Industrial Gas Measurement with Digital Gas Mass Flow Meters

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.

Digital Gas Mass Flow Meters

Featured Digital Gas Mass Flow Meters For Sale

Benefits of Digital Gas Mass Flow Meters

Advantages of Thermal Mass Flow Meters.

  • Measuring the mass flow or volume flow of gas;
  • 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;

Read more about: Thermal mass flow meter working principle

Advantages of Coriolis Mass Flow Meters.

  • 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;
  • Reliable operation and low maintenance rate;

Read more about:

How does a Coriolis flow meter work?

Micro Motion Coriolis Flow Meter Working Principle

Applications of Digital Gas Mass Flow Meters

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.

More Gas Flow Measurement Solutions

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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How to Calculate Pressure Drop in a Pipe?

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!

5 Factors Affecting Pressure Drop

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.

Read more about: Shop 101: Key Factors In Selecting A Pipe Flow Meter

Calculation of Pressure Drop

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.

Read more about: Flow Rate And Pressure Relationship

Online Pressure Drop Calculators and Software

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.

For example: Pressure Drop Online-Calculator

Flow Meter Pressure Drop

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.

Featured Inline Flow Meters

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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Measuring Oilfield Wastewater with Electromagnetic Flowmeter

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.

Difficulties in Oilfield Wastewater Measurement

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.

  1. 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;
  2. Turbine flowmeters used in different pipelines and process links are not universal. On-site instrument maintenance is difficult;
  3. The flow rate of the 2-inch pipe is less than 70 cubic meters per day. The micro-flow turbine flowmeter cannot measure accurately;
  4. 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;
  5. 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:

  1. 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.

  1. 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

The advantages and working principles of electromagnetic flowmeters have been mentioned in many pages. I won’t repeat it here.

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:

  1. 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.

  1. 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.

  1. 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.

  1. 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.

Featured Magnetic Flow Meters

More solutions for wastewater flow measurement

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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Turbine Flow Meter Installation Guidelines and Troubleshooting

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.

Liquid Turbine Flow Meter Installation Guidelines

Installation Location

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.

1 – entrance;
2-valve;
3 – filter;
4 – air eliminator;
5- front straight pipe section;
6 – sensor;
7- rear straight pipe section;
8-Bypass

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 sideSingle 90° elbowTwo 90° elbows on the same planeTwo 90° elbows on different planesConcentric reducerFully open valveHhalf open valveDownstream side length
L/DN2025401520505

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

  1. 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.
  2. Avoid air bubbles. If air bubbles enter the measuring tube, the flow display may be affected, possibly causing measurement errors.

Straight pipe requirements

  1. Generally
  2. 90° elbow
  3. Two 90° elbows on the same plane
  4. Two 90° elbows on different planes
  5. shrink tube
  6. Expansion
  7. Fully open valve
  8. half open valve
  9. 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.
  10. 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;

Read more about: What are the application of turbine flow meters?

Turbine Flow Meter Installation Troubleshooting

Fault phenomenonCauses and Solution
1. There is no display when the liquid flows normally, and the cumulative volume does not increase1) 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 unstable1) 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 traffic1) 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;

6) Display instrument failure. Troubleshooting method: repair display instrument;

7) The wiring of the display instrument is incorrect. Troubleshooting method: Correct the wiring;

8) Display instrument setting error. Troubleshooting: Correct settings;

9) The actual flow exceeds the specified flow range. Troubleshooting method: replace the flowmeter with a suitable caliber;

Featured Turbine Flow Meters for Sale

Frequently
Asked
Questions

Yes.
The flowmeter can be installed vertically.
As long as the full pipe measurement of the flowmeter is satisfied.

If the flowmeter is divided into 5 categories. Then the five commonly used flowmeters are:

  1. Electromagnetic flowmeter
  2. Differential pressure flowmeter
  3. Turbine flowmeter
  4. Ultrasonic flowmeter
  5. Volumetric flowmeter (PD)

More Flow Measurement Solutions

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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Sea Water Flow Measurement – Magnetic vs Ultrasonic Flowmeters

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.

Importance of 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

  1. 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;
  2. 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.
  3. 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.
  4. 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.
  5. Compared with most other flow meters, the requirements for the front straight pipe section are lower.

Disadvantages

  1. The temperature and pressure should not be too high;
  2. 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;
  3. When the flow rate and velocity distribution do not meet the set conditions, large measurement errors will occur;
  4. 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;
  5. The signal of the electromagnetic flowmeter is relatively weak. A little interference from the outside world can affect the accuracy of the measurement.

Extended Reading: Special Magnetic Flowmeter Installation situation

Featured Magnetic flow meters for sale

ultrasonic flowmeter to measure sea water

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

  1. 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;
  2. Ultrasonic flowmeters measure without flow obstruction. No additional pressure loss;
  3. 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;
  4. Ultrasonic flow meters are suitable for large round and rectangular pipes. And it is not limited by pipe diameter in principle. Its cost basically has nothing to do with the pipe diameter;
  5. Doppler ultrasonic flowmeters can measure liquids with high solid content or bubbles.

More about: Insertion Type Ultrasonic Flow Meter Applications

Disadvantages

  1. 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;
  2. 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);
  3. In most cases, the Doppler method ultrasonic flowmeter has a low measurement rate;
  4. It cannot be used for pipes with a diameter smaller than DN15mm.

