Vortex flow meter is suitable for measuring steam as well as a variety of liquids and gases. Wafer Flange Vortex Flowmeter is suitable for low pressure pipes. Cost is lower.

Features of Wafer Flange Vortex Flowmeter

1. Suitable for use in petrochemical and other hazardous situations requiring explosion protection;
2. Explosion-proof certification mark: Ex ia ⅡC T6 Ga;
   • Explosion-proof vortex flowmeter. It is not allowed to open the circuit shell when the power is on. It is necessary to alternately switch on and off the power supply for repeated adjustments, which is inconvenient and prone to errors and dangers;
   • Intrinsically safe vortex flowmeter. It can be operated at will when the power is on, which is convenient and safe.
3. It has a very unique medium versatility. It can be used for flow measurement and control of most steam, gas and liquid;
4. Simple structure, no holes and gaps design, no wear, dirt resistance, no moving parts, low failure rate, high stability and reliability;
5. Integrated design of temperature and pressure compensation;
6. The meter body is made of stainless steel, which is suitable for the measurement of corrosive media;
7. On-site LCD display, pulse, 4-20mA output or 485 communication, can be connected with industrial automation syst

Specifications of Wafer Flange Vortex Flowmeter

Measuring medium	Superheated/saturated steam, liquid and gas
Measuring range	See flow range table for details
caliber	Wafer type/flange type: DN15~DN400~DN1000
Medium temperature (℃)	(-40~80)℃, (-40~150)℃, (-40~300)℃, (-40~400)℃
Environment temperature (℃)	(-20~+70)°C atmospheric pressure: 86kPa～106kPa
Nominal pressure	Liquid 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa, 5.0MPa, 6.3MPa, 10.0MPa, 25MPa Gas and steam 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa, 5.0MPa
Accuracy	±1.0%, ±1.5%
Flow rate range (m/s)	Liquid: 0.15~7 Gas: 1.5~60 Steam: 2~70
output signal	Three-wire voltage pulse: high level≥5V low level<1V Standard current signal: (4-20) mA standard current signal proportional to the flow rate, local display flow, cumulative flow. And output proportional to the flow rate (4-20) mA standard current signal and pulse frequency signal Communication method: RS-485 communication
Power supply	Three-wire voltage pulse: DC12V, DC24V Standard current output, local display: DC24V Battery power supply (lithium battery): 3.6V
Ambient temperature	(-20~+70)°C atmospheric pressure: 86kPa~106kPa
Protection level	IP65
Explosion-proof grade	Intrinsically safe Ex ia ⅡC T6 Ga
display	LCD displays instantaneous flow, cumulative flow, vortex frequency, temperature and pressure (integrated temperature and pressure)
Cable interface	M20×1.5 (internal thread, recommended); 1/2NPT (internal thread)
Installation form	Integrated installation; split installation (the measuring tube and the indicator are connected by a 10-core special shielded cable)

Vortex Flowmeter Installation Method

Vortex flowmeters are divided into different installation forms: flange type, clamp type, plug-in type, thread type and clamp type.

When selecting the vortex flowmeter, the flange type is given priority, followed by the clamping type and the plug-in type.

The reason is that the accuracy of clamp-on and insertion type is greatly affected by the installation, and non-standard installation will produce errors.

The installation methods of vortex flowmeters differ as follows:

• Flange type: The instrument is connected to the process pipeline through its own flange, with high pressure resistance and large caliber range. high cost.
• Clamping type: The instrument is clamped and fixed on the process pipeline by the flange on the pipeline, with low pressure resistance and small caliber range. low cost.
• Plug-in type: suitable for large diameter pipes. Ball valves can be installed. Convenient online installation and disassembly.
• Threaded type: Threaded installation can only be used for small diameter pipes. Internal thread/external thread installation can be customized.
• Clamp type: 316 stainless steel clamp accessories. It is suitable for food, medicine and other hygiene industries. Installation is quick and easy.

Vortex Flowmeter Working Principle

Vortex flowmeter is a speed-type flowmeter produced according to karman’s vortex principle,
which can be used for the measurement and measurement of conventional gas, steam and
liquid.

Vortex flow sensor has high precision and wide range ratio, no moving parts in use, which can
improve mechanical stability and reduce maintenance.Vortex flowmeter is almost not affected by the temperature, pressure and composition of medium when measuring the volume of working condition.

