What Is Turndown Ratio in Flow Meters? In simple terms, turndown ratio refers to the range of flow rates that a flow meter can accurately measure. This ratio is a crucial factor in selecting the right flow meter for your application, as it determines the meter’s ability to measure low and high flow rates with precision and accuracy.
Choosing a flow meter with a high turnover ratio can save you money and increase efficiency by eliminating the need for multiple flow meters or reducing maintenance and calibration costs. In this blog post, we will explore turnover ratio in flow meters, its importance, and how it impacts various industries.
Well, it’s the measurement range of a flow meter from the highest to the lowest flow rate it can accurately measure. Essentially, it tells you how much the flow rate can be turned down or decreased while still maintaining accurate readings.
For example, a flow meter with a turndown ratio of 10:1 can accurately measure flow rates from 100 L/H down to 10 L/H.
This ratio is an important consideration when selecting a flow meter for your application, as it determines the meter’s versatility and ability to handle varying flow rates.
A higher turndown ratio means more flexibility and potentially cost savings, as you may not need multiple flow meters for different flow rates.
Why is Turndown Ratio important?
In flow measurement, the turndown ratio indicates the range of flow over which the flowmeter can measure with acceptable accuracy. It is also known as adjustable range. This is very important when selecting a flow meter technology for a specific application.
If the airflow to be measured is expected to vary between 100,000 cubic meters per day and 1,000,000 cubic meters per day. The turndown ratio for a specific application is then at least 10:1. Therefore, the meter requires at least a 10:1 turndown ratio.
Formula for calculating Turndown Ratio
The turndown ratio can be expressed as: TR = Q(max)/Q(min)
TR = Regulation Ratio Q(max) = maximum flow Q (min) = minimum flow
Example calculation
If the gas to be measured varies between 100000 m3/day and 1000000 m3/day. This particular application has TR = 10:1. The TR of the required flow meter should be at least 10:1 If the flow meter has a maximum flow rate of 2000000 m3/day, then the required turndown ratio (TR) will be 20:1
Typical turndown ratios for various flowmeters
The examples here are for gas flow, but the same gauge type can be used for liquids, with similar turndown ratios.
Different types of flow meters have varying turnover ratios. Here are some common flow meters and their typical turnover ratios:
The actual adjustment ratio of the orifice meter is 3:1.
It’s important to note that these are general ranges and actual turnover ratios may vary depending on the specific model, size, and operating conditions. When selecting a flow meter, it’s crucial to consider the turnover ratio and ensure that it can accurately measure the flow rate needed for your application.
Choosing the right flow meter for your application
Selecting the right flow meter for your application is crucial to ensure accurate and precise measurements. Here are some key considerations when choosing a flow meter:
Flow rate range: Consider the expected flow rate range and select a flow meter with an appropriate turndown ratio.
Fluid properties: The properties of the fluid being measured, such as viscosity and corrosiveness, can affect the selection of a flow meter.
Environmental conditions: The operating environment, such as temperature and pressure, can impact flow meter performance.
Accuracy requirements: Consider the level of accuracy required for your application and select a flow meter that meets those requirements.
To maximize the turndown ratio of your flow meter, follow these best practices:
Proper installation: Ensure that the flow meter is installed correctly according to manufacturer specifications.
Maintenance: Proper maintenance of the flow meter, such as cleaning and inspection, can prolong its lifespan and improve performance.
Avoiding extremes: Avoid operating the flow meter at the extreme ends of its turndown ratio range, as accuracy may be compromised.
By considering these factors and following these best practices, you can select and maintain a flow meter that will provide accurate and reliable measurements for your application.
Turbine flow meter is a device used to measure the flow rate of fluids by using a turbine to detect changes in flow velocity. Well, in pharmaceutical manufacturing, precise flow…
Digital Gas Mass Flow Meters are a type of flowmeter that can measure gas flow at mass flow rate. Traditional gas flow meters are mainly measured by volume flow. Digital…
What is pressure drop in a pipe? Pressure drop is the decrease in pressure that occurs as fluids flow through pipes due to friction and other factors. When we choose…
Vertical Flow Meters refers to a type of flow meter installed in vertical pipes. Can Flow Meters Be Installed Vertically? We all take this into consideration when installing flow meters…
Oilfield wastewater, the water that is extracted from oil wells along with crude oil. Usually contains oil, salt, mechanical impurities, dissolved oxygen and saprophytic bacteria. Pollution to the oil field…
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In conclusion, turndown ratio is an essential factor to consider when selecting a flow meter for your application. It determines the range of flow rates that a flow meter can accurately measure, and a high turndown ratio can increase efficiency and potentially save you money.
Remember to consider the flow rate range, fluid properties, environmental conditions, and accuracy requirements when selecting a flow meter.
By following best practices such as proper installation, regular calibration, maintenance, and avoiding extremes, you can maximize the turndown ratio of your flow meter and ensure accurate and reliable measurements.
By selecting and maintaining the right flow meter, you can improve your operations and increase productivity.
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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.
Turbine flow meter is a device used to measure the flow rate of fluids by using a turbine to detect changes in flow velocity. Well, in pharmaceutical manufacturing, precise flow measurements are crucial for ensuring product quality, consistency, and safety. That’s where turbine flow meters come in. In this blog post, we’ll be taking a closer look at how turbine flow meters are used to measure demineralized water flow in the pharmaceutical industry. And the benefits they provide. So, let’s dive in and explore this exciting application case together!
A turbine flow meter is a type of flow meter that works by measuring the velocity of a fluid or gas as it passes through a turbine rotor. Turbine flow meters are commonly used to measure the flow of liquids and gases in a wide range of applications. They offer a high level of accuracy, especially in high flow rate applications, and can be used for both clean and dirty fluids. Turbine flow meters are also relatively easy to install and maintain, making them a popular choice in many industries.
The working principle of the turbine flowmeter is that a turbine is placed in the center of the pipe, and the two ends are supported by bearings.
As the fluid passes through the flowmeter tubes, it strikes the turbine blades. Generates driving torque to the turbine. Make the turbine rotate by overcoming the conflicting moment and the fluid resistance moment.
In a certain flow range, for a certain fluid medium viscosity, the rotational angular velocity of the turbine is proportional to the fluid flow velocity.
Thus, the fluid flow rate can be obtained from the rotational angular velocity of the turbine. The fluid flow through the pipe can then be calculated.
Turbine flow meters are widely used in various industries for measuring the flow rate of liquids and gases. Here are some common applications of turbine flow meters:
Petroleum industry:Turbine flow meters are used to measure the flow of crude oil, refined products, and natural gas in pipelines and other process applications.
Chemical industry: Turbine flow meters are used to measure the flow of acids, alkalis, solvents, and other chemicals in various chemical processing applications.
Water and wastewater treatment: Turbine flow meters are used to measure the flow of water and wastewater in municipal water treatment plants, wastewater treatment plants, and other applications.
Food and beverage industry: Turbine flow meters are used to measure the flow of liquids such as milk, juices, beer, and other beverages in food and beverage processing plants.
Pharmaceutical industry: Turbine flow meters are used to measure the flow of liquids in pharmaceutical manufacturing processes, such as the production of drugs, vaccines, and other medical products.
Overall, turbine flow meters are widely used in applications that require accurate measurement of flow rate. Such as process control, quality control, and monitoring of production processes.
Demineralized Water Flow Measurement Case Study
Challenges in measuring demineralized water flow
Demineralized water: water that has been softened. That is to say, the water with part or all of the calcium and magnesium ions removed is the water that does not form scale after boiling. Boilers must use this water.
Demineralized water is super important in making medicine because it needs to be pure and clean. But measuring how much of this water is flowing can be tricky for a few reasons.
The water doesn’t conduct electricity very well, which makes it hard to measure with regular equipment that relies on conductivity.
It needs to be measured with really good equipment that won’t make it dirty.
Air bubbles can form in the water, which messes up the measurements and might even break the equipment.
Temperature changes can also mess up the measurements because the water gets thicker or thinner depending on how hot or cold it is.
The equipment that measures the water flow needs to be taken care of and maintained regularly, which can be a big job, especially in large factories.
So, even though measuring the flow of demineralized water is important, it can be a challenge because of these issues.
Demineralized Water Flow Measurement in a pharmaceutical factory.