Read more about: Flow Meter Selection Guide

Featured ultrasonic flow meters for sale

conclusion

So, which flow meter should you choose for Sea Water Flow Measurement or salt water flow?
We believe that:

  1. 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.

  1. 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.

  1. 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.

  1. 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.

Read more about: Hydrostatic Submersible Level Transmitter-Straight Rod Insertion

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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.

Request a Quote

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High Pressure Rotameter for Liquids/gas-Upto 25 Mpa

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 working principle of High Pressure Rotameter:

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.

Extended reading: High Pressure Flow Meters for Liquids-Steam-Gas

High Pressure Rotameter Features:

  1. All-metal structure design. Sturdy, simple, high pressure resistance, high temperature resistance, anti-corrosion, long service life;
  2. Short stroke, total height 250mm, easy installation;
  3. The mechanical pointer indicates the instantaneous flow on the spot. LCD liquid crystal displays the instantaneous flow and cumulative flow;
  4. Intelligent indicator. Using signal acquisition and processing chip, modular design, no magnetic lag;
  5. With data recovery, data backup, power failure protection and error self-diagnosis functions;
  6. HART type indicator, two-wire 24VDC power supply. 4-20mA standard current signal output superimposed with HART protocol;
  7. Parameter configuration and on-site adjustment can be performed through the HART communication hand-held communicator;
  8. Connect with the PC serial port. Through the Windows program, the instrument can be calibrated on site;
  9. Can be used in flammable and explosive hazardous situations;
  10. 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.

Read more about: Benefits Of Digital Gas Mass Flow Meters

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.

Read more about:

More Featured High Pressure Flow Meters for Liquids-Steam-Gas

Are high pressure flow meters the same as regular flow meters? Can high pressure flow meters be replaced by ordinary flow meters?
Of course not.

You need to measure the flow of fluids under high pressure, but you’re not sure which type of flow meter is best for your application.

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.

Read more about: High Pressure Flow Meters Types

Frequently
Asked
Questions

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.

Learn more about Flow Rate And Pressure Formula, which may help you calculate mass or volume flow.

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.

Extended reading: Gas Rotameter Tips

Plastic tube rotameter:

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.

Extended reading: Vortex Steam Flow Meter

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.

Extended reading: Beginner’s Guide: Variable area flow meter

More Featured Flow Measurement Solutions

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.

Extended Reading: What is difference between rotameter and flow meter

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

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Mechanical Diesel Flow Meters for High Precision Measurement

Mechanical diesel flow meter is a volumetric meter for continuous or intermittent measurement and control of diesel or other liquid flow in pipelines. It has many advantages such as large measuring range, high accuracy, small pressure loss, strong viscosity adaptability, ability to measure high temperature and high viscosity liquid (diesel), convenient calibration, and installation suggestions. It is suitable for flow measurement in petroleum, chemical, chemical fiber, transportation, commerce, food, medicine and health departments.

Sino-Inst mechanical diesel flow meter solutions come together here and allow you to select from various flow rates or technologies. When it comes to technologies, the turbine or oval gear type diesel flow meters can all be purchased directly from our website. We have a variety of mechanical diesel flow meters suitable for most fuels, including diesel, bio-diesel, kerosene, gasoline, oil, DEF, heating oil, grease and certain chemicals. mechanical Diesel fuel meters are available in several sizes from 1/2″ up to 8 “.

Featured Mechanical Diesel Flow Meters

Characteristics of Diesel Flow

Diesel is a kind of light petroleum, which belongs to the fuel of diesel engine. The use of high-speed diesel engines on cars is more fuel-efficient than gasoline engines.

Diesel demand is growing faster than gasoline. Diesel engines have higher thermal efficiency and higher power than gasoline engines. The fuel consumption per unit is low and relatively economical, so the application is increasing day by day. In many occasions, it needs to be measured.

For oil tanker or diesel storage tank pipeline transportation, it is more suitable to choose a flowmeter with higher measurement accuracy. Because it is not only convenient for trade settlement, but also high precision. The measurement is accurate and can be used for a long time.

According to the role of diesel: the use can be divided into marine diesel engine, locomotive diesel engine, automobile diesel engine, power generation diesel engine, agricultural diesel engine, construction machinery diesel engine, etc.

Diesel Fuel: Diesel fuel is primarily diesel. Light diesel oil is usually used for high-speed diesel engines. Light diesel or heavy diesel for medium and low speed diesel engines.

Extended reading: mechanical oil flow meter

Mechanical Diesel Flow Meter Working Principle

Oval gear flow meters are our most commonly used Mechanical Diesel Flow Meters.

The oval gear flowmeter is composed of a metering box and a pair of elliptical gears installed in the metering box, and the upper and lower cover plates form a sealed crescent-shaped cavity (due to the rotation of the gear, it is not sealed) as the calculation unit of a displacement .

The flow meter is mainly composed of a housing, a counter, an elliptical gear, and a coupling (magnetic coupling and axial coupling), etc. As shown in the figure.

1.Counter 2. Transmitter

3. Accuracy adjuster (used above DN50)

4. Sealed coupling

5. Front cover 6. Cover plate

7. Oval gear 8. Shell

9. Rear cover

When the measured liquid enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet pushes a pair of gears to continuously rotate, and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of four times the secondary displacement is the total amount of the measured liquid flow.

