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 pulse or 4-20mA. Such as turbine flow meters, gear flow meters. It can be used to measure the pipeline flow of oil medium storage, transportation, trade, etc. Different pipelines and working conditions require flow meters with different principles or functions. Next, we will analyze in detail.
The digital diesel fuel flow meter comes with a large LCD display which is convenient for clear reading. Another display method of Diesel fuel flow meter is the dual display of pointer and word wheel instantaneous cumulative count. Now it also supports electronic digital display, which makes the instantaneous and cumulative flow more intuitive. In the case of electronic digital display flowmeter mode, it can also realize the on-site online data remote transmission function to support different signal output modes. The pointer plus the word wheel display and the electronic digital display can be applied to more on-site working conditions and are widely used and recognized.
As a commonly used energy source in industrial production, diesel oil needs to be metered in many occasions. For pipeline transportation of oil tankers or diesel storage tanks, it is more suitable to select a flow meter with higher measurement accuracy to measure. Because not only to facilitate trade settlement. And it needs to be accurate. The measurement is accurate. Can be used for a long time.
The intelligent liquid turbine flowmeter is a new type of intelligent instrument that integrates the turbine flow sensor and display integration, which is developed by using advanced ultra-low power single-chip microcomputer technology. It has a compact structure, intuitive and clear reading, and high reliability. Not subject to external power supply. Obvious advantages such as lightning resistance and low cost.
Turbine Digital Flow Meter is widely used to measure the corrosion of stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, and cemented carbide in closed pipelines, and there is no fiber, particles and other impurities. Liquids with kinematic viscosity less than 5×10-6m2/s at working temperature, and liquids with kinematic viscosity greater than 5×10-6m2/s. The flowmeter can be used after real liquid calibration. If matched with a display instrument with special functions. It can also carry out quantitative control, over-quantity alarm, and so on. It is an ideal instrument for flow measurement and energy saving.
Most widely used types are mechanical and digital inline fuel meters. Differential flow sensors are available. Like: the turbine, positive displacement (oval gear), Coriolis, and differential pressure flow meters.
Marine fuels mainly include light diesel, heavy diesel, fuel oil, and residual fuel oil.
To put it simply, if the tested marine fuel is a low-viscosity, clean fuel. Then you can choose a turbine flowmeter. The price is reasonable and the measurement is stable.
If the marine fuel being tested is heavy oil, high-viscosity fuel. Then it is recommended to choose an oval gear flowmeter.
If the measured marine fuel is a small flow rate. Then it is recommended to use a circular gear flowmeter for measurement.
If the tested marine fuel has impurities. It is recommended to install a filter before the flowmeter.
If you still do not know how to choose the right marine fuel flow meter. You can contact our sales engineer. We will provide you with a suitable marine fuel flow measurement program.
Volumetric Flow Meter, as a mechanical flow meter, is also called Positive displacement flowmeter. It can measure the volume flow of high viscosity and corrosive fluids.
Volumetric Flow Meter is a mechanical instrument used to measure the volume flow of fluids. A volumetric flow meter is an instrument which can measure either directly or indirectly the volume of a substance which is passing through a specific location in a set period of time. The main advantage of these types of flow meters is that they can handle high viscosity and corrosiveness fluid.
Electronic flow meters are industrial digital flow meters for fluid flow rate measurement. In more cases, people will default that Electronic flow meters are electromagnetic flowmeters.
Electronic flow meters types like Magnetic, Vortex, and Ultrasonic flow meters. Electronic flow meters are suitable for Industrial liquid, water, natural gas, petrol, fuel, air, and more fluid flow. Electronic flowmeters convert the monitored fluid flow into electronic signals. Including pulse signal, 4-20mA standard signal, etc.
Sino-Inst offers a variety of Electronic flow meters for flow measurement. If you have any questions, please contact our sales engineers.
There is also a compact electronic turbine flowmeter. It is widely used for small-caliber measurements of gasoline, diesel, water, methanol, alcohol, etc.
GPI is a registered trademark of Great Plains Industries, Inc. of the United States. It has been producing turbine and oval gear flow meters for more than 30 years.
The headquarters of American GPI is located in Wichita, Kansas, USA. It is a global professional manufacturer of fluid transportation and measurement. Relying on its strong product development capabilities and complete turbine and elliptical gear flowmeter production lines and product testing lines. After more than 30 years of development, it has won the support and trust of more and more customers around the world.
In China, GPI products have been widely used in the chemical, oil, pharmaceutical, food and beverage, water treatment, and automotive equipment manufacturing industries.
GPI mainly produces two categories of products: ▲ GPI turbine flowmeter, oval gear flowmeter; ▲ GPI fluid delivery and storage system, including manual pumps, electric pumps, etc.
There are many types of flow meters on the market, and the prices are different. There are so many brands at home and abroad, it is easy to get confused. So how should we choose the right flow meter?
To put it simply, we should start from the actual measurement conditions when choosing a flow meter. Combine installation requirements, monitoring requirements, and budget costs. In order to choose the most suitable Digital Fuel Flow Meter for you.
Look at the condition of the fluid. Including fluid viscosity, corrosivity, etc. For example, for high-viscosity oils, gear flow meters are recommended. For low viscosity, turbine flowmeters can be used.
Flow rate range. Minimum flow, maximum flow. Common flow.
Pipeline diameter. The inner diameter, outer diameter, wall thickness, etc. of the pipe. Determine the caliber of the flowmeter according to the flow rate and the size of the industrial pipe. Generally, the flow meter that is consistent with the pipeline is selected. If the flow range does not meet, then operations such as necking can be considered.
The temperature of the medium. For example, in the case of ultra-high temperature, the material and structure of the flow meter need to be changed.
Pipeline pressure. Select the pressure level of the flanges connected on both sides according to the pressure level of the process pipeline. According to the different materials of the flowmeter in contact with the liquid, the pressure resistance is different, and the pressure resistance range of stainless steel and copper is larger. If the flow rate is relatively low, pressure loss needs to be considered. In this case, turbines and positive displacement flow meters are not suitable.
Signal output. If signal output is not required, rotameter and mechanical water meter are generally sufficient. The output signal has analog quantity (4-20ma, 0-10 v) and pulse output, these flowmeters can have digital display.
If you sort the above parameters, you don’t know which flowmeter you should choose. Then, you can contact Sino-Inst sales engineer. We will select the appropriate digital fuel flow meter according to your requirements.
Different digital flow sensors include turbine, thermal mass, electromagnetic, ultrasonic, orifice plate, venturi. The different designs of the flowmeters have a variety of applications. With 4-20ma, RS485, or other output.
Then they all work differently. However, they can convert the flow signal into a digital display, or pulse, or 4-20mA signal.
What is a fuel flow meter? The fuel flow meter is an instrument that can monitor fuel flow. Industrial Fuel is an important energy source. For example, diesel, marine fuel, gasoline, etc.
A diesel Flowmeter is a kind of positive displacement Meter to measure the liquid flow or instantaneous flow of the Pipe tube. lt is a kind of accumulated meter. With Characteristics of high accuracy, small change by the fluid Viscosity, it is widely used to measure oil kind liquid, forbidden to measure corrosive.
Currently, the digital flow meters provided by Sino-Inst support flange installation, threaded installation, plug-in installation or external clamp installation. Different flow meters have different installation requirements.
Sino-Inst’s Digital Fuel 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.
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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.
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 the speed of water flowing through a pipe. This causes the piston or turbine to rotate. The volume flow of water is proportional to the rotation speed of the blades. Compared with electronic water flow meters, mechanical water flow meters may become clogged when the water is dirty or contains large particles. When the water flow is low, the mechanical water meter does not work well.
Mechanical Water Flow Meters VS Mechanical Water Meters
Water meter and flow meter are two products with different standards. The focus of the two is also different.
The water meter implements the national standard, and the flow meter implements the industry standard. Water meters require higher requirements than flow meters. Water meters focus on wide-range measurement. And flow meters are suitable for fluid measurement with stable flow rates. Water meters are only used in the water industry, while flow meters are used in major industrial and civil industries. In terms of application range, electromagnetic flowmeters have a wider application range than water meters. However, because the upper and lower limits of flowmeters are relatively narrower than water meters. Water meters are often used in the water industry.
Mechanical flow meters are a type of flow meters that use arrangement moving parts to measure flow. The fluid passes through a series of gears or chambers (positive displacement or PD) or through a rotating turbine or rotor. The mechanical flowmeter is different from electromagnetic and ultrasonic in principle. Mechanical flow meters easily monitor liquid flow rates for water, fuels, viscous fluids and more.
Mechanical water meters have been used by us to measure water consumption for decades. In recent years, with the introduction of smart water, smart city policies. Relevant departments and the water department advocate the use of smart water meters. Smart water meters are widely used. There are still many areas using machinery. Water meters need to be replaced. Smart water meters still have a lot of room for the replacement.
