Featured Mass Flow Meters

Working Principle of Micro Motion Flow Transmitter

The micro motion flow transmitter works by measuring the flow rate of liquids and gases using the Coriolis Effect. This means that when a fluid flows through a tube, it causes the tube to vibrate in a specific way. The sensor inside the micro motion flow transmitter detects these vibrations and calculates the mass flow rate of the fluid.

Imagine a tube filled with water. As the water flows through the tube, it causes the tube to twist and turn, similar to a twisting rope. The sensor within the micro motion flow transmitter detects these twists and turns and uses them to measure the amount of water flowing through the tube. This allows the transmitter to accurately measure the mass flow rate of the fluid. Making it an important tool for industries that rely on accurate flow measurements.

In simpler terms, the micro motion flow transmitter works like a detective. It senses the movements of the fluid flowing through the tube and uses them to determine how much of the fluid is flowing. This makes it an essential device for ensuring precise and accurate flow measurements in a variety of industries.

Types of Micro Motion Flow Transmitter

There are a few different types of micro motion flow transmitter available, each with its own unique features and benefits. These include:

• Fork vibrating flow meters: These have a sensor that vibrates like a tuning fork to detect the movement of the fluid.
• Straight tube flow meters: These have a straight tube that the fluid flows through, which makes them ideal for applications where the fluid is very viscous.
• Dual tube flow meters: These have two tubes that vibrate in opposite directions, which makes them very accurate and precise.

Each type of flow meter has its own strengths and weaknesses, so it’s important to choose the right one for your needs.

For example, a straight tube flow meter might be best if you’re measuring the flow of a thick liquid. While a dual tube flow meter might be best if you need extremely precise measurements.

By understanding the different types of micro motion flow transmitter available, you can choose the one that’s right for your specific application.

Applications

The micro motion flow transmitter is a versatile tool that can be used in many different industries and applications. Here are just a few examples:

Industry	Application
Chemical processing	Measuring the flow of chemicals through pipelines, ensuring precise mixing and accurate dosing
Oil and gas	Measuring the flow of oil and gas through pipelines, making it easier to manage the extraction and transportation of these valuable resources
Food and beverage	Measuring the flow of ingredients in food and beverage production, ensuring consistent quality and reducing waste
Pharmaceutical	Accurately measuring the flow of liquids and gases in pharmaceutical production, making it easier to ensure the purity and consistency of the end products
Water and wastewater treatment	Measuring the flow of water and wastewater, making it easier to manage the treatment and disposal of these vital resources

Comparison of Micro Motion Flow Transmitter with Other Flow Meters

Micro motion flow transmitters offer highly accurate and precise flow measurement, durability in harsh conditions, and versatility for use in different industries.

While other types of flow meters may be less expensive or suitable for certain applications, micro motion flow transmitters remain a valuable tool for industries that require precise flow measurement.

Here are some of the main differences between micro motion flow transmitters and other flow meters:

• Differential pressure flow meters: These meters measure the pressure drop across an obstruction in the pipe to determine flow rate. They are less accurate than micro motion flow transmitters and can be affected by changes in viscosity and fluid density.
• Positive displacement flow meters: These meters measure the amount of fluid that is displaced by a moving part, such as a piston or gear. They are accurate but can be affected by changes in fluid viscosity and require regular maintenance.
• Turbine flow meters: These meters use a spinning turbine to measure flow rate. They are less accurate than micro motion flow transmitters and can be affected by changes in fluid density and viscosity.
• Ultrasonic flow meters: These meters use sound waves to measure flow rate. They can be more accurate than micro motion flow transmitters in some applications but are less suitable for very high or very low flow rates.

More Micro Motion Flow Transmitter Market and applications

In conclusion, micro motion flow transmitters are a valuable tool for measuring the flow rate of liquids and gases in various industries. They offer highly accurate and precise flow measurement, durability in harsh conditions, and versatility for use in different applications.

While there are some limitations to be aware of, understanding the factors to consider when choosing a micro motion flow transmitter can help you select the right device for your needs.