The elliptical gear generates a torque to make it rotate under the action of the pressure difference △p of the measured medium.

The rotor 1 and the rotor 2 are alternately driven by one to rotate the other. There are two magnets on each rotor as signal generating elements. There is a magnetic signal detecting element at the center of the two axes at the bottom of the cavity. Whenever the magnet turns to the detecting element, the sensor counts as a pulse.

Each pulse corresponds to a certain amount of medium discharge F, F=XXml/p, so the volume flow Qm per unit time can be obtained: Qm=F*H, F is the amount of medium removed by each pulse; H pulse per unit time number.

Read more about Mass Flow Rate vs Volumetric Flow Rate

Advantages of Oval Gear Mechanical Diesel Flow Meters

  • High measurement accuracy: 0.2 and 0.5;
  • The mechanism is simple, firm and reliable;
  • Especially suitable for measuring medium with high viscosity. And it is not sensitive to changes in the viscosity of the liquid being measured;
  • Easy to install. No straight pipe sections are required before and after the flowmeter. Even if the flowmeter is close to valves, elbows, shrinks, and expansions, there is no need to add straight pipe sections.
  • In order to prevent the gear of the flowmeter from being stuck by impurities. A filter must be installed upstream of the flow meter

Extended reading: Advantages of Oval Gear Mechanical Diesel Flow Meters

More Inline Digital Diesel Fuel Flow Meters

Frequently
Asked
Questions

It is a type of flowmeter, and the measurement component is a purely mechanical structure, which is a mechanical flowmeter. Such as oval gear flowmeter.

Extended Reading: Mechanical flow meter for diesel

Take an oval gear flowmeter as an example. Under the action of fluid flow, a pressure difference is formed between the inlet and outlet of the instrument. A pair of oval gears are constantly rotating on the shaft. The cavity between its gears is filled with liquid.

As the rotation is discharged, the flow rate of the liquid flowing through the meter can be known by measuring the number of revolutions of the oval gear.
Assume that the volume of the oval gear discharged by one rotation of the oval gear is Q. The number of rotations of the oval gear per unit time is N. Then the volume of liquid that flows during this time is NQ.

If we choose an oval gear flowmeter made of stainless steel, it can also be applied to the measurement of many chemical liquids.

Commonly used fuel flowmeters include turbine flowmeters, circular gear flowmeters, oval gear flowmeters, mass flowmeters, etc.

Industrial oil flow meters measure the volume or mass of oil. Can realize the mutual conversion of volume and mass.

The main industrial oils are hydraulic oil. Gear Oil. Turbine oil. Compressor oil. Refrigeration oil. Transformer oil. Cylinder oil, heat treatment oil, heat transfer oil, etc. Of course, edible oil can also be produced in the industry. In addition, there are greases with lubricating oil as base oil and thickening agent.

Therefore, whether it is a company that uses, trades, or produces oil, it needs to accurately measure the oil flow.

There are many common oil flow meters, such as turbine flow meters, positive displacement flow meters, gear flow meters, mass flow meters, etc.

Extended reading: Crude Oil Measurement – Radar Level Meter Measuring Vaulted Buffer Tank

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Read more about: The Pros and Cons of Micro Motion Flow Transmitters

Sino-Inst is Manufacturer of Mechanical Diesel Flow Meters for diesel flow measurement. We supply more than 20 kinds of Mechanical Diesel Flow Meters. 80% oval gear flow meter, 20% other types flow sensors.

Mechanical Diesel Flow Meters for diesel fuel measurement are mainly used for flow measurement of various oils pipes.

Mechanical Diesel Flow Meters enable stable flow measurement. This greatly meets the measurement needs of many applications. Can be used from small to large pipes.

Sino-Inst’s Mechanical Diesel Flow Meters for diesel fuel flow measurement, 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.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Mechanical Diesel Flow Meters for diesel measurement, flow sensor, or other device, give us a call.

Request a Quote

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High Pressure Flow Meters for Liquids-Steam-Gas

Are high pressure flow meters the same as regular flow meters? Can high pressure flow meters be replaced by ordinary flow meters?
Of course not.

You need to measure the flow of fluids under high pressure, but you’re not sure which type of flow meter is best for your application.

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.

If you’re not sure which high pressure flow meter is right for your application, please contact us and we will be happy to help you select the best model for your needs.

High Pressure Flow Meters Types

There are various types of high pressure flow meters available on the market including: positive displacement, turbine, magnetic, gear, coriolis mass flow meters. Each type of meter has its own advantages and disadvantages that should be considered when selecting a high pressure flow meter for a particular application. Read more about: Flow Meter Selection Guide

High pressure turbine flow meter is one of the most popular types of high pressure flow meters due to its high accuracy and repeatability. It is also relatively easy to install and maintain. High pressure turbine flow meters work by measuring the rotation of a turbine blade that is caused by the flow of fluid passing through the meter. It is the best choice for flow measurement of various high-pressure liquids and oils.

The housing is made of stainless steel. The meter has a simple structure and optimized structural design. High-pressure butt-weld flange clamping or high-pressure threaded connection structure is used.

  • High pressure structure design, up to 40MPa.
  • Advanced micro-power high-tech, low power consumption.
  • new sensors, low initial flow and low pressure loss.
  • High accuracy with good overlap
  • multiple output modes for easy system integration.