Therefore, it is convenient to calibrate the instrument, so vortex street flow sensor is widely used in production and life.

When a trigonal column vortex generator is set in the fluid, regular vortices are generated alternately on both sides of the vortex generator, which is called Carmen vortex.

The vortex columns are arranged asymmetrically downstream of the vortex generator. Vortex flowmeter is produced according to this principle.

Vortexes are generated by generating bodies and the number of vortexes is detected by high-sensitivity sensors. In a certain range, the number of vortexes generated is proportional to the flow rate.

In vortex flowmeter, the relationship between flow rate and the number of vortexes generated
can be expressed by the following formula：

The formula of standard table method calibration coefficient K:

The formula can also be used for flow correction.

Read more about: Vortex Shedding Flow Meter Working Principle

Vortex flowmeter advantages and disadvantages

Advantages of vortex flowmeter

• The vortex flowmeter has no moving parts, and the measuring element has a simple structure, reliable performance and long service life.
• The vortex flowmeter has a wide measuring range. The turndown ratio can generally reach 1:10.
• The volume flow of the vortex flowmeter is not affected by thermal parameters such as the temperature, pressure, density or viscosity of the fluid being measured. Generally, no separate calibration is required. It can measure the flow of liquid, gas or steam.
• The pressure loss caused by it is small.
• The accuracy is high, the repeatability is 0.5%, and the maintenance is small.

Disadvantages of vortex flowmeter

• The volume flow of the vortex flowmeter is not affected by the temperature, pressure, density and other thermal parameters of the measured fluid. But the final measurement result of liquid or steam should be the mass flow rate, and for gas, the final measurement result should be the standard volume flow rate. Both mass flow and standard volume flow must be converted by fluid density, and changes in fluid density caused by changes in fluid working conditions must be considered.
• The factors that cause errors are: errors caused by uneven pipeline flow rates; inability to accurately determine the density of the medium when fluid conditions change; and the wet saturated steam is assumed to be dry saturated steam for measurement. If these errors are not limited or eliminated, the total measurement error of the vortex flowmeter will be very large.
• Poor vibration resistance. External vibration will cause errors of the vortex flowmeter, or even fail to work normally. The high-velocity impact of the channel fluid will cause additional vibrations to the cantilever of the vortex generator, which reduces the measurement accuracy. The influence of large pipe diameter is more obvious.
• Poor adaptability to measuring dirty media. The generating body of the vortex flowmeter is very easy to be dirty by the medium or entangled by the dirt, and the change of the geometric body size will greatly affect the measurement accuracy.
• High requirements for straight pipe sections. Experts pointed out that the straight pipe section of the vortex flowmeter must ensure the front 40D and the 20D to meet the measurement requirements.
• Poor temperature resistance. Generally, vortex flowmeters can only measure the fluid flow of media below 300°C.

More Featured Vortex Flowmeters

Sino-Instt offer over 10 Voretx FlowMeters, with Best Price.

A wide variety of Voretx Flow Meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.

Sino-Inst is Voretx Flow Meter suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.

Hygienic Flow Meter uses stainless steel tri-clamp fittings. Meet the hygiene measurement requirements of food-processing and bio-technology/ pharmaceutical industries.

Features of Vortex Hygienic Flow Meter

1. Dedicated to the sanitary industry, simple internal components, clamp connection;
2. Software configuration can realize various configurations required for different measurements of different media;
3. Parameter setting can set the measurement parameters of different fluids. Example: gas deviation coefficient, instrument coefficient, rated value, etc.;
4. Self-diagnosis diagnoses the setting parameter range, generator output signal, signal sending and receiving, CPU failure, etc.;
5. Display function Various parameters such as diagnostic code, flow, total, flow percentage, etc.;
6. On-site LCD display, pulse, 4-20mA output or 485 communication, can be connected with industrial automation system.
7. Integrated design of temperature and pressure compensation;

Specifications of Vortex Hygienic Flow Meter

Measuring medium	Gas, liquid, vapor
Caliber specification	DN15-300
Flow measurement range	Normal flow rate range of the measuring child: gas 5~50m/s; liquid 0. 5~7m/s
measurement accuracy	1.0 level 1.5 level
Measured medium temperature	Room temperature -25℃～10℃ High temperature -25℃～150℃ -25℃～250℃
Material	Stainless steel 304 stainless steel
power supply	DC24V or lithium battery 3.6V
Explosion-proof grade	Intrinsically safe type iaIIbT3-T6
Protection level	IP65

Extended reading: What Is Difference Between Rotameter And Flow Meter?