The working principle of the mechanical water meter is that the water flow is driven by the impeller to drive the electromechanical water meter quantitatively. Its function and performance are far from being able to meet the growing technological construction. The disadvantages of the mechanical water meter:
Must use water of similar quality to tap water. And the liquid must not contain rust, gravel, aquatic plants, and other impurities; It is more difficult to manufacture products with a high range ratio. The range ratio of traditional mechanical water meters is usually less than 80; Mechanical water meters use impeller gears and other mechanical rotating parts for measurement. The longer the use time, the lower the measurement accuracy; The pressure loss is great. Single installation must be strictly horizontal or vertical installation.
For users, the “intelligent water meter” is a tap water meter with remote transmission function.
Water flow meters are flow meters that can diaplay the flow rate of industrial water pipe.
A water flow meter measures the amount of water flowing through a pipe. We have several kinds to choose from, depending on the application, maintenance needs, and budget.
Turbine (also called mechanical), Vortex, Ultrasonic, and Magnetic. We will tell you everything you need to know about them and help you choose one for your application.
First, you should know the flow meter working principles.
Compared with other flow meters, the mechanical flowmeter relies on the rotation and displacement of mechanical parts to measure the flow rate. Common mechanical flow meters have the following categories.
A positive displacement flowmeter as a mechanical flow meter is a common type of Volumetric Flow Meter. It can measure the volume flow of high viscosity and corrosive fluids.
Volumetric flow meter working principle
The positive displacement flow meter is a flow meter that uses mechanical measuring elements to continuously divide the fluid into a single known volume, and repeatedly fill and discharge the volume of fluid to accumulate the total amount of fluid.
A Rotameter flow meter is a variable area flow meter based on float position measurement. It is suitable for liquid and gas volumetric flow measurement and control.
Rotameter flow meter working principle
When the measured fluid passes through the annulus formed by the cone and floats from the bottom to the top. The differential pressure produced at the upper and lower ends of the float forms the force for the float to rise. Until the rising force equals the weight of the float immersed in the fluid, the float will stabilize at a certain height. The height of the float in the tapered tube and the flow rate through it correspond to each other.
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.
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.
The gear flow meter is a micro digital positive displacement flow meter. Can measure very small flow rates and quantify small volumes of liquid. High and low-temperature resistance (-196℃-200℃).
With the flow of the medium, the gears mesh and rotate. Under the action of the fluid flow, a pressure difference is formed at both ends of the instrument inlet and outlet. There is no need for power supply. A pair of gears rotate freely. The cavity between the gears is filled with liquid. Discharge and measure the number of revolutions of the gear to know the flow of liquid and liquid flowing through the instrument.
A common mechanical flow meter is inserted into the pipe and uses a turbine, wheel, or paddle to measure the speed. Then calculate the volume flow by knowing the cross-sectional area of the pipe in which they are installed. A common type of the above-mentioned mechanical flow meter uses a turbine. It rotates as the water flow applies force to the blades. The rotation of the turbine is proportional to the speed of the fluid flowing through it. Once the speed is known, the flow rate can be calculated.
Other mechanical watches use the same basic mechanical principles to measure flow. They operate effectively in full pipelines and when used in areas with the stable flow and almost no turbulence. Mechanical flow meters will operate in all types of liquids. However, it is prone to clogging and performance degradation due to the accumulation of solids on the turbine blades. They also block part of the flow and require regular maintenance of gears and moving parts.
Mechanical Type Flow Meter is a type of flow meter. The mechanical flowmeter is a purely mechanical measuring component. Such as turbine flowmeter, rotameter, etc.
Compared with other flow meters, the mechanical flowmeter relies on the rotation and displacement of mechanical parts to measure the flow rate. Common mechanical flow meters are Positive displacement flow meter; Variable area flowmeter; Turbine flowmeter; Gear flow meter.
The two instruments also measure the flow of liquid in the pipeline, so what is the difference between them?
Many users ask why it is so expensive when they ask about the flowmeter. So let’s first talk about the difference in price. The price of flow meters is much higher than that of water meters. The price with high precision and large-diameter are higher. The price of a water meter is much lower, basically, you can buy it for tens of dollars. The higher price is only three to four hundred yuan.
Of course, the price difference between them is so big, the function is definitely very different. In addition to measuring the instantaneous flow of liquid, the flow meter. It can also measure the cumulative flow. And the flow data can be output to the secondary meter. Convenient statistics and management. These are things that water meters cannot do.
The water meter is in cubic units, while the flow meter can be in cubic or liter units. The unit of liters means that the flowmeter is more accurate and detailed, and is more suitable for factory production and trade requirements.
Sino-Inst is a globally recognized supplier and manufacturer of mechanical water flow meters, located in China.
The top supplying country is China (Mainland), which supply 100% of the mechanical water flow meter respectively.
Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Mechanical water flow meter products are most popular in Domestic Market, Southeast Asia, and Mid East.
You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.
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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.
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 sensor as well as the accumulated total and grand total volume over time. Flow meters are devices used to measure the flow rate or quantity of a gas or liquid in a pipe. The flow totalizer meter works on the basis of a flow sensor. It shows the data results that people want.
Sino-Inst offers a variety of Record and Analyze instruments for industrial control. Hope that through the introduction of this article, you can learn more about Flow Totalizer Meter vs Flow Meter. To help determine the right product for your project.
Totalizer is a meter that can display the measured cumulative value from a certain specified time to the reading time.
In the central processing unit. The accumulator is a type of register. Used to store intermediate results produced by calculations. If there is no register like the accumulator, then after each calculation (addition, multiplication, shift, etc.), the result must be written back to the memory. Maybe I have to read it back soon. However, the speed of access to the main memory is slower than the access from the arithmetic logic unit to the accumulator with a direct path.
In the arithmetic unit, the accumulator is a register dedicated to storing an operand and the result of an arithmetic or logical operation. It can perform operations such as addition, subtraction, reading, shifting, cyclic shifting, and complementation. It is the main part of the arithmetic unit.
In the central processing unit CPU, the accumulator (accumulator) is a kind of scratchpad. It is used to store intermediate results produced by calculations. If there is no register like an accumulator. Then after each calculation (addition, multiplication, shift, etc.), the result must be written back to the memory, and then read back. However, the speed of access to the main memory is slower than the access from the mathematical logic unit (ALU) to the accumulator with a direct path.
In assembly language programs, the accumulator-AX is a very important register. But when it is used to save temporary data in the program. Finally, it is transferred to other registers or memory units. To prevent the data in it from being modified during the execution of other instructions. In order to get incorrect results. Bring unnecessary trouble to the debugging of the program.
The flowmeter is defined as an instrument that indicates the measured flow rate and/or the total amount of fluid in the selected time interval. Simply put, it is an instrument used to measure fluid flow in pipes or open channels.
Flow meters are divided into differential pressure flow meters, rotor flow meters, throttling flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, ultrasonic flow meters, and so on. Classified by medium: liquid flow meter and gas flow meter.
Simply put, a Totalizing Flow Meter is a running total of how much fluid (gas, liquid, steam) has passed by the sensor within a given time. For example, “in the last 60 seconds, there have been 30 gallons of water flowing by the sensor.”
Usually, flow meters measure instantaneous flow. If you need to know the total amount of flow, you need to use a totalizer.
A complete flow detection system includes several parts such as sensing, transmission, calculation, integration, display, etc. Each part can be an independent instrument. It is also possible to integrate several functions into one watch.
Many flow totalizers on the market now integrate calculation, totalization, and display. It includes most of the functions of the flow system. Some manufacturers set the totalizer and other parts as flow meters and use the name of the complete set on the totalizer. If you buy the totalizer alone, you will see that the name is flowmeter.
So the flowmeter [maybe] includes a totalizer, but the totalizer is not a flowmeter.
If you get here, you still can’t find a suitable product. Then let us take a more detailed look at the functions and applications of the Flow Totalizer Meter.
Flow Totalizer Working Principle
The flow totalizer is composed of four parts: measurement loop, digital panel meter, regulator, and power supply.
The stabilized power supply converts the 220V power supply into a stable DC voltage as the other part of the power supply.
The measurement loop processes the signal (voltage, current, etc.) sent by the flow transmitter into a voltage signal.
After A/D conversion, the signal is sent to a dedicated central processing unit for processing. Not only to the digital panel meter but also to the regulator. After comparing with the set value, it outputs a control or alarm signal according to the regulation rule.
The water flow meter is an instrument specially used to measure the flow of water in pipes. You can get many different types of water flow meters from your facility.
When used in certain applications, each flow meter has its own advantages. For many pipelines and similar systems, the water must be maintained at a specified flow rate to ensure the effective operation of the system.
Water flow meters supplied by Sino-Inst are flow meters that can display the flow rate and cumulative flow of industrial water pipes. Read more about: 5 Types of Flowmeters-Guide to Flowmeter Types .
Digital gas flow meters are flow meters used to monitor the gas flow rate or mass. Digital gas flow meters are designed to measure different types of gases. Like Air, N2, O2, CO2, and more.
The Digital gas flow meters supplied by Sino-Inst all come with Gas Totalizer, so they are also called Gas Totalizer Flow Meter. Such as gas ultrasonic flowmeter, gas turbine flowmeter, etc.