Soft water flow measurement in a pharmaceutical factory. Not long ago, we received an inquiry from a customer about a flow meter for measuring softened water.
After communication, I learned that this is a large local pharmaceutical factory. Therefore, after detailed communication, we learned that the customer needs to install a flow meter for measuring the flow of purified water on the equipment in the newly added pharmaceutical workshop. It is convenient for online real-time monitoring of softened water flow. Conducive to the management of ingredients, saving labor and time costs.
Considering the relatively low conductivity of demineralized water, it is not suitable to use electromagnetic flowmeters. We recommended liquid turbine flowmeters with sensitive response and high precision to our customer.
What is the K-factor in a flow meter? K-factor is a coefficient calculated by calibrating and comparing with other measuring…
So, to sum it up, measuring water flow accurately is really important in the pharmaceutical industry, especially when it comes to demineralized water. But, using turbine flow meters can help us measure the water flow more accurately, even though there are challenges like low conductivity and air bubbles. These meters are also easy to maintain and won’t make the water dirty.
In the future, we can expect to see more use of turbine flow meters in the pharmaceutical industry because everyone wants better and more consistent products. With advances in technology and better understanding of the importance of accurate flow measurement, these meters will probably become even more popular.
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.
Digital Gas Mass Flow Meters are a type of flowmeter that can measure gas flow at mass flow rate. Traditional gas flow meters are mainly measured by volume flow. Digital Gas Mass Flow Meters have higher measurement accuracy. We only discuss thermal gas flow meters and Coriolis mass flow meters here.
Do not need to do temperature and pressure compensation in principle with accurate measurement and easy operation；
Wide range: 0.5Nm/s~100Nm/s for gas. The meter also can be used for gas leak detection；
Good vibration resistance and long service life. No moving parts and pressure sensor in transducer, no vibration influence on the measurement accuracy；
Easy installation and maintenance. If the conditions on site are permissible, the meter can achieve a hot-tapped installation and maintenance. (Special order of custom-made)；
Digital design, high accuracy and stability；
Configuring with RS485 or HART interface to realize factory automation and integration；
It can directly measure the mass flow rate of the fluid (this is of great significance for the measurement and control of production processes such as energy metering and chemical reactions);
High measurement accuracy (at 0.1% to 0.5%);
The measurable ratio is relatively large. Generally, is 10:1 or 20:1;
It has a wide range of applications. In addition to normal gas-liquid measurement, it can also measure industrial media that are difficult to measure with general fluid measuring instruments. Such as high viscosity fluid, various slurries, suspensions, etc.;
It can measure the density, temperature and other parameters of the measured medium online.
The installation requirements are not high, and No requirements for the upstream and downstream straight pipe sections;
Digital Gas Mass Flow Meters have been widely used in various industries.
Petrochemical Industry: In the petrochemical industry, digital gas mass flow meters are used to measure the flow rate of natural gas, hydrogen, and other gases used in the production of chemicals and fuels. According to a study published by the American Institute of Chemical Engineers, the use of digital gas mass flow meters can help improve the accuracy and reliability of gas measurement, leading to more efficient production processes and reduced energy costs.
Semiconductor Industry: In the semiconductor industry, digital gas mass flow meters are used to measure the flow rate of high-purity gases such as nitrogen, oxygen, and argon used in the manufacturing of electronic components. According to a report by ResearchAndMarkets, the global market for mass flow meters, including digital gas mass flow meters, is expected to grow at a CAGR of 4.4% between 2020 and 2025, driven in part by the increasing demand for high-precision gas flow measurement in the semiconductor industry.
Food and Beverage Industry: In the food and beverage industry, digital gas mass flow meters are used to measure the flow rate of gases such as carbon dioxide and nitrogen used in the production and packaging of food and drinks.
Of course, in other industries, Digital Gas Mass Flow Meters is also playing an important role.
Sino-Inst offers a variety of Digital gas flow meters for flow measurement. If you have any questions, please contact our sales engineers. Featured Digital gas flow meters for Sale Are…
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In conclusion, digital gas mass flow meters are a vital tool for accurate and efficient gas measurement in a wide range of industrial applications. Their ability to accurately measure gas flow rates, even in challenging and varying conditions, makes them an essential component in many industries, including petrochemical, semiconductor, and food and beverage.
As a manufacturer of digital gas mass flow meters, Sino-Inst has many years of experience in gas measurement services. Our products are designed and manufactured to the highest standards, ensuring accurate and reliable gas flow measurement in even the most challenging environments.
If you need to purchase digital gas mass flow meters or have technical questions about gas measurement, please feel free to contact our sales engineers. We are always available to assist you in selecting the right product for your specific needs and ensuring you get the best possible gas measurement solution.
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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.
What is pressure drop in a pipe? Pressure drop is the decrease in pressure that occurs as fluids flow through pipes due to friction and other factors. When we choose and use various flowmeters, we may all hear the parameter of pressure loss or pressure drop.
It’s important to know how to calculate pressure drop in pipes, as it can help you troubleshoot issues, optimize your system’s performance. In this blog, we’ll show you how to calculate pressure drop in pipes and provide tips to minimize it in your system. Let’s dive in!
In industrial settings, pipes are often used to transport liquids, gases, and other materials over long distances. When fluids flow through pipes, they experience pressure drop due to various factors, which can affect the efficiency of the system and even cause equipment failure.
In an industrial pipe system, several factors contribute to pressure drop, including the flow rate, pipe diameter, pipe length, fluid properties (like density and viscosity). And the presence of fittings and valves. These factors must be carefully considered when designing or troubleshooting an industrial pipe system to ensure that it operates safely, efficiently, and reliably.
In this section, we’ll explore each of these factors in more detail and discuss their impact on pressure drop in industrial pipes.
Flow rate is one of the key factors that affects pressure drop in a pipe.
In simple terms, flow rate refers to the volume or mass of fluid that flows through a pipe per unit time. Typically measured in gallons per minute (GPM) or liters per second (L/s). The higher the flow rate, the greater the pressure drop in the pipe due to friction and other factors.
As the fluid flows through the pipe, it interacts with the walls of the pipe and experiences frictional resistance, which results in a loss of energy and pressure drop.
In addition to frictional resistance, high flow rates can also cause turbulence in the fluid, which further increases pressure drop. Turbulence occurs when the fluid flow becomes irregular and chaotic, causing eddies and vortices that can further reduce the fluid’s energy and increase pressure drop.
The National Institute of Standards and Technology (NIST) provides a comprehensive guide to fluid flow in pipes that includes equations and data for calculating pressure drop.
According to the NIST guide, the pressure drop in a pipe is directly proportional to the flow rate raised to the power of 1.75. This means that as the flow rate increases, the pressure drop increases at a faster rate.
The NIST guide is available on the official website of the U.S. Department of Commerce.
The diameter of a pipe is a crucial factor that affects pressure loss in pipelines. Generally, smaller pipes have higher pressure losses than larger pipes.
This is due to the relatively greater surface area of smaller pipes, which results in higher frictional losses and turbulence in the fluid.
Additionally, smaller pipes are more prone to blockages or obstructions, which can further increase pressure loss.
To illustrate the impact of pipe diameter on pressure loss, researchers often use the Darcy-Weisbach equation, which relates pressure loss to pipe diameter, fluid density, fluid velocity, and other variables.
According to this equation, pressure loss is proportional to the length of the pipe, the fluid viscosity, and the square of the fluid velocity. But inversely proportional to the diameter of the pipe raised to the power of 5.
For example, if the diameter of a pipe is doubled, the pressure loss is reduced by a factor of 32. This demonstrates the importance of selecting the appropriate pipe diameter for a given system to minimize pressure loss and optimize system performance.
The length of a pipe is another crucial factor that affects pressure loss in pipelines.
Generally, longer pipes have higher pressure losses than shorter pipes. This is due to the relatively greater surface area and more frictional losses in longer pipes.
Additionally, longer pipes are more prone to blockages or obstructions, which can further increase pressure loss.
The Darcy-Weisbach equation, which relates pressure loss to pipe length, fluid density, fluid velocity, and other variables. According to this equation, pressure loss is proportional to the length of the pipe, the fluid viscosity, and the square of the fluid velocity, but inversely proportional to the diameter of the pipe raised to the power of 5.