Sanitary Flow Meters

Common sanitary flow meters are sanitary magnetic flow meters and sanitary turbine flow meters. Composed of 304/316 stainless steel. A Sanitary flowmeter with Tri-Clamp fittings is easier to install and disassemble. Suitable for the food hygiene industry.

Read more about: Application of sanitary flow meters

Vortex flow meter advantages and disadvantages

Advantages of vortex flowmeter

• The vortex flowmeter has no moving parts, and the measuring element has a simple structure, reliable performance and long service life.
• The vortex flowmeter has a wide measuring range. The turndown ratio can generally reach 1:10.
• The volume flow of the vortex flowmeter is not affected by thermal parameters such as the temperature, pressure, density or viscosity of the fluid being measured. Generally, no separate calibration is required. It can measure the flow of liquid, gas or steam.
• The pressure loss caused by it is small.
• The accuracy is high, the repeatability is 0.5%, and the maintenance is small.

Extended reading: non contact flow meter

Disadvantages of vortex flowmeter

• The volume flow of the vortex flowmeter is not affected by the temperature, pressure, density and other thermal parameters of the measured fluid. But the final measurement result of liquid or steam should be the mass flow rate, and for gas, the final measurement result should be the standard volume flow rate. Both mass flow and standard volume flow must be converted by fluid density, and changes in fluid density caused by changes in fluid working conditions must be considered.
• The main factors that cause flow measurement errors are: measurement errors caused by uneven pipeline flow rates; inability to accurately determine the density of the medium when fluid conditions change; and the wet saturated steam is assumed to be dry saturated steam for measurement. If these errors are not limited or eliminated, the total measurement error of the vortex flowmeter will be very large.
• Poor vibration resistance. External vibration will cause measurement errors of the vortex flowmeter, or even fail to work normally. The high-velocity impact of the channel fluid will cause additional vibrations to the cantilever of the vortex generator, which reduces the measurement accuracy. The influence of large pipe diameter is more obvious.
• Poor adaptability to measuring dirty media. The generating body of the vortex flowmeter is very easy to be dirty by the medium or entangled by the dirt, and the change of the geometric body size will greatly affect the measurement accuracy.
• High requirements for straight pipe sections. Experts pointed out that the straight pipe section of the vortex flowmeter must ensure the front 40D and the 20D to meet the measurement requirements.
• Poor temperature resistance. Generally, vortex flowmeters can only measure the fluid flow of media below 300°C.

Extended reading: Food grade flow meters for Food & Beverage industry

Related Blogs

Extended reading: Ultrasonic Flow Meters Types & Technical Guide

Sino-Instt offers over 10 Vortex Hygienic Flow Meters, with the Best Price.

A wide variety of Vortex Hygienic Flow Meters options are available to you, such as free samples, paid samples. All of our flow meters can work with the AMS NEW TREX.

Sino-Inst is a Vortex Hygienic Flow Meter supplier, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.

High Temperature Flow Meter is suitable for high temperature flow monitoring. Suitable for high temperature, high pressure, safety and explosion-proof.

Features of Vortex Split High Temperature Flow Meter

1. Not affected by temperature and pressure. At the same time, it is not easy to block and scale. It is resistant to high temperature and high pressure, and is suitable for harsh environments.
2. The product has no wear, dirt resistance, no mechanical maintenance, and long service life.
3. The current output is electrically isolated, with good common mode interference suppression.
4. It can accurately measure the flow of gas, liquid and steam in a wide flow range without being affected by the physical properties of the fluid.
5. Simultaneous display of flow value and accumulated flow value, no need to switch in turn.
6. Adopt anti-vibration probe to effectively eliminate the influence of external vibration.
7. Using split signal converter, the cable length is 10 meters.
8. The circuit adopts surface mount technology, compact structure and high reliability.