The intelligent gas flow converter is a new type converter with domestic level developed by our company. Adopt advanced ultra-low power consumption single-chip microcomputer technology. The whole machine has strong functions, low power consumption, and superior performance. The flowmeter integrates flow, temperature, and pressure detection functions. And can automatically compensate for temperature, pressure, and compressibility. It is an ideal instrument for gas measurement in petroleum, chemical, electric power, metallurgy, and other industries.
Flow totalizers are often used in conjunction with flow meters. According to the definition of flow totalizers matched with flow meters, it is like this: with various flow sensors or transmitters, temperature sensors or transmitters and pressure transmitters Coordinated use. It can measure and display, accumulate calculation, alarm control, transmission output, data acquisition and communication for various liquid, steam, natural gas, general gas and other flow parameters. It is a very important accessory instrument for flowmeters. It can be seen that the important role of the flow totalizer.
At present, there are many different brands of flow totalizers used to measure the instantaneous flow of liquid or solid in the industrial field. Then it is transmitted to the PLC through a 4-20mA signal as a data standard for control or monitoring. PLC accumulates the cumulative flow within a certain period of time according to the instantaneous flow. It is of great significance for the data analysis and production calculation applications of a liquid or solid flow in the field of process industry control.
Generally, flowmeters have system errors, fixed constants need to be compensated and corrected. There are many types of flowmeters, the principles of various measurement methods are different, the measured medium is different, and the compensation calculation is also different.
For example, the flow meters in the following measurement occasions require temperature or pressure compensation:
When measuring gas, temperature and pressure compensation are required at the same time. The gas is generally settled at the standard condition volume flow rate. Because the volumetric flow rate of gas changes when temperature or pressure changes, the flow rate will change.
When measuring superheated steam, the temperature and pressure need to be compensated at the same time. Steam is generally settled by mass flow rate. Because either temperature or pressure has changed. The density of the steam will change. The mass flow rate also changes accordingly.
Sino-Inst offers over 50 Flow Totalizer Meter & Flow Meter for flow measurement. About 50% of these are differential pressure flow meters, 40% is the liquid flow sensor, and 20% are Ultrasonic Level Transmitter and mass flow meters.
A wide variety of Flow Totalizer 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.
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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.
An oil and Gas Flow Meter is A device installed in a pump manifold or treating line to measure the fluid flow rate. Oil and Gas Flow Meters can be used to measure the flow rates of liquid or gas and are available in various configurations and with different operating principles.
Every day, a large amount of oil and gas are transported back and forth, refined, and then transported, as well as custody transfer. Difficult oil and gas flow measurement challenges such as corrosive media and harsh environments are our daily work. This requires mature and safe technology. Through instrument measurement and display monitoring, safe and reliable operation can be achieved.
Many types of flow meters are used to measure oil and gas flow. Each type has its advantages and disadvantages. The following content discusses these advantages and disadvantages.
A Coriolis flowmeter is a type of mass flow meter. It is designed differently and works differently than thermal or differential mass flow meters. Coriolis meters provide extremely accurate mass or volume flow, density, and temperature measurement with few moving parts and no straight pipe requirements.
Coriolis flowmeter is also called Coriolis mass flow meter. Based on the principles of Micromotion mechanics. Coriolis meters provide extremely accurate mass or volume flow, density, and temperature measurements.
It can measure a wide range of fluids, including high-viscosity liquids, slurries containing solids, liquids containing trace gases, and medium and high-pressure gases with sufficient density.
The measuring tube has a small vibration amplitude and can be regarded as a non-moving part, and there are no obstructions and moving parts in the measuring pipe.
It is not sensitive to the flow velocity distribution of the upflow, so there is no requirement for upstream and downstream straight pipes.
The measured value is not sensitive to the fluid viscosity, and the change of fluid density has little effect on the measured value.
Multi-parameter measurement can be done, such as measuring density at the same time, and deriving the concentration of solute in the measurement solution from this.
Disadvantages
The instability of the zero point of the Coriolis mass flowmeter forms a zero point drift. This affects the further improvement of its accuracy. Many types of meters have to divide the total error into two parts, the basic error and the zero point instability measurement.
Coriolis mass flowmeters cannot be used to measure low-density media and low-pressure gases. The gas content in the liquid exceeds a certain limit (depending on the model), which will significantly affect the measured value.
Coriolis mass flowmeters are more sensitive to external vibration interference. In order to prevent the influence of pipeline vibration, most models of Coriolis mass flowmeters have high requirements for installation and fixation of flow sensors.
The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.
Transit time ultrasonic flow meter is most suitable for measuring the flow of cleaning liquid. Therefore, it is the most popular type of ultrasonic meter.
Doppler ultrasonic flow meter can measure the frequency difference of sound waves reflected from bubbles or particles in the airflow. It is suitable for aerated or dirty liquids.
Advantages
The clamp-on ultrasonic flowmeter can realize non-contact flow measurement. Even if it is a plug-in or internally attached ultrasonic flowmeter, its pressure loss is almost zero. The convenience and economy of flow measurement are the best.
The ultrasonic flowmeter can measure various media of water, gas and oil. Its application field is very broad.
The manufacturing cost of the ultrasonic flowmeter has almost nothing to do with the caliber. It has the comprehensive competitive advantage of reasonable price and convenient installation and use in the occasion of large-diameter flow measurement.
The portable ultrasonic flowmeter can measure the flow rate on pipelines of various pipe diameters and materials with one flowmeter. It is the preferred flow meter type for online calibration, comparison or period verification as a standard meter.
Ultrasonic flowmeter has the convenience of traceability based on the two basic physical quantities of length and time. It can be foreseen that it will surpass other principles of flow meters to become the carrier of flow standards or even flow standards.
The current disadvantage of ultrasonic flowmeters is mainly that the temperature range of the measurable fluid is limited by the temperature resistance of the ultrasonic transducer and the coupling material between the transducer and the pipeline. And the raw data of the sound transmission velocity of the measured fluid at high temperature is incomplete. At present, our country can only be used to measure fluids below 200°C.
The anti-interference ability is poor, and it is susceptible to the influence of bubbles, fouling, pumps, and other ultrasonic noises, resulting in poor accuracy. If the above situation occurs, the accuracy will deteriorate in the slightest, and the meter will not display in the severe case.
The measurement circuit of the ultrasonic flowmeter is more complicated than that of the general flowmeter. This is because the flow velocity of liquid in general industrial measurement is often a few meters per second, and the propagation speed of sound waves in the liquid is about 1500m/s.
A vortex flow meter is also called a Vortex shedding flow meter. Vortex Flow Meter is suitable for flow measurement of steam and various liquids and gases.
The vortex flowmeter is a volume flow meter that measures the volume flow of gas, steam, or liquid, the volume flow of standard conditions, or the mass flow of gas, steam, or liquid based on the Karman vortex principle. When the fluid flows through the dust collector rod of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is proportional to the fluid velocity. Temperature and pressure compensation can be configured.
Advantages
The vortex flowmeter has no moving parts, and the measuring element has a simple structure, reliable performance and long service life.
The vortex flowmeter has a wide measuring range. The turndown ratio can generally reach 1:10.
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.
The pressure loss caused by it is small.
The accuracy is high. The repeatability is 0.5%. And the amount of maintenance is small.
The volume flow of the vortex flowmeter in working state is not affected by thermal parameters such as the temperature, pressure, and density of the fluid being measured. But the final measurement result of liquid or steam should be mass flow. For gases, the final measurement result should be the standard volume flow rate. Both the mass flow rate or the standard volume flow rate must be converted by fluid density, and changes in fluid density caused by changes in fluid working conditions must be considered.
Poor vibration resistance.
Poor adaptability to measuring dirty media. The generating body of the vortex flowmeter is easily dirty by the medium or entangled by the dirt. Change the size of the geometry. Greatly affect the measurement accuracy.
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.
Poor temperature resistance. Vortex flowmeters generally can only measure the fluid flow of media below 300°C.
A thermal gas mass flow meter is a flow meter that can detect the mass flow of gas without temperature and pressure compensation.
Thermal Mass Flow Meter Unaffected by changes in viscosity, density, temperature, or pressure. Thermal mass flow meters are designed based on the principle of thermal diffusion.
Including natural gas, coal gas, liquefied gas, flare gas, argon, carbon dioxide, and other mixed gas flow measurement.
Advantages
Wide turndown ratio. It can measure gas with flow velocity as high as 100Nm/s to 0.5Nm/s. Can be used for gas leak detection.
Good seismic performance and long service life. The sensor has no moving parts and pressure sensing parts, and is not affected by vibration on the measurement accuracy.
Easy to install and maintain. If site conditions permit, installation and maintenance can be achieved without stopping production. (Need special customization)
Digital design. Integral digital circuit measurement, accurate measurement and convenient maintenance.
Using RS-485 communication, or HART communication, factory automation and integration can be realized.
Disadvantages
The response is slow, and the measured gas composition changes greatly, and the measured value will change greatly due to the change of cp value and thermal conductivity, which will cause errors.
For small flow rates, the meter will bring considerable heat to the gas being measured.