Main applications.
Chemical high-pressure pipeline, hydraulic oil, circulating oil, oil stations, construction machinery and other high-pressure occasion liquid.

The main disadvantage of high pressure turbine flow meters is that they are not suitable for applications where the fluid contains solids or particles, as these can damage the meter.

Extended reading: How To Install The Pressure Sensor When Measuring The Flow Pipeline?

High-pressure electromagnetic flowmeter is used to measure the flow of conductive fluids in mining energy, steel, petroleum, chemical, electric power, industry, water conservancy, and other sectors. Can also measure acid, alkali, salt and other corrosive conductive liquids.

  • Measurement medium: water, acid, alkali, seawater and other strong corrosion or impurities containing conductive liquids.
  • Medium conductivity: ≥ 20uS/cm;
  • Nominal diameter: DN6-DN3000mm;
  • Lining material: polychloroprene, polytetrafluoroethylene, silicone fluorine rubber, polyurethane rubber, F46, PFA;
  • Electrode material: key-containing stainless steel, Hastelloy B, Hastelloy C, titanium, aluminum, platinum-y alloy, tungsten carbide.
  • Nominal pressure: 0.6MPa-42MPa;
  • Precision grade: 0.2, 0.5, 1.0 grade.
  • Flow rate range: 0.1m/s-15m/s;
  • Ambient temperature: sensor -25℃~+60℃; converter -10℃~+60℃.
  • Relative temperature: 5%-95%

Key Advantages:

Accurate and repeatable measurements;

No moving parts means low maintenance costs;

Can handle high pressures and high temperatures;

Key Disadvantages:

Requires a minimum conductivity of the fluid being measured;

Susceptible to interference from external magnetic fields;

Extended reading: Pressure Sensor Applications In Various Industries

The gear flow meter is a type of volumetric flow meter.
It is made of stainless steel and can be customized with 40MPa high pressure.
The high pressure gear flow meter is especially suitable for low flow measurement.

Features:

  • High pressure resistance (1.0-40MPa)
  • High and low temperature resistance (-196℃-200℃)
  • Can measure various viscous media
  • High precision and high repeatability
  • Pulse output/analog output optional
  • Wide range ratio (1:100)
  • Wide measuring range
  • High corrosion and stain resistance (acid and alkali)

Applications:

  • Resin, glue measurement
  • Ink, asphalt measurement
  • Fuel oil measurement
  • Hydraulic oil, lubricating oil, grease measurement
  • Liquid nitrogen, freezing liquid, solvent measurement
  • Edible oil, fish oil and food filling measurement
  • Chemical and anti-corrosion requirement fluid measurement
  • Fluid dosing control system

Extended Reading: Rotameter vs Flow meter

A high pressure orifice plate flowmeter is a device used to measure the flow of fluids through a pipe. It consists of a plate with an opening in the middle, through which the fluid flows. The plate is placed in the path of the fluid stream and the pressure drop across the plate is measured. This pressure drop is then used to calculate the flow rate. High pressure orifice plates are used in applications where the fluid being measured is under high pressure, such as in steam, oil and gas pipelines.

  • Applicable measured media is very wide, can be used for almost all gases, steam and liquid flow measurement.
  • Use pressure up to 32MPa, also can be used for negative pressure.
  • Medium temperature range: -30°C to +650°C.

Extended Reading: Fluid pressure sensor

Bar type flowmeter will be inserted into the center of the pipe probe, the total pressure hole on the direction of the incoming fluid flow. Static pressure hole to the direction of the fluid to flow. The difference between the total pressure and static pressure is the measured differential pressure in the center of the pipe. Then the standard differential pressure at that point is fitted by the wind tunnel calibration curve of the probe.

It is mainly used in high temperature and high pressure high flow rate or ultra-high temperature and ultra-high pressure steam flow meter. It is made of high temperature resistant and impulse corrosion resistant 1Cr18Ni9Ti material.

The complete metal chamber structure is adopted to ensure the strength and steel. So that no damage to the mechanism will occur under the washout of high-speed airflow.

Matching temperature and pressure sensors are used to compensate for the temperature and pressure of the measured medium to ensure measurement accuracy.

  • High temperature and pressure resistance: the primary element intelligent probe material selection 1Cr18Ni9Ti stainless steel ( according to different media selection of special steel ).
  • Can withstand the maximum temperature of 650 ℃, the highest medium pressure 32MPa.

Mass flow meters are based on the Coriolis principle. The flow tube through which the medium flows vibrates, thus triggering the Coriolis effect. The sensor detects and analyzes the change in frequency, phase difference and amplitude of the flow tube. The mass flow rate and density of the fluid are calculated.

The high pressure coriolis mass flow meter is pressure resistant to 24 MPa. The type of process connection as well as the ambient and process medium temperature may reduce this rating.

Choose The Right Digital Flow Meters Types

Read more about: Condensate Flow Meter-Steam Condensate Flow Meter|Types & Selection Guide

Featured High Pressure Flow Meters for Sale

High pressure flow meters Applications

High pressure flow meters are recommended based on the application. High pressure gas, High pressure water, High pressure liquid, High pressure steam or High pressure air. High pressure oxygen is also a common application. Read more Turbine Flow Meter Application Case: Demineralized Water.