Specifications of Vortex Split High Temperature Flow Meter

Measuring medium	Superheated/saturated steam, liquid and gas
Measuring range	See flow range table for details
caliber	Wafer type/flange type: DN15~DN400
Medium temperature (℃)	(-40~80)℃, (-40~150)℃, (-40~300)℃, (-40~400)℃
Environment temperature (℃)	(-20~+70)°C atmospheric pressure: 86kPa～106kPa
Nominal pressure	Liquid 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa, 5.0MPa, 6.3MPa, 10.0MPa, 25MPa Gas and steam 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa, 5.0MPa
Accuracy	±1.0%, ±1.5%
Flow rate range (m/s)	Liquid: 0.15~7 Gas: 1.5~60 Steam: 2~70
output signal	Three-wire voltage pulse: high level≥5V low level<1V Standard current signal: (4-20) mA standard current signal proportional to the flow rate, local display flow, cumulative flow. And output proportional to the flow rate (4-20) mA standard current signal and pulse frequency signal Communication method: RS-485 communication
Power supply	Three-wire voltage pulse: DC12V, DC24V Standard current output, local display: DC24V Battery power supply (lithium battery): 3.6V
Ambient temperature	(-20~+70)°C atmospheric pressure: 86kPa~106kPa
Protection level	IP65
Explosion-proof grade	Intrinsically safe Ex ia ⅡC T6 Ga
display	LCD display instantaneous flow, cumulative flow, vortex frequency, temperature and pressure (integrated temperature and pressure)
Cable interface	M20×1.5 (internal thread, recommended); 1/2NPT (internal thread)
Installation form	Integrated installation; split installation (the measuring tube and the indicator are connected by a 10-core special shielded cable)

Extended reading: Vortex Hygienic Flow Meter

Vortex Split High Temperature Flow Meter Applications

The split display type vortex flowmeter (external power supply, internal battery power supply) can measure almost all conductive, non-conductive, sound-conducting, non-sound-conducting, low-temperature, high-temperature, and viscous media, such as liquid, gas, and steam.

Split display type vortex flowmeter (external power supply, internal battery power supply) is widely used in schools, research institutes, food plants, chemical plants, petroleum, metallurgy, coal mines, pharmaceutical plants, hotels, restaurants, power plants, steel plants, etc. Large and small enterprises in various industries.

The split display type vortex flowmeter is an ideal product for obtaining data from scientific research experiments, real-time measurement of equipment consumption, factory performance evaluation, energy saving and emission reduction, and trade settlement between A and B.

Read more about: Vortex Shedding Flow Meter Working Principle

More Featured High Temperature Flow Meters

Here we simply list the temperature of the following different types of high temperature flow meters:

• Thermal mass flow meter ：max 300℃ (572℉)
• Coriolis mass flow meter: max 350℃ (662 ℉)
• Vortex flow meter: max 350°C (662 ℉)
• Balanced flow meter: max 800℃（1472 ℉）
• Magnetic flow meter :max 160℃ (320 ℉)
• Liquid Turbine flow meter: max 150℃ (302 ℉)
• Oval gear flow meter:max 200℃ (392 ℉)
• Variable Area Flow Meter/Metal Tube Rotameter: max 300℃ (572℉)
• Gas turbine flow meter: max 80℃（176℉）

Please note: high temperature flow sensor is customized ,not standard type. If you need to measure high temperature, please contact Sino-Inst sales engineer.

High temperature mass flow meter

High temperature ultrasonic flow meter

High temperature water flow meter

High temperature turbine flow meter

Sino-Instt offer over 10 High Temperature Flow Meters, with Best Price.

A wide variety of High Temperature Flow Meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.

Sino-Inst is High Temperature Flow Meter suppliers, located in China. High Temperature Flow Meter products are most popular in North America, Mid East, and Eastern Europe.

Nitrogen gas flow meter is used to measure the flow rate of N2 gas. Digital vortex flowmeter can be flange-Wafer-threaded installation. Threaded is suitable for small diameter pipes.

Features of Vortex Nitrogen Gas Flow Meter

• The nitrogen flow can be controlled more precisely to save costs.
• The nitrogen flow control can also prevent the nitrogen flow from being too large, resulting in insufficient heat supplementation.
• The amount of nitrogen output can be accurately known.
• The nitrogen flow meter has no movable parts, no wear, and dirt resistance. No mechanical maintenance is required, and the service life is long;
• The overall structure design of the instrument is reasonable, the dynamic measurement range is wide, and the pressure loss is small;
• The measurement is not affected by temperature and pressure, and is resistant to high temperatures & High pressure.