For example, if the length of a pipe is doubled, the pressure loss is also doubled. This demonstrates the importance of minimizing the length of pipelines and selecting the appropriate pipe diameter for a given system to minimize pressure loss and optimize system performance.
The fluid properties, including density and viscosity, are important factors affecting pipeline pressure loss. As the fluid density and viscosity increase, the pressure loss in the pipe also increases.
This is due to the increased friction between the fluid and the pipe walls, resulting in a greater loss of energy as the fluid flows through the pipe.
According to a study published in the Journal of Energy, the effect of fluid density on pipeline pressure loss can be significant. Increasing the fluid density from 1 kg/m³ to 1000 kg/m³ resulted in a 30% increase in pressure drop.
Another study published in the Journal of Petroleum Science and Engineering showed that the effect of fluid viscosity on pipeline pressure loss is even more significant. Increasing the fluid viscosity from 1 cP to 100 cP resulted in a 270% increase in pressure drop.
In addition to pipe diameter, length, and fluid properties, the fittings and valves used in a pipeline also affect the pressure loss. Fittings and valves cause additional turbulence in the fluid flow, leading to increased friction and pressure loss.
According to a report published by the National Institute of Standards and Technology (NIST), the pressure loss in a pipeline due to fittings and valves can range from 10% to over 50% of the total pressure drop, depending on the type and number of fittings and valves used.
Calculating pressure drop in a pipeline involves several steps, including:
Determine the flow rate of the fluid in the pipeline.
Determine the properties of the fluid, such as density and viscosity.
Measure the pipe length, diameter, and roughness.
Determine the number and type of fittings and valves in the pipeline.
Select the appropriate pressure drop equation based on the specific pipeline conditions and design.
Calculate the Reynolds number to determine if the flow is laminar or turbulent.
Use the selected pressure drop equation to calculate the pressure drop.
Compare the calculated pressure drop with the maximum allowable pressure drop to ensure that the pipeline operates safely.
It’s important to note that pressure drop calculations may need to be repeated several times to ensure that the pipeline design meets the required pressure and flow rate specifications. It’s also important to ensure that accurate and up-to-date data is used in the calculation to ensure the safety and efficiency of the pipeline.
Pressure Drop Equations
Pressure drop equations are mathematical formulas that engineers and designers use to calculate the pressure loss in a pipeline. There are many different equations, but three of the most common are Bernoulli’s equation, the Darcy-Weisbach equation, and the Hazen-Williams equation.
Bernoulli’s equation
Darcy-Weisbach equation
Hazen-Williams equation
For a detailed introduction to the equation, please refer to the professional academic website. There are detailed discussions. We will not repeat them here.
Online pressure drop calculators and software have made it easier than ever to calculate the pressure drop in a pipeline. These tools provide users with an easy and efficient way to input pipeline data and receive accurate pressure drop calculations.
Online calculators typically require the user to input pipeline data such as flow rate, pipe diameter, length, fluid density and viscosity, and fittings and valve information. The software then uses algorithms and equations to provide an estimate of the pressure drop in the pipeline.
These tools are particularly useful for engineers, technicians, and operators who need to quickly and accurately calculate pressure drops for a wide range of pipeline applications.
Flow Meter Pressure Drop, also known as Pressure loss, is one of the key indicators of flow meters.
Flow Meter Pressure Drop is used to describe the pressure difference (P1-P2) before and after the flow meter input (P1) and output (P2). It is also the minimum pressure difference to ensure the normal operation of the flowmeter. It is one of the basic parameters of the flowmeter.
The pressure loss of the flowmeter generally increases with the increase of the flow rate. Also affected by the solution. For example, the pressure loss of flowmeters based on ultrasonic flowmeters and MEMS (micro-electromechanical systems) is much smaller than that of vortex flowmeters and differential pressure flowmeters.
So is there any flowmeter that does not cause pipeline pressure loss? Yes. Ultrasonic flowmeter, clamp-on sensor, does not need to cut the pipeline, and will not affect the pressure of the pipeline.
Understanding the Pressure Drop of the pipeline helps us to design the pipeline system reasonably.
The Pressure Drop of the flowmeter is also an important parameter to consider. The pressure loss of the flowmeter will cause energy consumption, which is an important parameter to characterize the performance of the flowmeter. It is also more and more people’s attention and become one of the important indicators of flow meter selection.
Sino-Inst is a manufacturer of flow meters. If users have technical questions about the Pressure Drop of the flowmeter, they can contact our sales engineers at any time.
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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.
Vertical Flow Meters refers to a type of flow meter installed in vertical pipes. Can Flow Meters Be Installed Vertically? We all take this into consideration when installing flow meters. In fact, most flow meters can be installed vertically. However, certain measurement conditions also need to be met. Next, let’s analyze together.
Electromagnetic flowmeter is the most widely used type of flowmeter. Can the electromagnetic flowmeter be installed vertically?
vertical installation of magnetic flow meter
Electromagnetic flowmeters can be installed horizontally or vertically. However, vertical installation needs to pay attention to the following aspects, whether it is installed at the water inlet or the water outlet.
Standard installed in the middle of the vertical position where the water flows upwards. This installation complies with gravity. If it is installed downstream, it will not be a full pipe, and the water flow from bottom to top is always full. This facilitates accurate measurement of the flow meter. The straight pipe section is required to be 10D in front and 5D in back to ensure the use and accuracy requirements of the electromagnetic flowmeter.
Installed at the inlet of the pipeline (that is, upstream), so that the pipeline is always full.
The electromagnetic flowmeter should be installed in the lower part of the horizontal pipeline, vertically upward. Avoid installing at high places and vertically downward positions in the pipeline.
Requirements for straight pipe section: inlet/outlet straight pipe section: inlet ≥ 10×DN; water outlet ≥ 5×DN
In order to facilitate the detection of the flowmeter, a bypass channel is set in the measuring pipeline.
Grounding point requirements: In order to make the instrument work reliably, improve the measurement accuracy, and not be disturbed by strong external electromagnetic fields, the sensor should be well grounded, and the grounding resistance should be less than 10 ohms.
Precautions when choosing the installation location of the electromagnetic flowmeter:
Try to avoid ferrous objects and equipment with strong electromagnetic fields (such as large transmitters and generators).
The flow meter should be installed at the rear of the pump, never on the suction side, and the valve should be installed on the downstream side of the flow meter.
It should be installed in a dry and ventilated place as much as possible to avoid sun and rain. Avoid ambient temperatures above 60°C and relative humidity above 95%.
Choose a place with convenient installation and maintenance and convenient activities.
Can ultrasonic flow meters be installed vertically?
Ultrasonic flowmeters can be installed vertically. However, there are conditions. If the pipeline is vertical, then the vertical installation of the ultrasonic flowmeter requires the liquid flow to be bottom-up. It is also best to ensure that the pipeline is full during the measurement period. Otherwise, the error is quite large. Do not install vertically if the liquid flow is from top to bottom.
Can the turbine flowmeter be installed vertically?
The turbine flowmeter has many good functions, and it can have different application characteristics in different environments. Today we will talk about can the turbine flowmeter be installed vertically?
First of all, what we need to know is that it is very important to choose a suitable installation location to ensure the good use of the turbine flowmeter. In general, vertical installation and horizontal installation are both possible.
However, vertical installation needs to ensure that the turbine flowmeter is installed just above the direction of the liquid and in the direction of the liquid.
Second, debugging is required after installation. In this way, various problems that may arise during use can be avoided. The service life of the flowmeter is extended. And there is no need to worry about machine failure.
Can the vortex flowmeter be installed vertically?
The fluid flows from top to bottom, and the vortex flowmeter can be installed vertically. Just make sure there are no air bubbles in the tubing.
But one thing to remember is to make it clear with the supplier in advance when purchasing, so as not to affect its use in time. Although the vortex flowmeter can be installed vertically, you must pay attention to the installation direction of the flowmeter during installation, and it cannot be reversed.
When the medium measured by the vortex flowmeter is different, its installation direction is also different. For example, when measuring liquid flow, the installation direction needs to be from bottom to top. When measuring gas flow, the installation direction needs to be installed from top to bottom.
Can the orifice flowmeter be installed vertically?