If you’re looking for a reliable supplier of flow measurement devices, consider Sino-Inst.

With many years of industry experience, Sino-Inst offers a wide range of flow meters, including micro motion flow transmitters, and can help you find the right device for your specific application.

Contact Sino-Inst today to learn more about their flow measurement solutions and how they can help you improve efficiency and reduce waste in your industry.

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What is a Flow Meter?

A flow meter is a device that measures the amount of liquid, steam or gas that passes through a specific point in a pipe or conduit. It is used in various industries to monitor and control the flow of fluids in pipelines, such as water, oil , gas, or chemicals.

Flow meters can be mechanical, electronic, or ultrasonic, and they work by measuring the velocity, volume, or mass of the fluid.

Flow meters are essential for ensuring that fluid flow rates remain within acceptable limits. And they help prevent damage to equipment and systems due to overloading or underloading. They are also critical in maintaining product quality and process efficiency.

Types of Flowmeters

There are various types of flowmeters used to measure fluid flow, including mechanical, electronic, and ultrasonic. Each type measures the flow rate of a fluid in a different way. Each type of flowmeter has its advantages and disadvantages.

We’ll take a look at the 5 main types of flowmeters that can be found on the market today. Includes differential pressure flowmeters, velocity flowmeters, positive displacement flowmeters, mass flowmeters and open channel flowmeters. More types of flowmeters from Wikipedia.

Differential Pressure (DP) Flowmeters

Differential Pressure (DP) Flowmeters measure fluid flow by detecting the pressure drop across an throttle placed in the flow path, such as an orifice plate, venturi tube, or flow nozzle. The greater the flow rate, the higher the pressure drop, and the flow rate can be calculated based on the pressure difference. DP Flowmeters are widely used due to their simplicity and low cost, and they can be used to measure both liquids and gases.

There are several types of DP Flowmeters, each with its unique design and advantages. Here are some of the most common types:

• Orifice Plate Flowmeters: They have a circular plate with a hole in the middle that creates a pressure drop as the fluid flows through it.
• Venturi Flowmeters: They have a conical shape that narrows down the flow path, which causes an increase in fluid velocity and a decrease in pressure.
• Flow Nozzle Flowmeters: They have a converging inlet section, a throat section, and a diverging outlet section that create a pressure drop across the nozzle.
• Pitot Tubes: They measure the fluid velocity by detecting the pressure difference between the stagnation point and the point where the fluid flow is parallel to the tube’s axis.

Each type of DP Flowmeter has its advantages and disadvantages, and the best choice depends on the specific application requirements.

Read more about: Differential Pressure Flow Meter Calculation Formula and Calculation Examples; How to Calculate Pressure Drop in a Pipe?

Positive Displacement (PD) Flowmeters

Positive Displacement (PD) Flowmeters measure fluid flow by trapping and measuring the amount of fluid that moves through the meter. The principle of operation is based on the movement of the fluid through a chamber of fixed volume, causing a displacement of the fluid. The flow rate is calculated based on the number of times the chamber is filled and emptied. PD Flowmeters are highly accurate and suitable for measuring low flow rates of both viscous and non-viscous liquids.

There are several types of PD Flowmeters, each with its unique design and advantages. Here are some of the most common types, along with their advantages and disadvantages:

Type of PD Flowmeter	Principle of Operation	Advantages	Disadvantages
Piston Flowmeters	Use a piston moving inside a chamber to measure fluid flow.	Highly accurate; Suitable for low to high viscosity fluids	Not suitable for measuring fluids with suspended solids
Oval Gear Flowmeters	Two oval gears rotating in opposite directions	Highly accurate; Suitable for low to medium viscosity fluids	Affected by fluid temperature and viscosity changes
Nutating Disc Flowmeters	A disc that “nutates” or wobbles to trap and measure fluid flow	Highly accurate; Suitable for low viscosity fluids	Affected by fluid temperature changes
Rotary Vane Flowmeters	A rotor with vanes that rotate inside a chamber	Highly accurate; Suitable for low to high viscosity fluids	Not suitable for measuring fluids with suspended solids

More details about: PD Flow Meters Selection and Application | Oil-Liquid

Velocity Flowmeters

Velocity Flowmeters measure fluid flow by determining the velocity of the fluid as it flows through the meter. The principle of operation is based on the relationship between the velocity of the fluid and the pressure difference created by the fluid’s motion. Velocity Flowmeters are commonly used for measuring high flow rates of fluids such as water, steam, and gases, and they are often less expensive than other types of flowmeters.