Specifications of Vortex Nitrogen Gas Flow Meter

Executive standard	《JB/T9249-2015 Vortex flow meter industry standard》
Diameter(mm)	15,20,25,40,50,65,80,100,125,150,200,250,300,(300~1000 plug-in)
Nominal pressure(MPa)	DN15-DN200 4.0(>4.0,Supply agreement)DN250-DN300 1.6(>1.6,Supply agreement)
Medium temperature(ºC)	Piezoelectric type :-40~150,-40~260,-40~330; Projected Capacitive:-40~400(upply agreement)
Body material	1Cr18Ni9Ti(Other material order by agreement)
Permissible vibration acceleration	Piezoelectric type :0.2g   Projected Capacitive:1.0-2.0g
Accuracy	±1%R,±1.5%R;plug-in:±2.5%R
Range of degrees	1:6~1:25
Power Supply	Sensor:DC+12V,DC+24V;Transmitter:DC+12V,DV+24V;Battery-powered:3.6V battery
Output signal	Pulse:high level:≥5V low level:≤1V;electricity current:4~20mA
Pressure loss coefficient	Comply with JB/T9249 standard Cd≤2.4
Explosion-proof coefficient	Intrinsic safety :Ex ia II CT2-T4 Explosion-proof type:Exd II CT2-T5
Level of protection	Ordinary type:IP65  Diving type:IP68
Environmental conditions	Tempersature:-20ºC~55ºC,relative humidity 5%~90%,atmospheric pressure:86~106kPa
Applicable medium	gas ,liquid,steam
Transmission distance	Three-wire pulse output:≤300m,Two-wire standard current output:(4~20mA)≤1500m load resistance≤500Ω;RS485/HART≤1200m.
Counduit entry	Thread M20*1.5 or other

You may like: Digital Flow Meters Guide| Liquid and Gas

What is the difference between Wafer type and screw type connection vortex flowmeter?

Three connection methods: Wafer, thread, flange, etc.:

The flange connection can be selected according to the process requirements, according to different joint surfaces, pressure levels, etc.

Wafer type can be used for various pipe diameters, but the pressure level is not too high.

The application of threaded connection is relatively small, such as small diameter, medium and low pressure, etc.

Read more about: Liquid Flow Meters Guide

Nitrogen Gas Flowmeters-Liquid Nitrogen Flowmeters

5 matters to pay attention to when choosing threaded Vortex Nitrogen Gas Flow Meter

The principle of the vortex flowmeter is to install a stagnant part in the flowmeter pipe. When the fluid flows through the stagnant part. Due to the stagnant effect on the surface of the stagnant part, there will be two asymmetric rows downstream.

These vortices are separated on the side and rear of the stagnant member to form a so-called Karman vortex train. The rotation directions of the two vortices are opposite. Karman theoretically proved that when h/L=0.281, the vortex train is stable. h is the width between two vortex rows, and L is the distance between two adjacent vortices

Correct selection can ensure the better use of threaded connection vortex flowmeter.
What kind of vortex flowmeter should be selected according to the physical and chemical properties of the fluid medium to be measured?

1. Precise function inspection

Accuracy grade and function Choose the instrument accuracy grade according to the measurement requirements and use occasions, so as to be economical and cost-effective.
For example, it is used for trade settlement, product handover and energy metering occasions. The accuracy level should be higher, such as 1.0, 0.5, or higher.

For process control occasions, different accuracy levels can be selected according to control requirements.

For some occasions that just check the process flow and do not need to do precise control and measurement, you can choose a slightly lower accuracy level, such as 1.5, 2.5, or even 4.0. In this case, you can choose a cheap plug-in vortex flowmeter.

2. Measurable medium

When measuring general media, the full-scale flow of the vortex flowmeter can be selected within the range of 0.5-12m/s of the measured medium flow rate, and the range is relatively wide.
The selected instrument specification (caliber) is not necessarily the same as that of the process pipeline. It should be determined whether the measurement flow range is within the flow rate range. That is, when the flow rate of the pipeline is low and cannot meet the requirements of the flow meter or when the measurement accuracy cannot be guaranteed at this flow rate. It is necessary to reduce the caliber of the instrument to increase the flow velocity in the pipe and obtain satisfactory measurement results.

3. Selection of screw connection vortex flowmeter transmitter

In the saturated steam measurement, the VA piezoelectric vortex flow transmitter is used. Because the vortex flowmeter has a wide range. Therefore, in practical applications, it is generally considered that the flow rate of the saturated steam should not be lower than that of the vortex flowmeter. Lower limit. That is to say, the fluid velocity must not be lower than 5m/s.