When the orifice flowmeter is installed vertically, attention should be paid to the flow direction of the gas. Gas flows from bottom to top, which is also an important consideration for vertical installation of orifice flowmeters. Of course, it is also possible to flow from top to bottom.
In theory, when measuring gas flow, the orifice flowmeter is installed horizontally. The installation position of the flow sensor should be selected at a high place in the pipeline. to make sure the tube is full. It is not recommended to install in the low part of the pipeline. Because liquid will accumulate at the bottom of the pipe, the measurement will be inaccurate.
Can the mass flow meter be installed vertically?
Mass flow meters can be installed on horizontal or vertical pipes. The mounting orientation depends on the application.
Mass flowmeters with some geometries (except for straight tubes) will accumulate some solid or gaseous matter in a certain installation orientation.
If it must be installed vertically and the fluid flows from top to bottom. Measures must be taken to ensure that gas cannot enter the sensor from the sensor inlet pipe.
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Sino-Inst offers over 50 flow meter for flow measurement. About 20% of these are magnetic flow meters, 20% of these are turbine flow meters, 20% of these are vortex flow meters. And 40% are Ultrasonic flow meter and mass flow meter.
A wide variety of flow meters options are available to you, such as free samples, paid samples.
Sino-Instrument is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.
If you need to purchase a flowmeter, or you have doubts about the installation location of the flowmeter. You can contact our engineers to provide technical support.
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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.
Oilfield wastewater, the water that is extracted from oil wells along with crude oil. Usually contains oil, salt, mechanical impurities, dissolved oxygen and saprophytic bacteria. Pollution to the oil field and the surrounding environment. After treatment, it can be reinjected back into the oil layer to be used as an oil displacement agent. Most of the time, electromagnetic flowmeters are used to measure oilfield wastewater.
With the growth of oil demand and the improvement of oil extraction technology, the amount of oil extraction wastewater treatment is increasing day by day. Effective control of oil production wastewater pollution and the utilization of wastewater resources have become key issues facing oilfield development.
The first thing to do in wastewater treatment is to accurately measure the oil production wastewater. Only by accurately measuring the amount of wastewater can scientific and reasonable wastewater treatment and wastewater scheduling be carried out. After the wastewater is treated up to the standard, most of it will be used as mining injection water and re-injected into the formation.
Turbine flowmeters used in some early Oilfield Wastewater. The error between the instrument measurement data and the measurement tank data reaches more than 20%, which causes a great waste of on-site resources.
Oil production wastewater carries a large amount of suspended solids. The inner blades of the turbine flowmeter are easy to be jammed and damaged, and need to be dismantled and maintained regularly;
Turbine flowmeters used in different pipelines and process links are not universal. On-site instrument maintenance is difficult;
The flow rate of the 2-inch pipe is less than 70 cubic meters per day. The micro-flow turbine flowmeter cannot measure accurately;
The lower end of the coupling device is easy to accumulate impurities, which makes the measurement accuracy low. The tiny traffic of some sites cannot even be measured;
Oil production wastewater has a high temperature and contains different salts and other impurities. It is easy to corrode the turbine flowmeter.
Oilfield wastewater classification
Before sewage treatment, it is particularly important to determine its composition. The sewage on the oil field is divided into general sewage and drilling sewage:
General waste water
The main components are water, secondary clay minerals, mercaptan (RSH), sulfide (RSR), disulfide (RSSR) and other components condensed together by various substances.
For the composition of general sewage, because it contains more impurity particles, and the water is more acidic or alkaline. Therefore, the selected electromagnetic flowmeter can be measured with rubber or PTFE lining, and used with stainless steel electrodes.
Drilling sewage
The main components are drilling fluid, flushing fluid, etc. Its main pollutants include drilling cuttings, petroleum, viscosity control agents (such as clay), weighting agents, clay stabilizers, corrosion agents, preservatives, fungicides, lubricants, formation affinity agents, defoamers, etc. Drilling sewage also contains heavy metals and so on.
Drilling sewage contains more chemical synthetic agents, complex components, strong acidity and alkalinity and corrosiveness. It also contains some heavy metal ions. In order to ensure good detection and stability of the flowmeter, it is usually necessary to choose a polyurethane or polyperfluorinated lining for measurement. At the same time, tantalum electrodes or Ha C electrodes are used.
Application of Electromagnetic Flowmeter in Oilfield Wastewater and Oilfield
Electromagnetic flowmeters play an important role in water irrigation, polymer injection and sewage metering in oil fields.
The use of electromagnetic flowmeters in the measurement of oilfield wastewater has the following advantages.
①The structure of the sensor is simple and reliable. The diameter is the same as that of the front and rear straight pipe sections. And there are no moving parts in the flow channel. There are no parts to block the flow of the measured liquid and save equipment. There will be no jamming or jamming;
② The measured medium flows through the measuring tube. There is almost no loss of pressure, which can significantly reduce the consumption of the driving force of the pump;
③ The output current and frequency of the electromagnetic flowmeter have a linear relationship with the measured flow. It is not affected by the measured medium (temperature, pressure, viscosity). Therefore, the electromagnetic flowmeter can be used to measure crude oil with sandy content or high water content only after being calibrated with water without modification;
④ Electromagnetic flowmeter has no mechanical inertia and quick response. Instantaneous pulsating flow can be measured. It is convenient for the monitoring of the production site.
Selection of Electromagnetic Flowmeter for Measuring Oilfield Wastewater
It is very important to choose the type of instrument including the magnetic flowmeter. Some failures of instruments in practical applications are caused by wrong selection or improper use. Therefore, after selecting an electromagnetic flowmeter, the following factors should be considered:
Aperture Selection
According to the process pipe diameter, pipe pressure and sewage flow provided by the sewage treatment plant. Choose an electromagnetic flowmeter with an appropriate diameter, and there is no need for pipe shrinkage and expansion at the installation site.
Selection of Liner and Electrode Materials
Electromagnetic flowmeters are mainly used to measure fluid flow with a conductivity greater than or equal to 5 pressure S/cm. Different lining and electrode materials should be selected according to the corrosiveness, wear, temperature and condensation characteristics of the tested material and its bearing capacity.
Select the protection level
According to national standards, the sensor has two levels of protection: IP65 water jet type and IP68 submersible type. According to the actual installation position of the user in the low well, the sensor adopts IP68 dustproof submersible type.
Select other functions
(1) For the selected basic type, the electromagnetic flowmeter has LCD display, 4-20ma current output and 0-1khz frequency output. The function of the Rs-485 communication port should be added according to the communication requirements of the flowmeter and the computer.
(2) For sensors installed underground, split type should be selected.
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The flow of Oilfield Wastewater varies greatly, contains impurities, and is less corrosive, regardless of general sewage or drilling sewage. It contains many ions and has high conductivity. Combined with the unique characteristics of not being disturbed by external factors such as temperature, pressure and viscosity. Electromagnetic flowmeter is undoubtedly the most suitable choice for oil field sewage flow measurement.
In addition, in the sewage treatment process, large-diameter flowmeters are mostly split. One part is installed underground and the other part is installed on the ground. The small caliber is mainly integrated. In the water supply and drainage and sewage treatment industries, electromagnetic flowmeters, especially large-caliber electromagnetic flowmeters, have great advantages.
If you encounter a situation where the electromagnetic flowmeter is not applicable for Oilfield Wastewater. I think the target flow meter is a good choice. It is accurate in measurement, and the measurement structure is not affected by the physical characteristics of the medium temperature, pressure, conductivity, and the amount of impurities that are easily contained. The operation is stable and reliable, and it is resistant to high temperature, shock and wear. Long service life, easy to install and use.
If you need to Measura Oilfield Wastewater with Electromagnetic Flowmeter, or have any technical questions about Oilfield Wastewater, please feel free to contact our engineers.
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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 meter is an instrument used to measure and indicate the volume or mass of a gas or liquid. Simply put, it is an instrument used to measure the flow of fluid in pipes or open channels. Also known as flow indicator, liquid flow meter, flow sensor, etc.
Flowmeters are further divided into differential pressure flowmeters, rotameters, throttling flowmeters, slit flowmeters, volumetric flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, etc. According to the medium, it can be divided into: liquid flowmeter and gas flowmeter.
Flow meter calibration is carried out according to the verification regulations of various flow meters promulgated by the National Metrology Bureau.