Here are some of the most common types of Velocity Flowmeters along with their advantages and disadvantages:

Type of Velocity Flowmeter	Principle of Operation	Advantages	Disadvantages
Turbine Flowmeters	Turbine rotor spins as fluid flows through it	Highly accurate; Suitable for clean fluids with low to medium viscosity	Affected by changes in fluid density, temperature, and viscosity
Electromagnetic Flowmeters	Faraday’s Law to measure voltage generated by fluid flow through a magnetic field	Highly accurate; Suitable for measuring conductive fluids such as water and acids	Not suitable for measuring non-conductive fluids
Vortex Flowmeters	Measure fluid flow using the principle of the Karman vortex street	Highly accurate; Suitable for clean fluids with low to medium viscosity	Can be affected by changes in fluid density
Ultrasonic Flowmeters	Use ultrasonic sensors to measure the time it takes for an ultrasonic signal to travel between two points in the fluid flow	Highly accurate; Suitable for measuring fluids of different viscosities, densities, and conductivities	Often more expensive than other types of flowmeters

Mass Flowmeters

Mass Flowmeters measure the mass flow rate of fluids passing through them, rather than measuring volume or velocity. They work on the principle of thermal dispersion or Coriolis effect, and they can measure the flow rate of both liquids and gases accurately. Mass Flowmeters are highly sensitive and provide accurate readings even with changes in fluid properties, making them ideal for a wide range of industrial applications.

Coriolis Meters:

Coriolis Meters measure fluid flow using the Coriolis effect. The meter consists of a vibrating tube, and as the fluid flows through the tube, it causes a change in the tube’s vibration frequency, which is measured by sensors.

The advantages of Coriolis meters include high accuracy and stability, excellent repeatability, and the ability to measure a wide range of fluids, including liquids and gases.

However, they can be costly, and their performance can be affected by the presence of solid particles or gas bubbles.

Thermal Mass Flow Meters:

Thermal Mass Flow Meters measure the mass flow rate of fluids by detecting the heat transfer from a heated element to the fluid. As the fluid flows over the heated element, it cools it down, and the change in temperature is measured by temperature sensors.

The advantages of Thermal Mass Flow Meters include high accuracy, the ability to measure both liquids and gases, and their simplicity of design.

However, they can be affected by changes in fluid temperature and viscosity, and they may require recalibration if the fluid properties change.

Open Channel Flowmeters

Open Channel Flowmeters are used to measure the flow rate of liquids in open channels, such as rivers, streams, and irrigation canals. They work by using a primary device, such as a flume or weir, to create a constriction in the channel, which causes the liquid to rise and flow through the device. The flow rate is then determined by measuring the height of the liquid above the device and using a formula to calculate the flow rate.

Type of Flowmeter	Principle of Operation	Advantages	Disadvantages
Flumes	Specially designed constriction	High accuracy, low cost, ease of installation	Affected by changes in channel shape, require certain amount of head loss
Weirs	Sharp-crested structure	High accuracy, low cost, ease of installation	Affected by changes in channel shape, require certain amount of head loss
Area-Velocity Meters	Measure velocity at multiple points and combine with cross-sectional area	High accuracy, measure flow rates in irregular channels, measure both forward and reverse flow	More complex and costly than other open channel flow meters
Ultrasonic Doppler Meters	Use sound waves to measure velocity	High accuracy, measure flow rates in irregular channels, measure both forward and reverse flow	Affected by changes in liquid’s acoustic properties, may require calib

How to select a flow meter?