For thermally distributed thermal gas mass flow meters, if the measured gas deposits on the tube wall affects the measured value, it must be cleaned regularly; for thin tube meters, it is more prone to clogging and cannot be used under normal circumstances.
The use of pulsating flow will be limited.
Thermal mass flow meters for liquids are also restricted in the use of viscous liquids.
Differential Pressure Flow Meter is also called DP flow meter. Differential pressure flow meters use the principle of differential pressure to measure the flow of liquid, gas, and steam.
The differential pressure flow meter is measured by the working principle that there is a certain relationship between the pressure difference and the flow rate when the medium fluid flows through the throttling device. Differential pressure (DP) flow meters are the most widely used form of flow measurement products today. Including integrated orifice flowmeter, average velocity tube flowmeter, venturi tube, wedge flowmeter, underwater flowmeter, orifice plate, orifice carrier assembly, nozzle flowmeter.
Advantages
The most widely used, such as orifice flowmeter, has a firm structure and stable and reliable performance;
It has a wide range of applications and is still the most used type of flowmeter;
The detection parts, transmitters and display instruments can be produced by different manufacturers, which is convenient for large-scale production.
The measurement accuracy is unstable. Affected by installation and fluid impact (such as orifice plate, nozzle flowmeter) is prone to wear. In turn affect the accuracy of measurement data;
The range is narrow, generally 3:1~4:1;
On-site installation conditions require high requirements, and inaccurate installation will have a greater impact on measurement accuracy;
The installation pipeline conditions have no influence on the measurement accuracy;
Can be used for high-viscosity liquids;
Wide range;
The direct-reading meter can directly obtain the cumulative and total amount without external energy.
Clear and clear, easy to operate.
Advantages
The measurement accuracy is high, and the basic error is generally ±0.5%R. Special ones can reach ±0.2% R or higher. It is especially suitable for use in the field where high-precision measurement is required.
There is no influence on the measurement accuracy when measuring the distortion of the flow velocity field of the rotating flow and the pipe choke. There is no requirement for the front straight pipe section.
Can be used for the measurement of high-viscosity fluids. Wide flow range. Generally, it is 10:1 to 5:1, and can reach 30:1 or more in special cases.
With on-site flow direct reading. No external power supply is required. The cumulative total can be measured, the display is clear, and the operation is convenient.
The design of the measurement structure is complicated. The flowmeter is large and heavy, especially the flowmeter with larger caliber. Huge volume, only suitable for small and medium calibers.
Compared with other general flow meters (such as orifice flow meters, float flow meters, electromagnetic flow meters, vortex flow meters). The measured medium type, medium working condition (temperature, pressure), and caliber are relatively limited, and the scope of application is narrow.
Only suitable for clean single-phase fluids. When the fluid contains particles and dirt, a filter must be installed upstream. Not only increases the pressure loss, but also increases the maintenance work. If measuring liquids containing gas, a gas separator must be installed.
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.
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.
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.
To measure crude oil, you can also consider the oval gear flowmeter first. If the precision is extremely high. Then you can use a mass flow meter.
The first mass flowmeter is required to measure the flow of crude oil in the supply pipe to the primary oil refining. The mass flow rate here is 1600 t/h.
The second meter is used to measure black oil in the pipeline to the Commodity and Raw Materials Park.
Additionally, the customer required simple installation, high accuracy, and smooth integration of the new meters into existing systems.
The measurement of flare gas flow has always been the requirement of refinery, petrochemical, chemical and other various factories. Better measurement of flare gas flow. It can not only alleviate the pressure of enterprise safety management, but also reduce material loss, which is of great significance. However, there are many difficulties in flare gas measurement. Take a look at the following different measurement methods, there is always one that suits you.
Flare gas flow measurement method
There are three main methods to measure the flow of flare gas. These methods include the following types of flow meters:
Ultrasonic flowmeter
Thermal flow meter
Differential pressure flowmeter
In global gas flow measurement applications. The growth rate of flare gas flow measurement is ranked second. With the increasingly stringent environmental requirements, the demand for flare gas measurement will continue to increase. In this field, ultrasonic flow meters, thermal flow meters, and differential pressure flow meters have their own advantages.
In the oil and gas industry, there are many items that need to be metered. Generally, monitoring instruments are used. Such as pressure gauges, flow meters, thermometers, etc. These are called meters in the oil and gas industry.
The main purpose of the Oil flow meter is to measure the volume or mass flow of oil media. Such as commonly used turbine flow meters, gear flow meters, mass flow meters, and so on.
The flow meter is a device installed in a pump manifold or treating line to measure the fluid flow rate. Flowmeters can be used to measure the flow rates of liquid or gas and are available in various configurations and with different operating principles.
Featured Inline Propane Flow Meter Propane is also generally referred to as liquefied petroleum gas (LPG). So what…
Oil and Gas Flow Meter Selection Conclusions
As long as there is commercial oil and gas extraction, the industry faces the challenge of accurate measurement. From allocating production to the stakeholders of each well to monitoring the oil and gas delivered. Everyone in the oil and gas industry has a vested interest in ensuring that flow rates are measured correctly.
Over the years, this has spawned a variety of metering technologies. The growth of the oil and gas market has in turn generated demand for different flowmeter types.
Before you choose the right Oil and Gas Flow Meters, you need to consider many factors. If you need technical support, please contact our engineers.
Sino-Inst’s Oil and Gas Flow Meter offer reliable and accurate volume flow measurement in a large range of sizes and pressure rating while being fully compliant with international standards.
Sino-Inst is the risk-free choice for your gas flow measurement applications.
Sino-Inst’s Oil and Gas 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.
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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.
Velocity Flow Meter is a flow meter that obtains flow parameters by directly measuring the flow rate of the full pipe in the closed pipe section. The flow rate can be calculated by measuring the velocity of the flow by using a velocity flow meter. Velocity flow meters mainly include-electromagnetic, ultrasonic, turbine, vortex, precessing vortex, rotor, etc.
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Flow Meter Types
There are many types of flow meters. Basically, there are the following types of flow meters
Volumetric type: waist wheel, oval gear, piston, etc.
Differential pressure type: orifice, bar type such as annubar, V cone, wedge type, elbow, nozzle, target type, etc.
Variable area: rotors, open channels, etc.
Quality: Coriolis, thermal type, etc.
Why are there so many types of flow meters? This starts with the working conditions of the factory. The three elements of working conditions, medium, temperature, pressure, and conditions are ever-changing. Create thousands of types of working conditions. It requires different principles and different types of flow meters.
A magnetic Flow Meter is a flow meter that measures the flow of conductive fluids. Abbreviated as EMF, also called Electromagnetic flowmeters. It is a kind of Volumetric flow meter. A magnetic flow meter measures the velocity of conductive liquids moving through a pipe or conduit. In the wastewater treatment industry, a Magnetic Flow Meter is the best flow meter choice.
Can not be used to measure gas, steam and liquids containing a lot of gas;
Cannot be used to measure liquid media with very low conductivity.
Cannot be used to measure high temperature media. At present, it is restricted by the lining material and electrical insulation material of the measuring tube of the electromagnetic flowmeter for general industry;
The electromagnetic flowmeter is easily affected by external electromagnetic interference.
The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.
Transit time ultrasonic flow meter is most suitable for measuring the flow of cleaning liquid. Therefore, it is the most popular type of ultrasonic meter.
Doppler ultrasonic flow meter can measure the frequency difference of sound waves reflected from bubbles or particles in the airflow. It is suitable for aerated or dirty liquids.
Ultrasonic flowmeter is a non-contact measuring instrument, which can be used to measure the flow of fluids and large pipe diameters that are not easy to contact and observe. It does not change the fluid flow state, does not produce pressure loss, and is easy to install.
It can measure the flow of strong corrosive media and non-conductive media.
Ultrasonic flow meters have a large measuring range, with pipe diameters ranging from 20mm to 6m.
Ultrasonic flowmeter can measure the flow of various liquids and sewage.
The volume flow measured by the ultrasonic flowmeter is not affected by the temperature, pressure, viscosity and density of the fluid being measured. It can be made into fixed and portable forms.
Disadvantages of Ultrasonic Flow Meters
The temperature measurement range of an ultrasonic flowmeter is not high, and generally it can only measure fluids with a temperature lower than 200°C.
Poor anti-interference ability. It is susceptible to the interference of bubbles, fouling, pumps and other sound sources mixed with ultrasonic noise, which affects the measurement accuracy.
The straight pipe section has strict requirements, 20D in the front and 5D in the back. Otherwise, the dispersion is poor and the measurement accuracy is low.
Uncertainty in installation will bring large errors to flow measurement.
The fouling of the measuring pipe will seriously affect the accuracy of the measurement and bring about significant measurement errors. Even in severe cases, the meter has no flow display.
Reliability and accuracy are not high (generally around 1.0-2.5), and repeatability is poor.
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.
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.
A vortex flow meter is also called Vortex shedding flow meter. Vortex Flow Meter is suitable for flow measurement of steam and various liquids and gases.