For the flowmeters used, except for the standard throttling device, no experimental verification is required. The rest of the flowmeters are almost all verified when they leave the factory. During the use of the flowmeter, it should also be calibrated frequently.
The calibration methods of liquid flowmeter mainly include volumetric method, mass method, standard volume tube method and standard flowmeter comparison method.
The calibration methods of gas flowmeter mainly include sonic nozzle method, servo standard flowmeter comparison method and bell jar method.
Why is it important to calibrate a flow meter?
Most people recognize that a flow meter should be calibrated before it is put into service, but why is flow meter calibration so important?
The flow meter calibration process involves comparing the flow meter to a reference device used as a calibration standard. Calibration of reference equipment should be traceable to national or international standards. The next step involves adjusting the flow meter (if necessary) to counteract any errors.
If, like thousands of other facilities, flow meters are used in your process, it makes good business sense to ensure that the flow meters you use are giving you accurate and consistent information.
No matter what fluid you are metering, the liquid, gas or steam used in the process is most likely a valuable commodity. Accurate flow meter performance is therefore an invaluable part of business planning and costing.
At the same time, Calibration Flow Meters are also very important for the control of material consumption in our industrial production process. Can effectively improve production efficiency. reduce manufacturing cost.
Flow Meter Calibration vs. Recalibration
Flow Meter Verification (Verification): Refers to the process of identifying and confirming whether measuring instruments meet the statutory requirements. It includes inspection, marking and/or issuing a certificate.
Flow Meter Calibration (Calibration): refers to the determination of the value indicated by a measuring instrument or measuring system, or the value represented by a physical measuring tool or reference material, and the corresponding value reproduced by a standard under specified conditions. A set of operations on relationships.
After reading the definition, there must be some confusion, right? We usually summarize the main differences between verification and calibration into nine aspects:
Different purposes;
Objects are different;
According to different;
Different in nature;
The cycle is different;
In different ways;
The content of the certificate is different;
Different conclusions;
The authorities are different.
For quick understanding, we simply organize the following table:
Verification and Calibration
Verification
Calibration
Definition of Terms
Refers to the process of identifying and confirming whether measuring instruments meet the statutory requirements, which includes inspection, marking (or) issuing a verification certificate.
Refers to a set of operations to determine the relationship between the value indicated by a measuring instrument or measuring system, or the value represented by a physical measuring tool or reference material, and the corresponding value reproduced by the standard under specified conditions .
Character
It belongs to mandatory verification and has legality;
Users can voluntarily trace the source, which is not legal;
Certificate form
If the test result is qualified, a “Certificate of Test” shall be issued; If it is unqualified, a “Notification of Verification Result” shall be issued
Usually a “Calibration Certificate” or “Calibration Report” is issued; calibration results can also be expressed in the form of calibration curves or calibration factors
Specific method
According to the verification regulations, each point is verified 3 times at 100%, 50%, 20% and 100% of the full scale. If the original coefficient is qualified, the coefficient is not adjusted in principle.
According to the calibration procedure, at 100%, 50%, 20% and 100% of the full scale each point 3 times, adjust the coefficient to obtain the best performance near the user’s actual flow. The nameplate remains the same, but the certificate reflects the change.
How to Calibrate a Flow Meter？
The volumetric method is the most commonly used. This is a method of measuring the volume of fluid flowing into a constant volume container within the measurement time to obtain the flow rate.
The figure below is a schematic diagram of the typical structure of the static volume method water flow verification device. Verify the flow meter with pulse output, and replace 21 for verification of other output flow meters.
The commutator 13 is used to change the flow direction of the fluid so that water flows into the standard container (the standard container 15 or 16 can be selected according to the flow rate). The pulse counting controller 21 is triggered when the commutator 13 starts. To ensure the simultaneous measurement of water and pulse signal counts.
When calibrating, use the pump to draw the test fluid from the liquid storage container into the high level water tank. Then through the school flow meter. If standard container 15 is selected, then close drain valve 17, open drain valve 18, and commutator 13 is placed in the position that makes water flow to standard container 16.
After the flow is stabilized, the commutator 13 is started. Water flow is changed into standard container 15 by standard container 16. At the same time, the trigger pulse counter accumulates the pulse number of the calibrated flowmeter. When the predetermined water volume or preset pulse number is reached, the commutator will automatically change direction. Water flow is changed into standard container 16 by standard container 15. Read off the volume V of the fluid that enters the standard container during this period of time from the scale on the reading glass tube of the container. Record the number of pulses N displayed by the pulse count control 21 for the flow meter being calibrated.
Compare the pulse number N of the calibrated flowmeter with the obtained standard volume V to determine the instrument constant and accuracy of the calibrated flowmeter. The instantaneous flow rate of the flowmeter is indicated by the frequency indicator 20 .
The system accuracy of this method can reach 0.2%.
When calibrating, use a pump to draw the test fluid from the liquid storage container through the flowmeter to be calibrated and then enter the container containing the liquid. Measure the temperature of the fluid while weighing it out. It is used to determine the density value of the measured fluid at this temperature.
The volume of the fluid can be obtained by dividing the weight of the measured fluid by the density of the fluid at the measured temperature. Compare it with the volume indication (accumulated pulse number) of the meter. The meter constant and accuracy of the flowmeter to be calibrated can be determined.
The accuracy of this method system can reach 0.1%
The working principle of the standard volumetric tube method is based on the volumetric method (standard volumetric method), but it is a dynamic measurement.
The standard flowmeter comparison method is to connect the flowmeter to be calibrated and the standard flowmeter in series on the pipeline flowing through the test fluid. The error is calculated by comparing the two measured values. The accuracy of the standard flowmeter is 2 to 3 times higher than that of the schooled flowmeter.
The sonic nozzle gas flow standard device is a standard instrument based on the sonic nozzle. It is used to verify mass flowmeters, velocity flowmeters, volume flowmeters, rotameters, differential pressure flowmeters or other types of flowmeters. It is a standard device for measurement and testing units and large enterprises to measure and calibrate gas flowmeters.
According to the principle of aerodynamics, when the pressure ratio between the upstream and downstream of the factor nozzle reaches a critical state, the throat airflow reaches the peak velocity, and the mass flow through the nozzle also reaches the peak value. This value is only related to the parameter at the nozzle inlet and is not affected by changes in downstream conditions. Based on the above principles, this system uses the sonic nozzle as a standard meter to calibrate the measured flowmeter.
Many users search How to Calibrate a Flow Meter? In order to understand how to adjust the accuracy of the flowmeter in your own working conditions.
On-site “flow comparison” means that the flowmeter is compared with other “reference flows” on site.
For example, the measured value of the temporarily clamped ultrasonic flowmeter, the volume of the liquid that has been measured over the flow in the piping system, etc. can be used as the “reference flow”.
For the meaning of terms such as on-site calibration, comparison and verification, please refer to the standard definitions in relevant documents, and will not repeat them here.
In practice, many professionals have explored various on-site comparison methods and indirect inspection methods. There are mainly 3 types:
(1) Use the container weighing method comparison of storage containers, working containers, pools or weighing instruments in the process. The pool volume comparison method is often used by water supply companies. Water plants can obtain high comparison accuracy by taking advantage of the favorable conditions of large-volume clear water pools.
(2) Reserve a position in the pipeline of the flowmeter to be tested for the flowmeter comparison method of connecting the reference flowmeter.
(3) Ultrasonic flowmeter comparison method of Clamp-on ultrasonic transducer. Clamp-on ultrasonic flowmeter is one of the three most promising methods of flow measurement. Especially the measurement accuracy error of existing foreign products is < ± 0.5%. This is conducive to the establishment of high-precision comparative detection and on-site online calibration system. It is convenient for the metrology and verification department to go to the site for calibration and testing.
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The above is “How to Calibrate a Flow Meter?” I hope it will be helpful to everyone.
Flowmeter calibration method is the trend of measurement technology development. In particular, the use of portable ultrasonic flowmeters to carry out online flowmeter calibration is a feasible method. It can greatly facilitate the on-site measurement and calibration work. It can effectively reduce the capital consumption in metering and is easy to popularize and apply.