Here are some of the key parameters that can affect the selection of a flowmeter for a particular application:

1. Fluid type and properties, such as viscosity, density, and corrosiveness
2. Flow rate range and required accuracy
3. Operating conditions, such as temperature, pressure, and fluid velocity
4. Installation requirements, such as the orientation and size of the pipe
5. Availability of power or signal inputs for the flowmeter
6. Environmental conditions, such as the presence of hazardous or explosive materials
7. Required maintenance and calibration intervals
8. Compatibility with existing control systems or instrumentation
9. Cost and budget considerations.

Here are some recommendations for selecting flowmeters for specific fluid applications:

It’s important to note that the selection of a flowmeter should be based on the specific needs of the application, and factors such as accuracy, repeatability, cost, and installation requirements should be considered when making a selection.

More Flow Measurement Technologies and Applications

In conclusion, the proper selection and use of Types of Flowmeters are crucial for accurate and reliable measurement of fluid flow in various industrial processes. Each types of flowmeter has its own advantages and limitations, which should be carefully considered before making a decision. However, Sino-Inst, as a leading manufacturer of flowmeters, has various advantages that make it an ideal choice for customers in need of high-quality flow measurement solutions.

With years of experience and expertise, Sino-Inst offers a wide range of flowmeters, including differential pressure, positive displacement, velocity, mass, and open-channel flowmeters, to meet different application needs. Additionally, Sino-Inst provides customized solutions, comprehensive technical support, and excellent after-sales services to ensure customer satisfaction.

Whether you need a flowmeter for liquid, gas, or steam applications, Sino-Inst has the right solution for you. We are committed to providing the best products and services to help our customers improve their processes and achieve their goals. Contact us today to learn more about our flowmeters and how we can help you.

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Definition of turndown ratio

So, what exactly is turndown ratio?

Well, it’s the measurement range of a flow meter from the highest to the lowest flow rate it can accurately measure. Essentially, it tells you how much the flow rate can be turned down or decreased while still maintaining accurate readings.

For example, a flow meter with a turndown ratio of 10:1 can accurately measure flow rates from 100 L/H down to 10 L/H.

This ratio is an important consideration when selecting a flow meter for your application, as it determines the meter’s versatility and ability to handle varying flow rates.

A higher turndown ratio means more flexibility and potentially cost savings, as you may not need multiple flow meters for different flow rates.

Why is Turndown Ratio important?

In flow measurement, the turndown ratio indicates the range of flow over which the flowmeter can measure with acceptable accuracy. It is also known as adjustable range. This is very important when selecting a flow meter technology for a specific application.

If the airflow to be measured is expected to vary between 100,000 cubic meters per day and 1,000,000 cubic meters per day. The turndown ratio for a specific application is then at least 10:1. Therefore, the meter requires at least a 10:1 turndown ratio.

Formula for calculating Turndown Ratio

The turndown ratio can be expressed as:
TR = Q(max)/Q(min)

TR = Regulation Ratio
Q(max) = maximum flow
Q (min) = minimum flow

Example calculation

If the gas to be measured varies between 100000 m3/day and 1000000 m3/day.
This particular application has TR = 10:1.
The TR of the required flow meter should be at least 10:1
If the flow meter has a maximum flow rate of 2000000 m3/day, then the required turndown ratio (TR) will be 20:1

Typical turndown ratios for various flowmeters

The examples here are for gas flow, but the same gauge type can be used for liquids, with similar turndown ratios.

Different types of flow meters have varying turnover ratios. Here are some common flow meters and their typical turnover ratios:

• Differential Pressure Flow Meters: 10:1 to 100:1
• Turbine Flow Meters: 10:1
• Magnetic Flow Meters: 20:1 to 100:1
• Coriolis Flow Meters: 10:1 to 100:1
• Ultrasonic Flow Meters: 100:1 to 1000:1
• Vortex Flow Meters: 10:1 to 100:1
• The turndown ratio of the thermal mass flow meter is 1000:1.
• The actual adjustment ratio of the orifice meter is 3:1.

