement, Venturi flowmeters are generally used for low-velocity gas flow measurement.
The flow coefficient of the orifice plate in the orifice flowmeter is significantly affected by the fluid disturbance, and this disturbance comes from the influence of the valves, elbows and other pipe fittings installed upstream of the orifice plate. The value of its discharge coefficient is less affected by downstream disturbances. Generally, this kind of flowmeter should be installed at a distance of 50 times and 10 times the pipe diameter from the upstream and downstream disturbance components, respectively. Obviously the required distance is related to the nature of the disturbance.
Therefore, when measuring with an orifice flowmeter, the orifice flowmeter must be installed correctly according to the disturbance of the fluid.
The above is a detailed introduction to the question of “What is the difference between a venturi flowmeter and an orifice flowmeter”, I hope to help everyone. If you have any other questions about this issue, please click Online Consultation and consult online customer service.
Orifice Meter is a liquid and gas flow measuring instrument. It is mainly used in high temperature and high pressure measurement conditions. Orifice Meter has the characteristics of high temperature resistance, the temperature can reach 700 degrees, and the pressure is 30MPa. In the field of high temperature and high pressure measurement, Orifice Meter is Use more differential pressure flowmeters.
What is the calibration accuracy of the orifice flowmeter? The orifice flowmeter is a flow measuring instrument. The accuracy of the orifice flowmeter is within the range of ±0.5% to 1.5%. The orifice flowmeter has the characteristics of high temperature and high pressure. It is mainly used to measure steam and hot air. , Measurement conditions of heat transfer oil.
DP transmitters are Differential Pressure Transmitters. DP transmitter measures the pressure difference between the gas or liquid at both ends of the transmitter. Output 4~20mA, 0~5V. Used for liquid level, density and pressure of liquid, gas and steam.
DP transmitters are different from pressure transmitters as they have 2 pressure interfaces. With flanges, capillaries, valve, brackets, throttle devices. Differential pressure transmitters are used to measure the level, density, and flow of liquids, gases, and vapors. Then convert it into 4–20mADC current signal output.
What is Digital Flow Meter for Argon Gas? Digital flow meter for argon gas refers to a flow meter that can be used for detection, display, transmission, and signal output…
What is a BTU Meter? A BTU meter is a special instrument that measures the thermal energy transferred in a heating or cooling system. BTU meters are also known as…
What is PD flow meter? PD flow meters (positive displacement flow meters) are the only flow measurement technology that directly measures the volume of fluid passing through the flow meter.Rotating…
Digital Fuel Flow Meter is a flow meter dedicated to measuring fuel, diesel, gasoline, and petroleum. Digital Fuel Flow Meter generally has a digital display or signal output. Such as…
Fuel Flow Meter for Boat refers to a flow meter dedicated to measuring marine fuel. There are many types of marine fuel oil. Mainly include light diesel, heavy diesel, fuel…
Water flow measurement is common in both industry and life. You may often hear about the use of electromagnetic flowmeters to measure wastewater. The clamp-on ultrasonic flowmeter measures large water…
Mechanical water flow meters refer to a type of flow meter suitable for clean water processes or applications. The working principle of a mechanical water flow meter is to measure…
A flow totalizer meter is sometimes referred to as a flow meter or flow totalizer. flow totalizer meter displays the flow rate from either an analog or pulse output flow…
Flow Meter Types There are many types of flow meters. Basically, there are the following types of flow meters Why are there so many types of flow meters? This starts…
What is Strap on Ultrasonic Flow Meters? Strap on Ultrasonic Flow Meter is also often called Clamp On Type Flow Meter. The unique feature of Strap on Ultrasonic Flow Meter…
What is 4-20ma Flow Meter? 4-20mA Flow Meters are those flow meters with 4-20mA current signal output function. The signal current of general instruments is 4-20mA. This means that the…
Sino-Inst offers 12 orifice plate flow meter products. About 90% of these are flow meters.
A wide variety of orifice flow meter options are available to you, such as brass, carbon steel. You can also choose from free samples.
Sino-Inst is an orifice plate flow meter supplier. Orifice plate flow meter products are most popular in Domestic Market, Southeast Asia, and Mid East.
You can ensure product safety by selecting from certified suppliers, including 375 with ISO9001, ISO14001, and Other certification.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