Some common applications for high pressure flow meters include:

  • – High pressure gas flow measurement
  • – High pressure water flow measurement
  • – High pressure hydraulic flow measurement
  • – High pressure steam flow measurement
  • – High pressure air flow measurement
  • – High pressure oxygen flow measurement

Read more about: High Pressure Hydraulic Flow Meter

When selecting a high pressure flow meter, it is important to consider the nature of the fluid being measured, the operating conditions and the required degree of accuracy. Each type of high pressure flow meter has its own advantages and disadvantages that should be considered in order to select the best meter for the application.

Read More about: What is the difference between rotameter and flowmeter?

More Related Flow Measurement Solutions

Extended Reading: Special Magnetic Flowmeter Installation situation

Sino-Inst is a manufacturer of High Pressure Flow Meters for Liquids-Steam-Gas. We offer more than 20 types of High Pressure Flow Meters, 40% for gas, 30% for liquid and the rest for steam. High Pressure Flow Meters include turbine, coriolis mass, and more DP flow meters.

High Pressure Flow Meter 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 Flow Meters 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 Flow Meters, 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 High Pressure Flow Meter, level sensors, or other equipment, please give us a call.

Request a Quote

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Flow Pressure Transducers for Fluid Pipelines

Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be liquid or gas.
Measure the pressure of the fluid, on the one hand, you can understand the pressure in the pipeline. On the other hand, pipeline flow can be monitored through the relationship between pipe diameter-pressure-flow.

Featured Flow Pressure Transducers for Sale

Extended reading: Static Pressure vs Dynamic Pressur

Measuring Flow with Pressure Sensors

Differential pressure sensors have been widely used to measure the flow of incompressible liquids. A very common method is to measure the pressure drop across the orifice in the pipe and calculate the flow.

An orifice plate is simply a plate that fits in a pipe (usually between flanges) with a hole of known size in its center. As the fluid flows through the orifice, a pressure drop develops across the orifice plate from the upstream side to the downstream side. This pressure drop is proportional to flow, and the sensor signal can be used to calculate flow in engineering units.

The upstream side of the orifice will have higher pressure and will be connected to the + port of the pressure sensor through a three-valve manifold. The downstream side of the orifice is similarly connected to the -port of the pressure sensor. The three-valve manifold is used to protect the pressure sensor from overpressure when the pressure sensor is installed into the work pipeline.

Calculations to determine flow from pressure drop are derived from fairly simple physical equations. However, there are many variables, each with its own engineering unit. These include: hole geometry, pipe size, fluid viscosity and fluid density. Given the number of terms and the conversion factors involved in each variable, the calculation can be quite involved.

Fortunately, there are many online calculators that allow you to simply enter variables in any engineering units that are convenient for you, and then calculate the flow rate for any given pressure drop across the orifice.

Learn more about Flow Rate And Pressure Formula, which may help you calculate mass or volume flow.

Extended reading: Temperature and pressure compensation of vortex steam flowmeter

Pipe diameter/velocity/flow comparison table (inlet > outlet)

Diameter (DN) Flow m3/h
0.4m/s 0.6m/s 0.8m/s 1.0m/s 1.2m/s 1.4m/s 1.6m/s 1.8m/s 2.0m/s 2.2m/s 2.4m/s 2.6m/s 2.8m/s 3.0m/s
20 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.0 2.3 2.5 2.7 2.9 3.2 3.4
25 0.7 1.1 1.4 1.8 2.1 2.5 2.8 3.2 3.5 3.9 4.2 4.6 4.9 5.3
32 1.2 1.7 2.3 2.9 3.5 4.1 4.6 5.2 5.8 6.4 6.9 7.5 8.1 8.7
40 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 10.0 10.9 11.8 12.7 13.6
50 2.8 4.2 5.7 7.1 8.5 9.9 11.3 12.7 14.1 15.6 17.0 18.4 19.8 21.2
65 4.8 7.2 9.6 11.9 14.3 16.7 19.1 21.5 23.9 26.3 28.7 31.1 33.4 35.8
80 7.2 10.9 14.5 18.1 21.7 25.3 29.0 32.6 36.2 39.8 43.4 47.0 50.7 54.3
100 11.3 17.0 22.6 28.3 33.9 39.6 45.2 50.9 56.5 62.2 67.9 73.5 79.2 84.8
125 17.7 26.5 35.3 44.2 53.0 61.9 70.7 79.5 88.4 97.2 106.0 114.9 123.7 132.5
150 25.4 38.2 50.9 63.6 76.3 89.1 101.8 114.5 127.2 140.0 152.7 165.4 178.1 190.9
200 45.2 67.9 90.5 113.1 135.7 158.3 181.0 203.6 226.2 248.8 271.4 294.1 316.7 339.3
250 70.7 106.0 141.4 176.7 212.1 247.4 282.7 318.1 353.4 388.8 424.1 459.5 494.8 530.1
300 101.8 152.7 203.6 254.5 305.4 356.3 407.1 458.0 508.9 559.8 610.7 661.6 712.5 763.4
350 138.5 207.8 277.1 346.4 415.6 484.9 554.2 623.4 692.7 762.0 831.3 900.5 969.8 1039.1
400 181.0 271.4 361.9 452.4 542.9 633.3 723.8 814.3 904.8 995.3 1085.7 1176.2 1266.7 1357.2
450 229.0 343.5 458.0 572.6 687.1 801.6 916.1 1030.6 1145.1 1259.6 1374.1 1488.6 1603.2 1717.7
500 282.7 424.1 565.5 706.9 848.2 989.6 1131.0 1272.3 1413.7 1555.1 1696.5 1837.8 1979.2 2120.6
600 407.1 610.7 814.3 1017.9 1221.4 1425.0 1628.6 1832.2 2035.7 2239.3 2442.9 2646.5 2850.0 3053.6