The data shows that through the research and application of on-site calibration technology for flow metering instruments. Can improve the measurement detection level. , to achieve the purpose of periodic measurement verification. To make the online flowmeter measurement data accurate and reliable, as long as it is operated accurately. Minimize random and additive errors. It can meet the requirements of the relevant state departments for the accuracy of industrial and civil water measurement.
Sino-Inst is a manufacturer of Calibration Flow Meters. We offer more than 50 Calibration Flow Meters.
Sino-Inst provides customers with professional and targeted system solutions to help customers solve various problems encountered in production, optimize control and improve product quality.
If you need to purchase flowmeters, or consult technical questions about flowmeters, please feel free to contact us.
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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.
Turbine Flow Meter Installation Guidelines and Troubleshooting is compiled based on our Sino-Inst’s many years of experience in producing and supplying turbine flow meters. Whether it is a liquid turbine flow meter or a gas turbine flow meter. In order to ensure that the measurement of the turbine flowmeter is accurate. The installation location and installation precautions must be correctly selected.
The sensor should be installed in a place that is easy to maintain, has no vibration in the pipeline, and is not affected by strong electromagnetic interference and heat radiation.
A typical installation piping system for a turbine flowmeter is shown in the figure.
The configuration of each part in the figure depends on the situation of the measured object, not necessarily all of them.
Turbine flowmeters are sensitive to distortion of flow velocity distribution and swirling flow in the pipeline, and the flow into the sensor should be fully developed. Therefore, the necessary straight pipe section or flow regulator should be equipped according to the type of choke on the upstream side of the sensor, as shown in the table below.
If the condition of the upstream side choke is not clear, it is generally recommended that the length of the upstream straight pipe section is not less than 20D, and the length of the downstream straight pipe section is not less than 5D. If the installation space cannot meet the above requirements, a flow regulator can be installed between the choke and the sensor.
When the sensor is installed outdoors, measures should be taken to avoid direct sunlight and rain.
Type of spoiler on the upstream side
Single 90° elbow
Two 90° elbows on the same plane
Two 90° elbows on different planes
Concentric reducer
Fully open valve
Hhalf open valve
Downstream side length
L/DN
20
25
40
15
20
50
5
Installation Requirements for Connecting Pipelines
The sensor installed horizontally requires that the pipeline should not have a visually detectable inclination (generally within 5°). The verticality deviation of the sensor pipe installed vertically should also be less than 5°. The fluid direction must be upward when installed vertically.
Where continuous operation is required and the flow cannot be stopped, bypass pipes and reliable stop valves should be installed. When measuring, make sure that there is no leakage in the bypass pipe.
In the position where the sensor is installed in the newly laid pipeline, a short pipe is first inserted to replace the sensor. After the “line sweeping” work is completed and the pipeline is cleaned, the sensor is formally connected. Due to neglect of this task, it is not uncommon for wire sweeping to damage the sensor.
If the fluid contains impurities, a filter should be installed on the upstream side of the sensor. For those that cannot stop the flow, two sets of filters should be installed in parallel to remove impurities in turn, or self-cleaning filters should be selected.
If the measured liquid contains gas, a muffler should be installed on the upstream side of the sensor. The sewage outlet and air elimination outlet of the filter and muffler should lead to a safe place.
If the installation position of the sensor is at the low point of the pipeline, in order to prevent the impurities in the fluid from settling and stagnating. A discharge valve should be installed in the subsequent pipeline to discharge the precipitated impurities regularly.
The flow regulating valve should be installed downstream of the sensor, and the stop valve on the upstream side should be fully open when measuring. And these valves must not produce vibration and leak outward. For processes that may generate reverse flow, check valves should be added to prevent reverse flow of fluid.
The sensor should be concentric with the pipe, and the sealing gasket should not protrude into the pipe. Liquid sensors should not be installed at the highest point of the horizontal pipeline. In order to prevent the gas accumulated in the pipeline (such as mixed gas when the flow is stopped) staying at the sensor, it is not easy to discharge and affect the measurement.
The pipelines before and after the sensor should be supported firmly without vibration. For condensable fluids, thermal insulation measures should be taken for the sensor and its front and rear pipelines.
Installation Requirements
The pipe must be completely filled with liquid. It is important to keep the tubing completely filled with fluid at all times. Otherwise the traffic display will be affected. Measurement errors may result.
Avoid air bubbles. If air bubbles enter the measuring tube, the flow display may be affected, possibly causing measurement errors.
Straight pipe requirements
Generally
90° elbow
Two 90° elbows on the same plane
Two 90° elbows on different planes
shrink tube
Expansion
Fully open valve
half open valve
If the condition of the upstream side choke is not clear, it is generally recommended that the length of the upstream straight pipe section is not less than 20D, and the length of the downstream straight pipe section is not less than 5D.
If the installation control cannot meet the above requirements, a rectifier can be installed between the baffle and the sensor.
Gas Turbine Flow Meter Installation Guidelines
When installing the Gas Turbine Flow Meter, the user must carefully read the following content. Because the condition of the installation of the flowmeter directly affects the accuracy and life of the flowmeter, and even safety issues during work.
The installation work must be performed by personnel with corresponding pipeline equipment installation skills;
The flowmeter should be installed in a place that is convenient for maintenance, no strong electromagnetic field interference, no mechanical vibration and thermal radiation influence;
When the flowmeter is installed outdoors, there should be a cover on the upper part to prevent rainwater and hot sun from affecting the service life of the flowmeter;
When the flowmeter is installed, it is strictly forbidden to conduct electric welding directly at its inlet flange to avoid burning the internal parts of the flowmeter;
The newly installed or overhauled pipeline must be cleaned, and the flowmeter can be installed after removing the debris in the pipeline;
The flowmeter can only be installed horizontally, not vertically. The fluid flow direction should be consistent with the direction marked on the housing. There should be a straight pipe section ≥ 2DN upstream of the flowmeter, and a straight pipe section ≥ 1DN downstream of the flowmeter. Straight pipe section, and the filter of the corresponding specification must be installed at the upstream of the flowmeter (≥2DN) (the company can match) to prevent excessive particulate impurities in the pipeline from entering the flowmeter and affecting the service life of the meter;
The flowmeter should not be used in occasions where the flow is frequently interrupted and there is a strong pulsating flow or pressure pulsation;
Ensure that the connection between the pipeline and the inlet and outlet of the flowmeter is coaxial, and prevent gaskets and welds from protruding into the pipeline, otherwise the flow profile will be disturbed;
In order to facilitate the maintenance of the instrument, it is recommended to install the bypass pipeline according to Figure 6. Open the bypass when the instrument is maintained so as not to affect the normal production, and close the bypass pipeline during normal use.
When the flowmeter is put into operation, the upstream valve of the flowmeter should be slowly opened, and then the downstream valve of the flowmeter should be slowly opened, so as to avoid the instantaneous air flow that will destroy the turbine flowmeter;
The flowmeter must be reliably grounded as specified, but must not share the ground wire with the strong current system; during pipeline installation or maintenance, the ground wire of the electric welding system must not be overlapped with the flowmeter;
During use, users are not allowed to change the connection method of the explosion-proof system and change the lead interface arbitrarily;
1. There is no display when the liquid flows normally, and the cumulative volume does not increase
1) The power supply circuit or signal circuit is disconnected or poorly connected. Troubleshooting method: check with a multimeter to eliminate the fault point;
2) The printed circuit board of the display instrument, the connector is faulty or the contact is poor. Remedy: replace the printed circuit board;
3) The preamplifier is faulty. Troubleshooting method: Use an iron bar to move quickly under the detection head, if there is no signal output, check whether the coil is disconnected or the solder joint is desoldered;
4) The voltage supplied to the preamplifier is too low. Troubleshooting method: increase the power supply voltage to the specified requirements;
5) The impeller is stuck and does not rotate. Troubleshooting method: remove foreign matter, and clean or replace damaged parts, and re-calibrate after replacing parts;
2. When the flow is zero, the flow display is not zero, and the displayed value is unstable
1) Poor shielding and grounding of the transmission line, interference from the external electromagnetic field. Troubleshooting method: check the grounding and eliminate interference;
2) The pipeline vibrates, causing the impeller to vibrate. Troubleshooting method: strengthen the pipeline or install brackets before and after the flowmeter;
3) The shut-off valve is leaking. Troubleshooting method: overhaul or replace the valve;
4) Interference between circuit boards or electronic components inside the display is deteriorated and damaged. Troubleshooting method: take short circuit method”” or check one by one to find out the fault point;”
3. The displayed traffic does not match the actual traffic
1) The impeller is corroded and the blades are deformed. Troubleshooting method: Repair the impeller or re-calibrate after replacement;
2) The sundries hinder the rotation of the impeller. Troubleshooting: Clearing Debris;
3) The output signal of the detection coil is abnormal. Troubleshooting method: check the coil insulation resistance and conduction resistance;
4) The bypass valve is leaking. Troubleshooting method: close the bypass valve and replace it if necessary;
5) The flow velocity distribution upstream of the flowmeter is distorted or pulsating flow occurs. Troubleshooting method: find out the cause of distortion or pulsating flow, and take measures to eliminate it;
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Sino-Inst, Manufacuturer for Turbine Flow Meters, like: gas turbine flow meter, liquid turbine flow meter, sanitary turbine flow meter, insertion turbine flow meter, steam turbine flow meter, and natural gas turbine flow meter.