The vortex flowmeter is a volume flow meter that measures the volume flow of gas, steam, or liquid, the volume flow of standard conditions, or the mass flow of gas, steam, or liquid-based on the Karman vortex principle. When the fluid flows through the dust collector rod of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is proportional to the fluid velocity. Temperature and pressure compensation can be configured.
Output a pulse signal proportional to the flow rate, without zero drift.
The structure is simple, firm, easy to install and maintain. There is no need for pressure guiding pipe and three-valve group, etc., reducing leakage, blockage and freezing. The measuring element has simple structure, reliable performance and long service life.
The accuracy is high, generally ±(1~1.5)%R.
The measuring range is wide, the vortex flowmeter with a reasonable caliber is determined, and the range can reach 20:1.
Within a certain Reynolds number range, the output frequency of the orifice flowmeter is not affected by the physical properties (density, viscosity) and composition of the fluid, that is, the meter coefficient is only related to the shape and size of the vortex generator and the pipeline.
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.
(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 the mass flow. For gas, the final measurement result Should be the standard volume flow. Both the mass flow rate or the standard volume flow rate must be converted by fluid density, and changes in fluid density caused by changes in fluid working conditions must be considered.
(2) The main factors that cause flow measurement errors are: measurement errors caused by uneven flow velocity of the pipeline; the density of the medium when the fluid working condition changes cannot be accurately determined; 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 will cause measurement errors of the vortex flowmeter, or even fail to work normally. The high-velocity impact of the channel fluid will cause additional vibration to the cantilever of the vortex generator, which will reduce 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.
Variable area flow meters are flow meters in which the fluid must pass through a restricted area. Because the flow cross-sectional area of the flow meter varies with the height of the float. Therefore, this type of flowmeter is called variable area flowmeter or equal pressure drop flowmeter. The typical instrument of this type of flowmeter is a rotameter. This is in contrast to flow meters such as orifice plates and venturi tubes, where the area of the flow element remains fixed. Variable area flowmeters can measure of gas and fluid flow.
Variable area flow meter advantages and disadvantages
The advantages of the variable area flow meter are simple structure and easy testing, suitable for measuring small flow.
The disadvantage of variable area flow meter is that it is easily affected by factors such as fluid density, pressure, and viscosity. When testing the flue gas flow, because the flue gas contains dust, the area flowmeter cannot be used.
Mechanical flow meters are a type of flow meters that use arrangement moving parts to measure flow. The fluid passes through a series of gears or chambers (positive displacement or PD) or through a rotating turbine or rotor. Mechanical flowmeter is different from electromagnetic and ultrasonic in principle. Mechanical flow meters easily monitor liquid flow rates for water, fuels, viscous fluids and more.
The normal pipeline flowmeter can directly measure the flow rate of the fluid. If it is a river, open channel, etc. Then you need to use a special flow meter to measure.
A flow meter (or flow sensor) is an instrument used to measure the linear, nonlinear, mass, or volumetric flow rate of a liquid or a gas. When choosing flow meters, one should consider such intangible factors as familiarity of plant personnel, their experience with calibration and maintenance, spare parts availability, and mean time between failure history, etc., at the particular plant site.
It is also recommended that the cost of the installation be computed, only after taking these steps different sensors include dial, in-line, ultrasonic, orifice plate, totalizing meters, variable area, venturi, or with switch output. The different designs of the flow meters have a variety of applications.
A wide variety of Velocity Flow Meters options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Velocity Flow Meters, located in China.
The top supplying country is China (Mainland), which supply 100% of the Velocity Flow Meters respectively.
Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Velocity Flow Meters products are most popular in Domestic Market, Southeast Asia, and Mid East.
You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.
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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.
Strap on Ultrasonic Flow Meter is also often called Clamp On Type Flow Meter. The unique feature of Strap on Ultrasonic Flow Meter is that the sensor does not need to be in contact with the medium, which is different from other flow meters.
Clamp on type, No need to cut the pipe or do any other changes.
No professional product knowledge required, installation and measurement can be done based on the guide.
No moving parts or pressure changes involved, installation can be done without stop provide.
The strap-on ultrasonic flow meters supplied by Sino-Inst are based on the working principle of the time difference method.
Transit Time Ultrasonic Flow Meter adopts the measurement principle of the time difference method. It uses the ultrasonic wave emitted by the sensor to propagate in the flowing fluid. The sound wave propagation speed in the downstream direction will increase, and the backward direction will decrease. In the same propagation distance, there will be different transmission times. According to the difference between the transmission time and the measured The relationship between fluid velocity measures the fluid velocity.
The flow rate of the fluid is different in different positions in the tube. The flow rate in the center of the tube is faster than the flow rate near the wall of the tube. The flow velocity distribution of the fluid in the pipeline can be represented by the flow velocity cross-sectional distribution diagram.
By setting the flowmeter and considering the cross-sectional distribution of the flow velocity, the average flow velocity can be calculated. Then the volume flow of the fluid can be obtained according to the cross-sectional area of the pipe.
Notes: V measure fluid velocity M ultrasonic reflection times D pipe diameter θ The angle between the ultrasonic signal and the fluid T up The time when the downstream sensor transmits the signal to the upstream T down Time from upstream sensor to downstream ΔT = T up – T down
Sino-Inst concentrates on the development of flow measurement technology. The products serve real-time flow measurement and participation process control in the production process. The main customer industries are the chemical production process, fine chemical production, cleaning industry, beverage industry, etc.
With the world’s most advanced time measurement chip (time resolution of 50ps), Sino-Inst has developed a series of straps on ultrasonic flow meters.
It takes only 2-3 minutes to complete the whole process from installation to measurement. It also adopts the current popular OLED display, which makes it easy to read in low light conditions.
Strap on Ultrasonic Flow Meters is widely used in the production process flow measurement and monitoring. The application of the product continuously and effectively controls the flow of the fluid, so as to improve the yield of the product and even save the input of the personnel, bringing benefits to the production enterprise.
Strap on Ultrasonic Flow Meters also satisfies different clean fluid measurements: various acids, alcohols, chemical solvents, alcohol, beverage water, Coca-Cola water, etc. Strap on Ultrasonic Flow Meters output signal, such as 4-20mA. The flow signal can be connected to a paperless recorder. Carry out multi-channel flow signal monitoring. What Is A Paperless Recorder?
Ultrasonic Clamp-on Flow Meter is composed of an integrated host and external clamp-on sensors. Clamp-on Flow Sensors are available at room temperature and high temperature.
High Accuracy measuring:
Linearity: better than 0.5%, Repeatability: better than 0.2%, Accuracy: better than ±1%
(1) Time difference method ultrasonic flowmeter; (2) Frequency difference method ultrasonic flowmeter; (3) Phase difference method ultrasonic flowmeter; (4) Doppler ultrasonic flowmeter; (5) Ultrasonic flowmeters for partially full pipes and river channels that combine liquid level measurement and average flow velocity measurement.
Doppler ultrasonic flowmeter is widely used in industry, water conservancy, irrigation, and other industries. It is suitable for flow measurement of full pipe, partial pipe, open channel, etc.
Water distribution in the irrigation area requires real-time monitoring of the branch canal water level and flow. The traditional method is to measure the water level method. This method has high civil construction costs. The monitoring efficiency is low. The measurement accuracy is not enough.
Doppler ultrasonic flowmeter solves the problem of water measurement in-branch canals in irrigation areas.
Just fix the probe at the bottom of the channel. The device automatically measures the channel water level, flow area, and flow rate in real-time and calculates the instantaneous flow and cumulative flow. The flow rate measurement accuracy can reach ±1%+±1cm/s.
(2) Main channel flow monitoring (wide channel)
The difference between the main canal and the branch canal is that the width of the main canal is wider. Therefore, it is necessary to install multiple sets of Doppler ultrasonic flowmeters to accurately measure the flow velocity at different positions of the section during the operation.
The flow of the entire channel can be accurately measured through the integration method. This method is also applicable to some wide rivers.
(3) Monitoring of urban drainage pipeline flow
With the implementation of smart municipal administration, in order to monitor the operation of urban drainage pipe networks, municipal departments need to monitor the water level and flow of drainage pipes in real-time.
Through the analysis of the water level and flow data, the problems of siltation, overload, overflow, and abnormal water infiltration in the pipeline can be distinguished.
Sino-Inst, Manufacturer for Strap on Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN 5—6000mm. It can measure even liquids such as water, seawater, oil, and slurry.
Sino-Inst’s Strap on Ultrasonic Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
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.
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 minimum current is 4mA and the maximum current is 20mA. Our commonly used electromagnetic flowmeters, turbine flowmeters, mass flowmeters, gas flowmeters, etc. all have the function of 4-20mA signal output.
The signal current of general instruments is 4-20mA, which means that the minimum current is 4mA and the maximum current is 20mA.
The industry generally needs to measure various non-electrical physical quantities. For example, temperature, pressure, speed, angle, etc. They all need to be converted into analog electrical signals before they can be transmitted to the control room or display equipment hundreds of meters away. This device that converts physical quantities into electrical signals is called a transmitter. The most widely used in the industry is to use 4-20mA current to transmit analog quantities.