Extended Reading: MEMS Pressure Sensors

Diameter(DN) Recommended flow rate m/s:
20 25 32 40 50 65 80 100 125 150 200 250 300 350 400
closed system 0.5-0.6 0.6-0.7 0.7-0.9 0.8-1 0.9-1.2 1.1-1.4 1.2-1.6 1.3-1.8 1.5-2.0 1.6-2.2 1.8-2.5 1.8-2.6 1.9-2.9 1.6-2.5 1.8-2.6
open system 0.4-0.5 0.5-0.6 0.6-0.8 0.7-0.9 0.8-1.0 0.9-1.2 1.1-1.4 1.2-1.6 1.4-1.8 1.5-2.0 1.6-2.3 1.7-2.4 1.7-2.4 1.6-2.1 1.8-2.3

Extended reading: Differential pressure flow meter advantages and disadvantages

Applications of Flow Pressure Transducers

Fluid Pressure Transducers are mainly used in: construction machinery, hydraulic and pneumatic systems, petrochemicals, energy and water treatment, water conservancy and hydropower, compressors and other fields:

  1. Applied to hydraulic system
  2. Applied to safety control system
  3. Applied to injection mold
  4. Applied to monitoring mine pressure
  5. used in compressors, air conditioning and refrigeration equipment

Extended reading: High Pressure Flow Meters Types

How to install the pressure sensor when measuring the flow pipeline?

When detecting the gas and fluid pressure in the pipeline, the pressure guiding pipe is connected with a vertical tee before entering the pressure sensor. The sampling gas enters from the upper part of the tee. The lower part of the tee is connected to a water collecting irrigation, and the horizontal interface of the tee enters the pressure sensor .

The pressure sensor is installed horizontally. The sampling pressure pipe is connected to the upper part of the pressure sensor detection diaphragm. The lower part of the detection diaphragm has its own discharge bolt.

When there is liquid entering the pressure guiding pipe, a large part will be collected in the water collecting irrigation. A small amount of liquid entering the pressure sensor detection diaphragm can be discharged by the discharge bolt of the pressure sensor.

When measuring fluid pressure, the pressure of the main fluid is taken as the measurement object. Therefore, when the pressure sensor measures the gas pressure in the pipeline, in order to prevent the liquid in it from entering the sampling pressure pipe. The sampling point is 45° above the horizontal plane of the center of the pipeline.

When measuring the liquid pressure of the pipeline, in order to prevent the gas in it from entering the sampling pressure guiding tube, the sampling point is 45° below the horizontal plane of the center of the pipeline. Read more about: Shop 101: Key Factors In Selecting A Pipe Flow Meter

Even so, it is inevitable that different phases of fluid will enter the sampling impulse pipe. There are different requirements for the installation and configuration of the pressure sensor impulse pipe.

The water collecting tank or gas collecting tank installed on the pressure guiding pipe is equipped with an inlet valve and a discharge valve. During normal testing, the inlet valve is opened and the discharge valve is closed. When it is necessary to discharge, first close the inlet valve, and then open the discharge valve. . This discharge method will always have a bit of out-of-phase fluid remaining in the water or gas header, but it will not affect the pressure sensor detection accuracy.

Fluids include both gaseous fluids and liquid fluids. The density and pressure of gaseous fluids are lower than that of liquid fluids. So in pipeline fluids, the gaseous fluid is always above the liquid fluid. This is the basic characteristic of vapor-liquid two-phase fluid.

Extended reading: Pipe Diameter vs Pressure vs Flow

Frequently
Asked
Questions

Pressure transmitters can be categorized into four main types:

  • Gauge Pressure Transmitter.
  • Absolute Transmitters.
  • Differential-Pressure Transmitter.
  • Multivariable Pressure Transmitters.

Extended Reading: 4 wire pressure sensor wiring diagram

There are many types of pressure sensors. Such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, etc.

Extended reading: wireless pressure transmitter working principle

Currently, the most widely used pressure sensors include:

  • Diffused silicon piezoresistive pressure sensor,
  • Ceramic piezoresistive pressure sensor,
  • Sputtering thin film pressure sensor,
  • Capacitive pressure sensor,
  • Sapphire pressure sensor with high temperature resistance.
  • But the most widely used is the piezoresistive pressure sensor, which has a very low price, high accuracy and good linearity.

Extended Reading: Electronic Pressure Switch for Air Compressor

Flow is an important parameter in industrial production and life. The amount of fluid flowing through a section of a pipe per unit time is called instantaneous flow. Instantaneous flow is divided into volume flow and mass flow. A flow sensor is a sensor that measures the flow of a fluid. Flow sensor is an important instrument in measurement technology, it is widely used in industrial process control, life science and technology, commercial application, military and other fields. In recent years, with the development of science and technology and the development of human needs, flow sensors are also constantly developing.