Sino-Inst’s Turbine 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.
If you have any questions about Turbine Flow Meter Installation Guidelines and Troubleshooting, please feel free to contact us.
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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.
Sea Water Flow Measurement is becoming more and more important to many industries. Seawater can be directly used as production water in printing and dyeing, pharmaceutical, alkali making, rubber and seafood processing industries. Since seawater is widely used, the measurement and control of seawater flow is also crucial.
Sino-Inst supplies various sea water flow meters. Seawater is a kind of salt water, which is highly corrosive. Electromagnetic flowmeter and ultrasonic flowmeter are the most widely used in Sea Water Flow Measurement.
Seawater stores 96.54% of the earth’s fresh water, which contains a huge amount of minerals, energy and other resources. The current forms of seawater resources development and utilization mainly include: seawater desalination, direct utilization of seawater and utilization of seawater chemical resources.
In seawater desalination
In coastal cities and islands where water resources are seriously short. Mainly large-scale industrial seawater desalination projects. Mainly concentrated in high water consumption industries such as electric power and steel. Seawater desalination projects for islands used in offshore cities.
In terms of direct use of seawater
Mainly for seawater cooling applications. Among them, seawater DC cooling technology is mature and is mainly used in coastal thermal power, nuclear power, petrochemical, steel and other industries. Seawater circulating cooling technology has been gradually applied in the coastal power industry.
In the utilization of seawater chemical resources
It mainly includes salt production from seawater, potassium extraction from seawater, bromine extraction from seawater, magnesium extraction from seawater, etc. In addition to seawater salt production, the main products include bromine, potassium chloride, magnesium chloride, magnesium sulfate, and potassium sulfate.
Therefore, the utilization rate of seawater is getting higher and higher. Even in the future, people will find more favorable treatment and utilization of seawater. Among them, flow measurement before and after seawater treatment, or flow measurement before and after seawater use will become more and more important.
Difficulties in sea water measurement
Seawater is a highly corrosive fluid. Seawater is a very complex multi-component aqueous solution, which contains various ions such as sodium, potassium, calcium, magnesium, copper, zinc, manganese, etc. Its salt content is very high and it is highly corrosive.
Simultaneously, waves and tides create low-frequency mutual stress and impact metal parts. Marine microorganisms, attached organisms and their metabolites also produce direct or indirect accelerated corrosion processes.
Marine corrosion is mainly localized corrosion, which starts at the surface of the component and occurs in a small area. Examples include galvanic corrosion, pitting and crevice corrosion.
Therefore, it is very necessary to consider corrosion issues when selecting seawater flowmeter sensors.
Magnetic flowmeter to measure sea water
Electromagnetic flow is the preferred flowmeter for measuring the volume flow of liquids with a certain conductivity. Electromagnetic flowmeter is a flow measuring instrument that works based on the principle of electromagnetic induction. It consists of sensors and transmitters.
Advantages
There are no moving parts and bluff bodies in the measuring conduit. Therefore, the pressure loss is very small, and there is no mechanical inertia, so the response is sensitive;
Wide measurable range: the turndown ratio is generally 10:1, up to 100:1. The flow velocity range is generally 1-6m/s, and can be extended to 0.5-10m/s. The flow range can be from 90mL/h to hundreds of thousands of m3/h. Pipe diameters can range from 2mm to 2400mm or 3000mm.
It can measure the volume flow of liquids containing solid particles, suspended matter, or acids, alkalis, and salt solutions with certain conductivity. It can also measure pulsating flow, and can carry out two-way measurement.
There is a linear relationship between the flow signal and the fluid volume flow, so the meter has a uniform scale. And the volume flow rate of the fluid has nothing to do with the physical properties and flow state of the medium. Therefore, the electromagnetic flowmeter only needs to be calibrated with water, and it can be used to measure the volume flow of other conductive liquids without correction.
Compared with most other flow meters, the requirements for the front straight pipe section are lower.
Disadvantages
The temperature and pressure should not be too high;
The scope of application is limited. It cannot be used to measure the flow of non-conductive fluids such as gas, steam and petroleum products, and fluids containing more and larger bubbles;
When the flow rate and velocity distribution do not meet the set conditions, large measurement errors will occur;
When the flow rate is too low, it is difficult to amplify and measure the induced potential of the order of magnitude opposite to the interference signal. And the instrument is also prone to zero drift;
The signal of the electromagnetic flowmeter is relatively weak. A little interference from the outside world can affect the accuracy of the measurement.
Ultrasonic flowmeters are instruments that measure volume flow by detecting the action of ultrasonic beams (or ultrasonic pulses) when fluid flows.
The sound wave propagates in the fluid, and the sound wave propagation speed will increase in the downstream direction. , the countercurrent direction decreases, and the same propagation distance has different propagation times. The propagation time method is to calculate the flow velocity by using the relationship between the difference of the propagation velocity and the flow velocity of the measured liquid. Combined with the pipe diameter to obtain the flow rate.
Advantages
Ultrasonic flowmeter can be used for non-contact measurement. The clip-on transducer ultrasonic flowmeter can be installed without stopping the flow-carrying tube. Just install the transducer outside the pipeline to be tested. That is, the flow can be measured with an ultrasonic flowmeter on existing pipelines that cannot be cut off or drilled;
Ultrasonic flowmeters measure without flow obstruction. No additional pressure loss;
The instrument factor of the measuring meter can be calculated from the geometric dimensions of the actual measurement pipe and sound channel. The dry method can be used for calibration. Except for the type with measuring pipe section, it generally does not need to do real flow calibration;
The ultrasonic flowmeter in the propagation time method can only be used for clean liquids and gases, and cannot measure liquids with suspended particles and air bubbles exceeding a certain range. On the contrary, the Doppler method LSF can only be used to measure liquids containing certain heterogeneous phases;
Ultrasonic flowmeters with external transducers cannot be used in lined or heavily scaled pipes. And it cannot be used for stripping the lining (or rust layer) from the inner pipe. If there is gas in the interlayer, the ultrasonic signal will be seriously attenuated. Or pipes with severe corrosion (changing the ultrasonic path);
In most cases, the Doppler method ultrasonic flowmeter has a low measurement rate;
It cannot be used for pipes with a diameter smaller than DN15mm.
So, which flow meter should you choose for Sea Water Flow Measurement or salt water flow? We believe that:
If the seawater concentration is low and the salinity is small.
Then ultrasonic flowmeter is a better choice. Such flow meters do not require contact with seawater and avoid corrosion. At the same time, its flow sensor is not a metal part and is not afraid of corrosive materials.
For this type of seawater, if you choose an electromagnetic flowmeter. Then a 316L stainless steel electrode and rubber lining material should work well.
If the seawater has high concentration and high salinity.
Then the external clamp ultrasonic flowmeter is a better solution.
If you want to choose an online electromagnetic flowmeter for better performance. The best choice is Hastelloy C electrode and PTFE lining material. Hastelloy C electrodes are suitable for oxidation of salts such as Fe++, Cu++ and seawater.
For seawater desalination projects, plastic pipes are mainly used as water delivery equipment.
Many pipes are in the air. If an in-line electromagnetic flowmeter is used, the electromagnetic flowmeter is heavy. And the plastic tube doesn’t hold it in place very well. As a result, support brackets have to be installed, which adds a lot of cost and inconvenience.