In the industrial field, to complete signal conditioning and long-term transmission, the following problems will occur:
Since the transmitted signal is a voltage signal, the transmission cable will be interfered by noise;
The distributed resistance of the transmission cable will produce a voltage drop;
How to provide the working voltage of the instrumentation amplifier in the field is also a problem.
In order to solve the above problems and avoid the influence of related noise, we will use current to transmit signals. Because the current is not sensitive to noise.
The 4-20mA current loop uses 4mA to represent the zero signal. Use 20mA to represent the full scale of the signal. The signals lower than 4mA and higher than 20mA are used for various fault alarms.
Why Choose 4-20mA Instead of 0-20mA for the Flowmeter?
Many people will certainly ask: Why choose 4-20mA instead of 0-20mA? Very simple, if 0 is the smallest, then the open circuit fault will not be detected!
So, why is it 4mA? During normal operation, the current signal will not be lower than 4mA. When the transmission cable is broken due to a fault, the loop current drops to zero. 2mA is often used as the disconnection alarm value. There are two reasons. One reason is to avoid interference. Another reason is that a two-wire system is used at 4-20mA. That is, the two wires are the signal wires. It is also a power cord. And 4mA is to provide the static working current of the circuit to the sensor.
The transmitter controls the 4-20mA signal to change in proportion to the process variable
The indicator converts the 4-20mA signal into the corresponding process variable
Indicator or controller I/O input resistance 250Ω shunt generates 1-5V input signal (Ohm’s law: voltage = current * resistance, 4-20 mA X 250 ohms = 1-5V)
Usually:
They convert the temperature signal of the thermocouple or thermal resistance sensor into a 4-20mA signal and then output;
The controller then translates 4-20mA into a specific temperature value;
Based on this temperature value. The control loop realizes the control of the process terminal control element.
Similarly, the pressure transmitter is in the control loop. Usually used to measure the pressure value of the process medium:
1) The sensor senses pressure. The transmitter converts the signal into 4-20mA signal; 2) The controller then reversely translates the 4-20mA signal into a pressure value; 3) The controller is based on the pressure value. Send instructions to the valve. Control valve opening to realize safety valve control. Ensure that the container does not generate dangerous pressure.
A Digital Water flow meter is a flow meter that can display the water flow rate, and have the output for the flow rate. Like 4-20mA output, HART, RS 485, and so on. Digital Water Flow Meter is also called Electronic Water Flow Meter. Digital Water Flow Meter is widely used in industrial water and household water measurement. Most of the Sino-Inst flow meters are digital water flow meters. Like the electromagnetic flowmeter, Portable ultrasonic flow meter, Turbine flow meter…..
No matter which WaterFlow Meters you choose. The signal output by WaterFlow Meters, such as 4-20mA. The flow signal can be connected to a paperless recorder. Carry out multi-channel flow signal monitoring.
The analog flow meter is a flowmeter with the analog output signal. Analog output is a common function of flow meters. The analog signal is mainly used to output the flow signal to the next control system.
The analog signal refers to the continuous signal of the information parameter in a given range. The characteristic quantity of the information of the analog signal can be transformed into an arbitrary numerical signal in an instant. In the process of transmitting analog signals, the information signals need to be converted into electric wave signals, which are then transmitted through wired or wireless methods.
Analog signal: poor confidentiality, weak anti-interference ability.
Digital signal: strong anti-interference ability and good communication confidentiality.
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.
There are many types of flow meters on the market. There are vortex flowmeters, target flowmeters, electromagnetic flowmeters, thermal gas mass flowmeters, etc. Different industries have different choices of flow meters.
Sewage treatment
Sewage is divided into industrial sewage and domestic sewage Sewage is a solid-liquid mixed fluid. Industrial wastewater is corrosive due to its complex composition. The measurement is difficult. Most meters cannot make measurements. The main application instruments for sewage treatment are electromagnetic flow and a small number of open channel flowmeters. There are a variety of linings and electrode materials for electromagnetic flowmeters to choose from. High precision and corrosion resistance, it is the main force for measuring the flow of industrial sewage and domestic sewage.
When measuring air, steam and other gases. The use of vortex flowmeters is the most common. There are also V cones, orifice plates, etc.;
When measuring viscous oily media. Volumetric meters have good application and measurement effects;
Orifice plate and V cone are the most used for ammonia and liquefied gas measurement;
Measure all kinds of light oil. Such as diesel, gasoline, non-corrosive chemical solvents, etc. Turbine flowmeter is the first choice;
Metal rotor flowmeters are also widely used in the chemical industry. Mainly used in the measurement of small flow and process control;
In the measurement of chemical wastewater, electromagnetic flowmeter is currently the only choice.
Food and pharmaceutical industry
Requirements for flow meters in the food and medicine industry:
High measurement accuracy requirements;
The watch body is made of stainless steel, anti-corrosion and anti-rust;
The quick-loading structure is convenient for cleaning and maintenance.
Sanitary electromagnetic flowmeter Mainly measure clean water, fruit juice, emulsion, liquid medicine, etc. Usually the clamp type connection is convenient for disassembly and cleaning; the material is stainless steel, and the lining is high temperature resistant FEP, PFA, etc. Because there is no dead angle in the structure, it is convenient for high temperature disinfection, and it is the most widely used.
Vortex flowmeter Mainly measure steam, water, beer, edible oil, etc. The material is stainless steel, and the flange clamp is used, which is convenient to use. The disadvantage is that the accuracy is slightly worse than that of electromagnetic flowmeters.
Turbine flowmeter At present, some manufacturers have introduced sanitary turbine flowmeters, most of which are flange-mounted, but also have a clamp-type structure. The measurement accuracy is equivalent to that of electromagnetics. Because of oil prohibition, sealed bearings must be used, and they must be replaced regularly.
A flow meter (or flow sensor) is an instrument used to measure the linear, nonlinear, mass or volumetric flow rate of a liquid or a gas. When choosing flow meters, one should consider such intangible factors as familiarity of plant personnel, their experience with calibration and maintenance, spare parts availability, and mean time between failure history, etc., at the particular plant site.
It is also recommended that the cost of the installation be computed, only after taking these steps different sensors include dial, in-line, ultrasonic, orifice plate, totalizing meters, variable area, venturi, or with switch output. The different designs of the flow meters have a variety of applications.
CO2 flow meters are instruments that can measure the flow of gaseous or liquid carbon dioxide. CO2 is…
Looking for 4-20ma flow meters? The flow meter is a fast, accurate, and reliable permanent linear motion. In Sino-Inst, you can also find other good deals on measurement and analysis instruments and tools! Keep an eye out for promotions and deals, so you get a big saving of 4 20ma flow meters. You can shop for 4 20ma flow meters at low prices.
There is a wide variety of 4-20ma flow meter items you can buy, such as turbine water flow meters, ultrasonic flowmeters. Common materials used for 4 20ma flow meters are stainless steel and carbon steel.
Sino-Inst offers over 50 4-20ma flow meters for flow measurement. About 50% of these are differential pressure flow meters, 40% are the liquid flow sensor, and 20% are Ultrasonic Level Transmitter and mass flow meters.
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.
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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.
Ultrasonic flow detectors are an important part of ultrasonic flow meters. Ultrasonic flow detectors are also called ultrasonic transducers. Ultrasonic flow detectors measure the volumetric flow of liquid within closed conduits. Ultrasonic flow meters use transit-time differences for measuring flow rates inside pipes from the outside using electronics and digital signal processing technology.
Built-in magnet, which can be directly attached to the pipe;
Can be used in strong electromagnetic interference occasions;
After the junction box is filled with glue, the protection level is IP68;
Complete specifications, divided into three models: large, medium, and small;
Measuring pipe diameter range DN15-DN6000;
The temperature range is -30~90°℃; -30~160℃
The measurement liquid is relatively wide, including water, seawater, slurry or oil, acid and alkali, and other homogeneous liquids;
Non-contact measurement method, lightweight and small size;
The installation of the clamp-on ultrasonic flowmeter probe is simple. And different sizes of probes can detect pipes of different pipe diameters. Under the condition of ensuring accuracy, the clamp-on ultrasonic flowmeter can measure the smallest pipe of DN15. The largest can measure DN6000 pipeline;
The external clamp ultrasonic flowmeter does not need to destroy the pipeline in the process of measuring the flow rate. The probe can directly touch the straight pipe section. No pressure loss. The flow measurement can be performed on the already installed pipe;
Suitable for measuring pipes of different materials. Common ones are metal pipes: stainless steel, carbon steel, cast iron, etc., plastic pipes, etc. There are also pipes with better sound-permeable materials.
Optional Ultrasonic Flow Detectors
Types
Picture
Spec.