Extended reading: Digital Flow Meters

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Extended reading: High accuracy pressure transducers

Sino-Inst is Manufacturer of Flow Pressure Transducers for Fluid Pipelines. For High Viscosity Fluids-Chemical Coatings – Paints – Slurry – Asphalt – Crude Oil. We supply more than 20 kinds of Flow Pressure Transducers.

Flow Pressure Transducers are mainly used for highly viscous media.
It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s Flow Pressure Transducers, made in China, Having good Quality, With better price. Our pressure measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Flow Pressure Transducer, level sensor, or other device, give us a call.

Request a Quote

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Collection of Industrial Insertion Flowmeter Types

What is an insertion flow meter?

Insertion flowmeter is a type of flowmeter in which the measuring probe is inserted into the pipe to measure the flow. This is a type of flow meter divided by structure. It includes various flow meters with different working principles. Insertion flowmeter plays an important role in the measurement of large-diameter water flow. Light weight, low pressure loss, easy installation and maintenance.

There are many types of insertion flowmeters that have been popularized and used. According to the working principle of the insertion flowmeter detection head, it can be divided into insertion turbine, insertion vortex, insertion electromagnetic, uniform velocity tube and thermal flowmeter.

Featured Insertion Flowmeters for Sale

insertion flowmeter types

Insertion Magnetic Flow Meter, also called insertion electromagnetic flow meter, is an insertion type flow meter. Insertion magnetic flowmeter can be installed without stopping the flow. Suitable for large diameter DN300-3000.

  • Velocity measurement range: (0.1-10) m/s
  • Measuring pipe diameter: DN (100-3000) mm
  • Measurement accuracy: 1.5~2.5 class
  • Working pressure: <1.6MPa
  • Medium temperature: -20~150℃

Extended Reading: Special Magnetic Flowmeter Installation situation

Insertion Vortex Flow Meter is mainly used for flow measurement of gas, liquid, and steam fluid in large-diameter pipelines.

  1. It can measure the volume flow and mass flow of steam, gas and liquid;
  2. No mechanical moving parts, high measurement accuracy, compact structure and easy maintenance;
  3. Small pressure loss, wide range; range up to 1:25;
  4. Adopt interference elimination circuit and anti-vibration sensor head;
  5. The use of disturbance elimination circuit and anti-vibration sensor head makes the instrument have certain anti-vibration performance;
  6. The temperature of the measurable medium can reach +250℃.
  7. The sensor can be disassembled and installed continuously, and the amplifier and the sensor can be separated (separation distance 15m);

The insertion target flowmeter is developed on the basis of the traditional target flowmeter.
It has the characteristics of flowmeter without moving parts such as orifice plate and vortex street. At the same time, it has high sensitivity, accuracy comparable to that of positive displacement flowmeters, and a wide range.

  • Wide range of applicable pipe diameters: Φ10~Φ2000 to larger;
  • Wide temperature range: -196°C ~ 500°C;
  • Applicable to high/low pressure conditions: 0~42MPa;
  • Applicable to various media: gas, liquid (including high viscosity liquid, slurry), steam;
  • It is suitable for medium with low flow velocity, and its measurable minimum flow velocity is 0.08m/s.

The SI-VL Verabar Flow Meter is designed with an aerodynamic engineering structure and is a sensor element. The VERIS Verabar Flow Meter is a Insertion flow meter. A Verabar tube sensor is inserted into the pipe. When the fluid flows through the sensor, a high-pressure distribution zone is created in the forward direction of the flow. And a low-pressure distribution zone is created in the rear. Verabar Flow Meter can be used to measure dry gas, humid gas, liquid or vapor, without being limited by dielectric constant.

The insertion turbine sensor is matched with the display instrument to form an insertion turbine flowmeter. The insertion turbine flowmeter can be widely used in large-diameter pipeline source water, circulating water, purified water, etc. to measure the volume instantaneous flow and total volume of liquids.

Insertion turbine flowmeter features:

  1. The insertion turbine flowmeter has strong resistance to impurities. The tangential impeller can release the suspended debris in the fluid at any time when it rotates. so that it does not wrap around the blades of the tangential impeller;
  2. The structure and principle of the sensor and display instrument are very simple and intuitive, and it is very easy for users to master their use and maintenance technology;
  3. It has high anti-electromagnetic interference and anti-vibration capabilities, small pressure loss, wide flow range, and low lower limit flow rate. The impeller has anti-corrosion function;
  4. The sensor can be installed in the open air, and the entire sensor can be used in water for a long time. Horizontal, vertical and inclined pipes can be used;
  5. Sensor with shut-off valve. There is no need to cut off the current during installation and disassembly;

The Ultrasonic Insertion Flow Meter consists of a converter and a pair of insert sensors. The Insertion sensor consists of a positioning base, a ball valve, and a sensor core. Principle: When ultrasonic waves pass through the liquid, the liquid has a slight influence on the insertion time. The change of the insertion time is proportional to the liquid flow rate.

Annubar Flow Meter is a no-equal solution with a patented, averaging pitot tube that delivers superior measurement accuracy over a wide flow range. This flow meter can measure multiple variables and is engineered with an integrated thermowell for temperature measurement. Its patented T-shaped sensor is capable of obtaining measurements via a single pipe penetration while maintaining a small profile in the pipe to reduce permanent pressure loss and increase energy savings.