Therefore, we recommend using a transit-time ultrasonic water flow meter. No pipe cutting required, light weight, easy installation, no maintenance etc.
If it is to measure the pipeline above DN3000.
Then the external clamp ultrasonic flowmeter is a better choice. For large diameter pipes, clamp-on ultrasonic flowmeters are less costly.
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Sino-Inst is a manufacturer of electromagnetic flowmeters and ultrasonic flowmeters. It has been used for sea water-salt water flow measurement for a long time.
Sino-Inst supplies more than 30 types of seawater flow meters for sea water flow measurement. 55% are electromagnetic flowmeters and 45% are ultrasonic flowmeters.
Electromagnetic flowmeters and ultrasonic flowmeters have their own advantages in Sea Water Flow Measurement. You can choose the appropriate model based on your measurement needs and cost budget.
Sino-Inst’s Sea Water Flow Measurement – Magnetic vs Ultrasonic Flowmeters are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military chemicall, military industry, electric power, ship, machine tool, pipeline and other industries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Sea Water Flow Meter, level sensors, or other equipment, please give us a call.
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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.
High pressure rotameter is suitable for flow measurement of high pressure liquid and gas. Standard type rotameter: DN15-DN50, can withstand 4.0MPa. High pressure rotameter: DN15-DN50, can withstand 25MPa. The pressure level of the jacket is 1.6MPa, and the special type should be negotiated with our engineers before selecting and ordering. High temperature metal tube rotameter can be applied to temperature range: 100℃~450℃ The high-pressure rotameter adopts an advanced magnetic sensor that detects the change of the magnetic field angle without contact. And with a microprocessor system. It can realize liquid crystal indication, accumulation, and remote transmission (4-20Ma). Pulse output, upper and lower limit alarm output and other functions. This type of intelligent signal transmitter has high precision and reliability.
The high-pressure metal tube rotameter is the force that the upper and lower ends of the float generate differential pressure to form a rising force when the measured medium passes through the conical measuring tube from bottom to top.
When the lifting force on the float is greater than the weight of the float immersed in the fluid, the float will rise. The area of the annulus will increase accordingly. The fluid velocity at the annulus will drop immediately. The differential pressure at the upper and lower ends of the float will decrease. The float is stabilized at a certain height until the lift force is equal to the weight of the float immersed in the fluid.
The height of the float position corresponds to the flow rate of the measured medium.
The float has a built-in magnet. When the float moves up and down with the medium, the magnetic field changes with the movement of the float.
a. For the local type, the rotating magnet in the local indicator is coupled with the magnetic steel in the float to rotate. At the same time, the pointer is driven to indicate the flow rate at this time through the dial.
b. For the intelligent type, the change of the magnetic field is converted into an electrical signal by a solid-state magnetic sensor in the intelligent indicator. After A/D conversion, microprocessor. D/A output, LCD liquid crystal display, to display the flow rate size and cumulative flow.
All-metal structure design. Sturdy, simple, high pressure resistance, high temperature resistance, anti-corrosion, long service life;
Short stroke, total height 250mm, easy installation;
The mechanical pointer indicates the instantaneous flow on the spot. LCD liquid crystal displays the instantaneous flow and cumulative flow;
Intelligent indicator. Using signal acquisition and processing chip, modular design, no magnetic lag;
With data recovery, data backup, power failure protection and error self-diagnosis functions;
HART type indicator, two-wire 24VDC power supply. 4-20mA standard current signal output superimposed with HART protocol;
Parameter configuration and on-site adjustment can be performed through the HART communication hand-held communicator;
Connect with the PC serial port. Through the Windows program, the instrument can be calibrated on site;
Can be used in flammable and explosive hazardous situations;
Various installation forms such as vertical, horizontal, top in and bottom out, bottom in and side out, side in and side out. Flange or threaded connection.
High Pressure Rotameter Applications:
The metal tube rotameter has a simple structure, reliable operation, high accuracy and wide application range. Can withstand higher pressures than glass rotameters.
LZ series flowmeters have local indication, electric remote transmission, limit switch alarm, corrosion resistance, jacket type, damping type and explosion-proof varieties.
It is widely used in the measurement and automatic control of liquid and gas flow in national defense, chemical industry, petroleum, metallurgy, electric power, environmental protection, medicine and light industry and other departments.
What Is Difference Between Rotameter and Flow Meter?
A rotameter is a device that measures the flow rate of liquid or gas in a closed system. It consists of a float that moves up and down in a tube, based on the fluid’s flow rate. The faster the fluid flows, the higher the float rises.
A flowmeter is a device that measures the volume of liquid or gas that flows through it. There are many different types of flowmeters, each designed to measure different types of fluids. For example, positive displacement flowmeters measure the volume of fluid that passes through them, while rotameters measure the rate of flow.
Choosing the right flow meter can be difficult, because there are so many different types available on the market. How do you know which one is right for your specific application?
Sino-Inst offers a wide range of high pressure flow meters that are specifically designed to operate in demanding applications. Our high pressure flowmeters are made from stainless steel construction and are ideal when measuring the flow of fluids under high pressures.
Yes, rotameters are affected by changes in pressure. When the pressure decreases, the rotameter will read a lower flow rate. Similarly, when the pressure increases, the rotameter will read a higher flow rate. This is because the rotameter measures the fluid’s velocity, and changes in pressure will affect the fluid’s velocity. Therefore, it is important to keep the rotameter’s pressure at a constant level if you want to accurately measure the flow rate.
The flow detection element of the rotameter is composed of a vertical tapered tube that expands from bottom to top and a float group that moves up and down along the axis of the tapered tube. Below, I will give you a specific introduction to the classification of rotameters.
Glass rotameter:
Glass rotameters are mainly used in various departments such as the chemical industry, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dyes, environmental protection, and scientific research. Used to measure the flow of single-phase non-pulsating (liquid or gas) fluids. The anti-corrosion glass rotor flowmeter is mainly used for the detection of corrosive liquid and gas medium flow. Such as strong acid, strong acid, oxidant, strong oxidizing acid, organic solvent, and other corrosive gas or liquid medium flow detection.
The main parts such as the liquid plastic tube rotameter cone tube are made of AS, ABS plastic. Has relatively good corrosion resistance. The product also has the characteristics of reasonable structure, small size, lightweight, and the tapered tube is not easily broken. The plastic tube rotor flowmeter can be widely used in chemical, environmental protection, food, and other industrial sectors.
Plexiglass rotameter:
Plexiglass rotameter is divided into panel type plexiglass rotameter and pipeline type plexiglass rotameter.
Plexiglass rotameter also has the characteristics of high transparency, intuitive reading, not easy to break, lightweight, long life, and convenient installation and connection. However, the tapered glass tube of plexiglass cannot be used for organic solvents (such as trichloroethylene, dichloroethane).
Metal tube rotameter:
Metal tube rotameter is divided into on-site pointer indication type and remote transmission type.
Metal float flowmeter is a kind of flow measuring instrument commonly used in industrial automation process control. It has the characteristics of small pressure loss, large detection range (range ratio 10:1), and convenient use. It can be used to measure the flow of liquid, gas, and steam. It is especially suitable for medium flow measurement with low flow velocity and small flow.
The metal float flowmeter has a local display type and an intelligent remote transmission type. With pointer display. Instantaneous flow, cumulative flow, liquid crystal display. Upper and lower limit alarm output. Cumulative pulse output, standard two-wire 4-20mA current output, and other forms. Provide users with a very wide choice of space. In addition, the instrument uses a high-quality MCU micro-processing system. Ensure the excellent performance of the flowmeter in various applications.
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High Pressure Rotameter for Liquids/gas-Upto 25 Mpa is mainly used for small and medium diameter flow measurement. It can measure liquid, gas, steam, etc. Complete product series specifications, in all walks of life are widely used.
High Pressure Rotameter for Liquids/gas-Upto 25 Mpa can be stable flow measurement without modifying the pipeline. This greatly meets the measurement needs of many applications. From small tubes to large tubes can be used.
Sino-Inst’s High Pressure Rotameter for Liquids/gas-Upto 25 Mpa, made in China, have good quality, with better prices. Our flow measuring instruments are widely used in China, India, Pakistan, USA and other countries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a metal tube flow meters, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