It’s important to note that these are general ranges and actual turnover ratios may vary depending on the specific model, size, and operating conditions. When selecting a flow meter, it’s crucial to consider the turnover ratio and ensure that it can accurately measure the flow rate needed for your application.

Choosing the right flow meter for your application

Selecting the right flow meter for your application is crucial to ensure accurate and precise measurements. Here are some key considerations when choosing a flow meter:

To maximize the turndown ratio of your flow meter, follow these best practices:

Proper installation: Ensure that the flow meter is installed correctly according to manufacturer specifications.

Regular calibration: Regular calibration of the flow meter is essential to maintain accuracy.

Maintenance: Proper maintenance of the flow meter, such as cleaning and inspection, can prolong its lifespan and improve performance.

Avoiding extremes: Avoid operating the flow meter at the extreme ends of its turndown ratio range, as accuracy may be compromised.

By considering these factors and following these best practices, you can select and maintain a flow meter that will provide accurate and reliable measurements for your application.

More Flow Measurement Solutions

In conclusion, turndown ratio is an essential factor to consider when selecting a flow meter for your application. It determines the range of flow rates that a flow meter can accurately measure, and a high turndown ratio can increase efficiency and potentially save you money.

Remember to consider the flow rate range, fluid properties, environmental conditions, and accuracy requirements when selecting a flow meter.

By following best practices such as proper installation, regular calibration, maintenance, and avoiding extremes, you can maximize the turndown ratio of your flow meter and ensure accurate and reliable measurements.

By selecting and maintaining the right flow meter, you can improve your operations and increase productivity.

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Featured Digital Gas Mass Flow Meters For Sale

Benefits of Digital Gas Mass Flow Meters

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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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.

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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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.

For installation rules specific to magnetic flow meters — straight run, grounding, and bolt torque — see our magnetic flow meter installation guide.

The configuration of each part in the figure depends on the situation of the measured object, not necessarily all of them.

Turbine flowmeters are sensitive to distortion of flow velocity distribution and swirling flow in the pipeline, and the flow into the sensor should be fully developed. Therefore, the necessary straight pipe section or flow regulator should be equipped according to the type of choke on the upstream side of the sensor, as shown in the table below.

If the condition of the upstream side choke is not clear, it is generally recommended that the length of the upstream straight pipe section is not less than 20D, and the length of the downstream straight pipe section is not less than 5D. If the installation space cannot meet the above requirements, a flow regulator can be installed between the choke and the sensor.

When the sensor is installed outdoors, measures should be taken to avoid direct sunlight and rain.

Type of spoiler on the upstream side	Single 90° elbow	Two 90° elbows on the same plane	Two 90° elbows on different planes	Concentric reducer	Fully open valve	Hhalf open valve	Downstream side length
L/DN	20	25	40	15	20	50	5

Installation Requirements for Connecting Pipelines

The sensor installed horizontally requires that the pipeline should not have a visually detectable inclination (generally within 5°). The verticality deviation of the sensor pipe installed vertically should also be less than 5°. The fluid direction must be upward when installed vertically.

Where continuous operation is required and the flow cannot be stopped, bypass pipes and reliable stop valves should be installed. When measuring, make sure that there is no leakage in the bypass pipe.

In the position where the sensor is installed in the newly laid pipeline, a short pipe is first inserted to replace the sensor. After the “line sweeping” work is completed and the pipeline is cleaned, the sensor is formally connected. Due to neglect of this task, it is not uncommon for wire sweeping to damage the sensor.

If the fluid contains impurities, a filter should be installed on the upstream side of the sensor. For those that cannot stop the flow, two sets of filters should be installed in parallel to remove impurities in turn, or self-cleaning filters should be selected.

If the measured liquid contains gas, a muffler should be installed on the upstream side of the sensor. The sewage outlet and air elimination outlet of the filter and muffler should lead to a safe place.

If the installation position of the sensor is at the low point of the pipeline, in order to prevent the impurities in the fluid from settling and stagnating. A discharge valve should be installed in the subsequent pipeline to discharge the precipitated impurities regularly.