Insertion Thermal Mass Flow Meter can simultaneously display flow rate (flow), temperature. Low flow rates are responsive, and high flow rates can achieve good accuracy. Even at high temperature, a good constant temperature difference can be obtained, and the stability is good. There are a variety of installation options to choose from, with a measuring range up to 180Nm/s.

Measured medium: air, natural gas, biogas, coal gas, dry chlorine, oxygen, carbon monoxide combustion air, flue gas, flare gas, hydrogen, argon and other dry gases.

insertion flow meter wastewater

If an insertion flowmeter is to be selected for a wastewater pipeline, an insertion electromagnetic flowmeter must be the first choice.​​

The Insertion wastewater flowmeter can be widely used to measure the flow of conductive fluids in tap water, steel, petroleum, chemical industry, electric power, industry, water conservancy, water administration and water resources. It can also measure corrosive conductive liquids such as acids, alkalis, and salts.

The Insertion sewage flowmeter is mainly composed of a measuring head (or measuring tube), an excitation system, an insertion rod, a junction box, a mounting base, and a sealing and positioning mechanism.

Measuring head (or measuring tube): The measuring head (measuring tube) is located at the particle point of the measured flow velocity in the pipeline, and is used to detect the flow velocity at this point. A measuring head (or measuring tube) is a tip or conduit made of insulating material on which a pair of electrodes is mounted. Except for the electrode tip or the inner wall of the measuring tube, other parts are insulated from the fluid to be measured.

Excitation system: The function of the excitation system is to generate a working magnetic field. It consists of an excitation coil and an iron core. It is insulating sealed into the insertion rod.

Insert rod: Made of stainless steel material. The measuring head and the measuring tube are fixed in the insertion rod. The excitation lead and electrode lead are sealed with the measured medium and connected to the junction box through the insertion rod. A direction indicator is welded on the insertion rod to ensure that the working magnetic field, the flow rate and the electrode connection are perpendicular to each other during installation, which meets the requirements of Faraday’s law of electromagnetic induction.

Junction Box: The junction box is located on the top of the sensor. The terminals in the junction box connect the sensor and the converter to each other.

Mounting base: The mounting base is welded on the pipeline under test, used to connect with the mounting ball valve and insert the part of the sewage flowmeter sensor.

Sealing mechanism: It consists of a compression thread seat made of stainless steel, a compression nut, a rubber washer and a positioning screw. It is used to seal and insert the sewage sensor, so that it can avoid a certain working pressure.

insertion flow meter for air/compressed air

If you choose an insertion flowmeter for an air line, or a compressed air line. Then the insertion thermal mass flow meter can be said to be the first choice.

Because, the insertion thermal mass flow meter has obvious advantages:

  • Wide range ratio 1000:1; large diameter, low flow rate, negligible pressure loss;
  • Direct measurement of mass flow without temperature and pressure compensation;
  • Very sensitive measurement of low flow rates;
  • Easy to design and select, easy to install and use;
  • Suitable for all kinds of single or mixed gas flow measurement.

If you need to measure high temperature air, or high temperature compressed air. Then another type of flow meter may need to be selected. Such as high temperature Annubar flowmeter.

Frequently
Asked
Questions

The installation requirements of various insertion flowmeters vary. Here is a brief introduction to the standard installation of plug-in electromagnetic flowmeters:

  1. The arrangement of instruments on the pipeline should be far away from the valve. Maintain a 10-diameter upstream intermediate pipe section and a 5-diameter downstream straight pipe section.
  2. The on-site power supply needs to match the instrument power supply, generally a 24V rectifier. If there is no external power supply for the field measurement, an external power supply meter will be connected.
  3. Pay attention to the flow direction of the measured liquid on the inner wall of the pipe. If the installation is reversed, the measured liquid will show a negative value.
  4. The installation site should be cool and rain-proof. If it is often rained or immersed in water, the protection grade IP68 product should be selected.
  5. The fluid flow in the pipeline should not be stopped if the process requires it. Media should not spill. A ball valve needs to be installed.

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.

Extended reading: Ultrasonic Flow Meters Types & Technical Guide

For different working principle, We offer different types of flow meters, like:

  • Differential Pressure Flow Meters
  • Orifice Plate
  • Venturi Tube
  • Flow Nozzles
  • The Sonic Nozzle – Critical (Choked) Flow Nozzle
  • Calorimetric Flowmeter
  • Ultrasonic Doppler Flowmeter
  • Positive Displacement Flowmeter
  • Variable Area Flowmeter or Rotameter
  • Velocity Flowmeters
  • Pitot Tubes
  • Electromagnetic Flowmeter
  • Turbine Flowmeter
  • Vortex Flow Meter
  • Thermal Flowmeter
  • Coriolis Flowmeter
  • Mass Flowmeters
  • Open Channel Flowmeters

Sino-Inst is Manufacturer of Insertion Flowmeters. We supply more than 20 kinds of Insertion Flow Meters. 40% insertion magnetic flowmeters, 30% insertion vortex flow meter and other types of flowmeters.

Insertion Flowmeters are mainly used for flow measurement of various liquids and gas.
It can measure even liquids such as water, seawater, oil, and slurry.

Insertion Flowmeters enable stable flow measurement without piping modifications. This greatly meets the measurement needs of many applications. Can be used from small to large tubes.

Sino-Inst’sInsertion Flowmeters, 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.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s an Insertion Flowmeter, level sensor, or other device, give us a call.

Request a Quote

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