Model
Measurement Range
Temperature
Dimension
Clamp on
Small Size
TS-2
DN15~DN100
-30~90℃
45×25×32mm
Medium Size
TM-1
DN50~DN700
-30~90℃
64×39×44mm
Large Size
TL-1
DN300~DN6000
-30~90℃
97×54×53mm
High
Temperature
Clamp on
Small Size
TS-2-HT
DN15~DN100
-30~160℃
45×25×32mm
Medium Size
TM-1-HT
DN50~DN700
-30~160℃
64×39×44mm
Large Size
TL-1-HT
DN300~DN6000
-30~160℃
97×54×53mm
Mounting
Bracket
Clamp on
Small Size
HS
DN15~DN100
-30~90℃
318×59×85mm
Medium Size
HM
DN50~DN300
-30~90℃
568×59×85mm
Extended
EB-1
DN300~DN700
-30~90℃
188×59×49mm
High
Temperature
Mounting
Bracket
Clamp on
Small Size
HS-HT
DN15~DN100
-30~160℃
318×59×110mm
Medium Size
HM-HT
DN50~DN300
-30~160℃
568×59×110mm
Extended
EB-1-HT
DN300~DN700
-30~160℃
188×59×49mm
Moeld
X3-φ6.35
X3-φ9.53
X3-φ12.7
X3-φ15
X3-φ20
X3-φ25
Weight(KG)
0.91
0.91
0.9
0.9
0.84
0.84
Moeld
X3-φ32
X3-φ40
X3-φ50
X3-φ63
X3-φ75
X3-φ99
Weight(KG)
0.82
0.88
0.98
1.43
1.52
1.95
Ultrasonic Flow Detectors Working Principle
Ultrasonic Flow Detectors are also called ultrasonic transducers. In fact, it is a piezoelectric ceramic whose frequency is the same as its resonant frequency. It uses the piezoelectric effect of the material to convert electrical energy into mechanical vibration.
Under normal circumstances, ultrasonic waves are first generated by an ultrasonic generator. It is converted into mechanical vibration by the ultrasonic transducer. The ultrasonic wave can be generated by the ultrasonic wave deriving device and the ultrasonic wave receiving device.
Ultrasonic transducers mainly include shell, acoustic window (matching layer), piezoelectric ceramic disc transducer, backing, lead-out cable, receiver, and other parts.
Among them, the piezoelectric ceramic disc transducer plays the same role as a general transducer. It is mainly used to transmit and receive ultrasonic waves, and above the piezoelectric ceramic disc transducer is the receiver. It is mainly composed of lead cables, transducers, metal rings, and rubber washers. Used as an ultrasonic receiver. Receive the Doppler dial-back signal generated outside the frequency band of the piezoelectric ceramic disc transducer.
Ultrasonic transducers are piezoelectric ceramics that resonate at ultrasonic frequencies. The piezoelectric effect of the material converts electrical signals into mechanical vibrations. The ultrasonic transducer is an energy conversion device. Its function is to convert the input electric power into mechanical power (ultrasound) and then transmit it out. , It consumes a small part of its own power.
Types of ultrasonic transducers: can be divided into piezoelectric transducers, sandwich transducers, cylindrical transducers, inverted horn transducers, and so on.
Transit Time Ultrasonic Flow Meter adopts the measurement principle of the time difference method. It uses the ultrasonic wave emitted by the sensor to propagate in the flowing fluid. The sound wave propagation speed in the downstream direction will increase, and the backward direction will decrease. In the same propagation distance, there will be different transmission times. According to the difference between the transmission time and the measured The relationship between fluid velocity measures the fluid velocity.
By setting the flowmeter and considering the cross-sectional distribution of the flow velocity, the average flow velocity can be calculated. Then the volume flow of the fluid can be obtained according to the cross-sectional area of the pipe.
Notes: V measure fluid velocity M ultrasonic reflection times D pipe diameter θ The angle between the ultrasonic signal and the fluid T up The time when the downstream sensor transmits the signal to the upstream T down Time from upstream sensor to downstream ΔT = T up – T down
Doppler ultrasonic flowmeter uses the physical principle of Doppler frequency shift to measuring the water flow velocity. Therefore, the Doppler ultrasonic flowmeter is suitable for measuring fluids containing solid particles or air bubbles. Not suitable for measuring pure water.
The scope of use includes: Natural rivers, artificial rivers, farmland channels, urban sewers, corporate sewage outlets, sewage treatment plants, etc.
The products comply with the SL/T 186-1997 standard.
It is suitable for environments that require continuous and accurate measurement of flow rate and flow rate. It has obvious advantages such as convenient installation and maintenance, high reliability, and high precision.
Ultrasonic flow detectors are also called ultrasonic transducers. Or it is often understood by people as an ultrasonic flow sensor.
Ultrasonic flowmeter is an application of ultrasonic, which measures the flow of liquid by applying the speed difference method.
Can do non-contact measurement;
No flow obstruction measurement, no pressure loss;
It can measure non-conductive liquids, which is a supplement to the electromagnetic flowmeter for unobstructed measurement;
Except for the pipe section type with measurement, there is generally no need for actual flow calibration;
In principle, it is not limited by pipe diameter, and its cost is basically independent of pipe diameter.
What is Gas Rotameter? Rotameter is also called float flowmeter. It is often called glass tube…
Sino-Inst, Manufacturer for Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN 25—150mm. It can measure even liquids such as water, seawater, oil, and slurry.
Sino-Inst’s Ultrasonic Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
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.
The Venturi Tube is a tubular device commonly used to measure fluid flow rates. It is based on a physical principle, the Venturi effect. This effect states that as a fluid passes through a narrow section of a pipe, its velocity increases and its pressure decreases. The design of the Venturi Tube takes advantage of this principle, with a gradually narrowing entrance and a subsequently expanding exit. As fluid enters the narrowed portion of the venturi, it accelerates, causing the pressure to decrease. This change in pressure can be measured by pressure measuring points on the pipe wall and calculated to determine the flow rate of the fluid.
Venturi Tube is a common flow measurement tool in industry. It is widely used in the measurement of various fluids because of its simple structure, good stability and high accuracy.
The Venturi effect describes the increase in velocity and decrease in pressure as a fluid passes through a narrow section of a pipe. When fluid enters a narrow section of a pipe, the flow rate increases and the corresponding pressure decreases. This effect was discovered by Italian physicist Giovanni Battista Venturi, hence its name.
This effect can be explained by Bernoulli’s equation. This equation is a fundamental law of fluid dynamics. Show that in an incompressible fluid without viscosity, the energy of the fluid along the streamline is conserved.
P + 1/2 ρ v^2 + ρ gh = constant
P represents the pressure of the fluid ρ is the density of the fluid v is the velocity of the fluid g is the acceleration due to gravity h is the height of the fluid
In practical applications, the Venturi effect allows the venturi tube to be used to measure the velocity of a fluid in a pipe, since the velocity of the fluid is proportional to the pressure difference in the pipe.
The Venturi effect is not only used in measurement tools, but is also widely used in many fields such as aircraft wing design, chimney airflow design, and underwater piping systems. It is a very important principle in fluid mechanics and has a profound impact on many branches of engineering and physics.
Venturi tube working principle
The venturi tube is composed of the following parts:
Entrance section: a short cylindrical section with a diameter of D;
Contracting section: the shape is a tapered tube, the cone angle is about 21°±2°;
Throat: a short straight pipe section with a diameter of about 1/3~1/4D and a length equal to the pipe diameter;
Diffusion section: Conical tube with a cone angle of 8°~15°. There is a pressure measuring ring at 0.25-0.75D from the end of the inlet section, with at least 4 pressure measuring holes on it, and the pressure ring leads to the pressure gauge.
In addition, in the center of the throat, there is also a multi-channel pressure measuring ring leading to the pressure gauge. The pressure difference between the inlet section and the smallest section (that is, the throat section) can be measured through the scale of the pressure gauge or the automatic recorder.
Suppose the average velocity, average pressure, and cross-sectional area at the entrance section and the throat are v1, p1, S1, and v2, p2, S2; the fluid density is ρ.
Applying Bernoulli’s theorem and the continuity equation and noting that the streamlines of average motion are of the same height, we can get:
The formula for calculating the flow rate Q can be obtained:
After knowing ρ, S1, S2 and measuring p1-p2, the flow rate Q can be obtained according to the above formula.
The main advantage of the venturi tube is its simplicity of installation. Secondly, due to its diffusion section, the fluid gradually decelerates, reducing the turbulence (see turbulence). Therefore, the pressure head loss is small, no more than 10-20% of the pressure difference between the inlet and the throat.
Venturi tube design
According to the manufacturing process and use, the venturi is divided into standard venturi, general venturi, venturi flow tube, small diameter venturi, rectangular venturi, and other structures. The detailed structure is as follows:
Structure type:
The standard (classic) Venturi tube is composed of an inlet cylindrical section A, a conical contraction section B, a cylindrical throat C, and a conical diffusion section E. The diameter of the cylinder section A is D, and its length is equal to D; the contraction section B is conical and has an included angle of 21º±1º; the throat C is a circular cylinder section with a diameter d, and its length is equal to d; the divergent section E It has a conical shape with a spread angle of 7º~ 15º.
The general-purpose venturi, like the standard venturi, is composed of an inlet cylindrical section A, a conical contraction section B, a cylindrical throat C, and a conical diffusion section E.
The general-purpose venturi adopts the method of changing the contraction angle of the standard venturi and the length of the diffusion section to make it have the advantages of venturi, greatly shortening the length of the body, and effectively reducing the pressure loss.