The flow regulating valve should be installed downstream of the sensor, and the stop valve on the upstream side should be fully open when measuring. And these valves must not produce vibration and leak outward. For processes that may generate reverse flow, check valves should be added to prevent reverse flow of fluid.

The sensor should be concentric with the pipe, and the sealing gasket should not protrude into the pipe. Liquid sensors should not be installed at the highest point of the horizontal pipeline. In order to prevent the gas accumulated in the pipeline (such as mixed gas when the flow is stopped) staying at the sensor, it is not easy to discharge and affect the measurement.

The pipelines before and after the sensor should be supported firmly without vibration. For condensable fluids, thermal insulation measures should be taken for the sensor and its front and rear pipelines.

Installation Requirements

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 phenomenon	Causes and Solution
1. There is no display when the liquid flows normally, and the cumulative volume does not increase	1) The power supply circuit or signal circuit is disconnected or poorly connected. Troubleshooting method: check with a multimeter to eliminate the fault point; 2) The printed circuit board of the display instrument, the connector is faulty or the contact is poor. Remedy: replace the printed circuit board; 3) The preamplifier is faulty. Troubleshooting method: Use an iron bar to move quickly under the detection head, if there is no signal output, check whether the coil is disconnected or the solder joint is desoldered; 4) The voltage supplied to the preamplifier is too low. Troubleshooting method: increase the power supply voltage to the specified requirements; 5) The impeller is stuck and does not rotate. Troubleshooting method: remove foreign matter, and clean or replace damaged parts, and re-calibrate after replacing parts;
2. When the flow is zero, the flow display is not zero, and the displayed value is unstable	1) Poor shielding and grounding of the transmission line, interference from the external electromagnetic field. Troubleshooting method: check the grounding and eliminate interference; 2) The pipeline vibrates, causing the impeller to vibrate. Troubleshooting method: strengthen the pipeline or install brackets before and after the flowmeter; 3) The shut-off valve is leaking. Troubleshooting method: overhaul or replace the valve; 4) Interference between circuit boards or electronic components inside the display is deteriorated and damaged. Troubleshooting method: take short circuit method”” or check one by one to find out the fault point;”
3. The displayed traffic does not match the actual traffic	1) The impeller is corroded and the blades are deformed. Troubleshooting method: Repair the impeller or re-calibrate after replacement; 2) The sundries hinder the rotation of the impeller. Troubleshooting: Clearing Debris; 3) The output signal of the detection coil is abnormal. Troubleshooting method: check the coil insulation resistance and conduction resistance; 4) The bypass valve is leaking. Troubleshooting method: close the bypass valve and replace it if necessary; 5) The flow velocity distribution upstream of the flowmeter is distorted or pulsating flow occurs. Troubleshooting method: find out the cause of distortion or pulsating flow, and take measures to eliminate it; 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

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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Related: the 10D/5D upstream/downstream rule.

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.

2. 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.

3. 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.

4. 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

More water measurement solutions

Sino-Inst is a manufacturer of electromagnetic flowmeters and ultrasonic flowmeters. It has been used for sea water-salt water flow measurement for a long time.

Sino-Inst supplies more than 30 types of seawater flow meters for sea water flow measurement. 55% are electromagnetic flowmeters and 45% are ultrasonic flowmeters.

Electromagnetic flowmeters and ultrasonic flowmeters have their own advantages in Sea Water Flow Measurement. You can choose the appropriate model based on your measurement needs and cost budget.

Sino-Inst’s Sea Water Flow Measurement – Magnetic vs Ultrasonic Flowmeters are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military chemicall, military industry, electric power, ship, machine tool, pipeline and other industries.

Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Sea Water Flow Meter, level sensors, or other equipment, please give us a call.

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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:

• What is the difference between an orifice flowmeter and a rotameter?
• What is the difference between a rotameter and a turbine flowmeter?
• What is the difference between a mass flowmeter and a rotameter?

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

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High Pressure Rotameter for Liquids/gas-Upto 25 Mpa is mainly used for small and medium diameter flow measurement. It can measure liquid, gas, steam, etc. Complete product series specifications, in all walks of life are widely used.

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