The Venturi flow tube is also composed of an inlet cylindrical section A, a conical contraction section B, a cylindrical throat C, and a conical diffusion section E. The Venturi flow tube adopts a special pressure method to make it widely used in the flow measurement of dirty media and mixed-phase flow.
The small diameter venturi is composed of an inlet cylindrical section A, a conical contraction section B, a cylindrical throat C, and a conical diffusion section E. The small diameter venturi adopts an integrated mechanical processing method to measure the fluid flow of small diameters. At the same time, it can use a variety of materials to meet the requirements of the on-site working conditions and can meet various connection methods such as welding, flange connection, and threaded connection.
The rectangular venturi is composed of an inlet cylindrical section A, a conical contraction section B, a cylindrical throat C, and a conical diffusion section E. Main technical parameters of rectangular venturi:
Nominal diameter: DN=1.13×(WH)0.5≤6000mm
Inlet diameter ratio W/H: 0.5≤W/H≤2.0
Throat diameter ratio w/h: 0.5≤w/h≤2.0
Equivalent β value: 0.44≤β=(w/h)0.5/(W/H)0.5≤0.74
Reynolds number range: 2×105≤ReD≤2×107
Accuracy: ±1%
Repeatability: ±1%
Working pressure: 0~25Mpa
Working temperature: -100℃~500℃
Turndown ratio: 1:10
Rectangular venturi is mainly used in power plant air supply and suction, heating furnace air supply, and suction occasions.
Using the Venturi Effect to measure flow, the simple steps are as follows:
Install the venturi: First install the venturi in the pipe where the flow is to be measured.
Connect the differential pressure sensor:
Install a pressure sensor at the wide end and the narrow end of the venturi tube. These sensors measure the pressure difference between the two ends, which is directly related to the fluid velocity.
Reading the pressure difference:
As fluid passes through a venturi, its velocity increases in the narrow section, causing the pressure there to drop. The differential pressure sensor reads the pressure values at the wide end and narrow end and calculates the pressure difference between the two.
Calculate flow velocity:
Use Bernoulli’s equation and continuity equation to calculate the velocity of the fluid. v = sqrt(2(P1 – P2)/ρ). where P1 is the pressure at the wide end, P2 is the pressure at the narrow end, and ρ is the density of the fluid.
Determine the flow rate:
Calculate the flow rate (Q), the formula is: Q = A2 × v. where A2 is the cross-sectional area of the narrow portion of the venturi tube and v is the fluid velocity calculated in the previous step.
Recording and monitoring: Continuously monitor pressure difference and flow, and record data for analysis or monitoring system status.
Venturi tube flow meter
A Venturi flow meter is a differential pressure flowmeter. The Venturi flow meter is a combination of a Venturi tube, a differential pressure transmitter, and a valve block. It is often used to measure the flow of pressure pipes.
Venturi flow meters are often used to measure the flow of fluids such as air, natural gas, coal gas, and water. It includes three parts: “constriction”, “throat” and “diffusion”. Install on the pipe where the flow rate needs to be measured.
Venturi flowmeter is a new generation of differential pressure flow measuring instruments. The basic measurement principle is a flow measurement method based on the law of conservation of energy-Berlier equation and flows continuity equation.
The throttling process of fluid flowing through the inner venturi tube is basically similar to the throttling process of fluid flowing through a classic venturi tube and an annular orifice plate.
It is applied to the flow measurement of various media and has the characteristics of small permanent pressure loss, the required long and short front and rear straight pipe sections, and long service life.
Casing type venturi:
It is mainly used in the flow measurement and control of various large-caliber and high-pressure or dangerous media in the petrochemical industry.
Venturi nozzle:
It is suitable for the measurement occasions of various media. It has the characteristics of small permanent pressure loss, a short length of the front and rear straight pipes required, and long life. The installation length of the body is shorter than that of the classic venturi.
If it can be accurately manufactured in accordance with ASME standards, the measurement accuracy can also reach 0.5%. However, the accuracy of the domestic Venturi flowmeter is difficult to guarantee due to its manufacturing technical problems.
For the working condition of ultra-supercritical power generation, the use of the equalizing ring at the throat is a very dangerous link under high temperature and high pressure. If the equalizing ring is not used, the standard will not be met. The measurement accuracy cannot be guaranteed. This is a contradiction in the manufacture of high-pressure classic Venturi flowmeters.
The pipe is made of the same material as the inlet and outlet. Fluid scouring and abrasion of the throat are severe. Long-term measurement accuracy cannot be guaranteed. The length of the structure must be manufactured according to regulations. Otherwise, the required accuracy will not be achieved.
Due to the strict structural regulations of the classic venturi, its flow measurement range is the largest and the minimum flow ratio is very small, generally between 3 and 5.
This makes it difficult for Venturi flowmeters to meet flow measurements with large flow changes.
Since its development, venturi products have been successfully applied to the measurement of high-humidity natural gas, low-pressure dirty biogas, coke oven gas, gas, steam, hot water, high-temperature hot kerosene, etc., And the practical application range is rapidly expanding.
Besides, the venturi tube has a unique measurement advantage, for measuring conditions such as long straight pipe installation conditions, special high temperature, high pressure, strong corrosive and dirty media, and non-single phase flow measurement.
Of course, in the sewage and wastewater treatment industry, in addition to venturi flowmeters, electromagnetic flowmeters are also the first consideration for many users. For example, if you need to measure the flow of wastewater in a 2-inch pipe. Then you can refer to Magnetic Flow Meters Guides.
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A wide variety of Annubar flow meter 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.
The top supplying country is China (Mainland), which supply 100% of the turbine flow meter respectively. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.
You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.
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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.
You may have heard of flow transmitters and flow meters. Are flow transmitter and flow meter the same? What is the difference and relationship between them before? Should you buy a flow meter or a flow transmitter? What kind of one to buy?
Let us discuss both flow meter and flow transmitters individually to you understand their concepts thoroughly.
A flow meter is an instrument used to measure the flow of fluid in a pipeline or open channel. It measures the flow of fluids, liquids, or gases through a closed transmission system.
Flow meters are divided into differential pressure flow meters, rotor flow meters, throttling flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, and ultrasonic flow meters. Classified by medium: liquid flow meter and gas flow meter.
These different flow meters have different functional principles. For example, an orifice flowmeter calculates the fluid flow at the entrance cross-section of a narrow, restricted opening (called an orifice) and the exit cross-section of the orifice. On the other hand, a rotameter-type flow meter can measure the volume flow inside multiple tubes placed in different areas of the transfer tube.
The above is a general introduction to the flowmeter. simply put. We can think that the flow meter is composed of two parts: the sensor and the signal processor. This structure can be installed separately or as a whole. So, the signal processing part here is the Flow Transmitter we are going to talk about next.
The flow transmitter is an important part of the flowmeter. It is a flow meter with an integrated circuit as its operating system. In the flow transmitter, the flow measurement activity is executed by the electronic circuit after receiving the command from the operator. Since flow transmitters have electronic circuits, these devices can be used to control and monitor fluid flow.
A transmitter (transmitter) is a converter that converts the output signal of the sensor into a signal that can be recognized by the controller. It can also convert the non-electricity input from the sensor into an electrical signal and amplify the signal source for remote measurement and control.
There are many types of transmitters. The transmitters used in industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, and so on. Among various types of instruments, transmitters have the most extensive and common applications.
Therefore, the flow transmitter converts the flow signal collected from the flow sensor into an electrical signal. The various electrical signals that have been converted are used to facilitate the reception and transmission of other instruments or control devices. Through the electronic circuit again. Unify the electrical signals from the sensors. Converted to standard 4-20MA.
For example: The mass flow meter directly measures the mass value. The flow transmitter displays the volume value. This is the biggest difference! The output of the flow transmitter is 4~20MA, and the pressure can be directly displayed by connecting to the secondary meter.
Differences between the Flow Meter and Flow Transmitter
The following are some important differences between flow transmitters and flow meters.
The flow meter is designed to measure flow. On the other hand, flow transmitters can not only measure flow. They can also help control and monitor flow.
The flow meter is a standard mechanical system, such as an orifice plate, pressure gauge, etc. On the other hand, the flow transmitter has a mechanical body and an electronic function circuit.
The flow meter is designed for manual field applications. However, the flow transmitter can be operated remotely.
In fact, there is no strict classification of flow transmitters. The flow transmitter can be configured according to the customer’s functional requirements. For example, customers need a digital display, 4-20mA output, integrated. Or, the customer needs battery power. Digital display. No signal output.
The calibration methods and calibration requirements of flow transmitters with different functions are different. It is recommended that you check with the manufacturer before calibrating the flow transmitter. For example, the flow transmitter supplied by Sino-Inst has a key calibration function. Simple and easy to operate.
For another example, there are two calibration methods for common electromagnetic flowmeters. You may be reading: Magnetic flow meter calibration
Sino-Inst is a Flow Transmitter supplier, located in China. Flow Transmitter s products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Flow transmitters respectively.
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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.