Vortex flow transmitters of different calibers can be selected according to the amount of steam used. The caliber of the transmitter cannot be selected by the caliber of the existing process pipeline.

4. Selection of pressure compensation pressure transmitter

Because the saturated steam pipeline is long, the pressure fluctuates greatly. Pressure compensation must be used. Considering the corresponding relationship between pressure, temperature and density, only pressure compensation can be used in the measurement. Because the pipeline saturated steam pressure is in the range of 0.3-0.7MPa. Pressure The range of the transmitter can be 1MPa.

5. Selection of display instrument for screw connection vortex flowmeter

Intelligent flow indicator, with functions of voltage stabilization compensation, instantaneous flow display and cumulative flow accumulation.

Further reading: Nitrogen(N2) Flow Meter Types

Digital Nitrogen Gas Flow Meters

Currently, on the market, there are four main instruments that can measure nitrogen flow:

Extended reading: liquid nitrogen level measurement

Nitrogen Gas Flow Measurement

Nitrogen is required in many processes of the chemical and pharmaceutical industry; predominantly as protective gas, to prevent the occurrence of explosive atmospheres。

Such as when handling dusty products or solvents.

If your work requires you to use nitrogen, having a flow meter installed on your tank is a great way to save some money.

These indicators let you know whether gas is moving through the line, often via the use of a levitating ball, a pressure gauge, or other visual cues.

These options are simple to use and reliable, making them must-haves for welders, HVAC technicians, and more.

There are many types of Nitrogen gas flow meters. There are three types of flow meters commonly used to measure nitrogen. Precession vortex flowmeter, gas vortex flowmeter, thermal gas mass flowmeter. When selecting a model, it is necessary to select a suitable model and specification according to the parameters and cost that can be provided on-site.

Read more about:
Benefits Of Digital Gas Mass Flow Meters

Related Blogs

Extended reading: Cryogenic Flow Meters | Liquid Nitrogen-Liquid Oxygen

Sino-Instt offer over 10 Threaded Vortex Nitrogen Gas Flow Meters, with Best Price.

A wide variety of Threaded Vortex Nitrogen Gas Flow Meters options are available to you, such as free samples, paid samples. All of our fNitrogen Gas Flow Meters can wokrk with the AMS NEW TREX.

Sino-Inst is Threaded Vortex Nitrogen Gas Flow Meter suppliers, located in China. Nitrogen Gas Flow Meter products are most popular in North America, Mid East, and Eastern Europe.

Compressed air flow meter is a upgraded and improved gas vortex flow meter. The karman vortex air flow sensor is researched and produced according to the Karman vortex principle.

Features of Vortex Compressed Air Flow Meter

1. Easy to install. Suitable for the measurement of compressed air, nitrogen, argon and other gases;
2. Integrated temperature and pressure dual compensation. The instantaneous flow and accumulated flow, temperature, pressure and other data after compensation can be directly read on the meter head;
3. The most advanced FFT spectrum analysis digital signal processing technology is adopted. The lower limit is low and the anti-vibration performance is excellent. It can be installed at the outlet of the air compressor to measure the air output of the air compressor;
4. RS485 communication output. Equipped with related conversion modules, it can output wireless signals such as NB and GPRS, which can be used with the Internet of Things platform;
5. Simple structure, no holes and gaps design. No wear, stain resistance, no moving parts. Low failure rate, high stability and reliability;
6. The vortex flowmeter uses the latest signal processing technology, and the entire system analyzes the measured signal. Then eliminates external interference and media disturbance. Therefore, stable measurement can be achieved even in harsh process conditions;
7. The piezoelectric element of the vortex flowmeter is embedded in the probe body. It does not touch the medium, and there is no filler inside. The pressure loss is small and the service life is long;
8. The original signal formed by the vortex flowmeter. The output frequency and flow rate are linear. There is no zero drift problem.

Specifications of Vortex Compressed Air Flow Meter

Measuring medium	compressed gas
Measuring range	See the flow range table of vortex flowmeter for details
口 Path	DN15~DN600
Connection method	Wafer type, flange type
Medium temperature (℃)	(-40~80)℃、(-40~400)℃
Environment temperature (℃)	(-30~+65)℃ Atmospheric pressure: 86kPa～106kPa
Accuracy	1.0%, 1.5%
Velocity range (m/s)	1.5~60
Output signal	1: No local display frequency signal: high level≥5V low level 1V, square wave, pulse duty ratio: 1:1, emitter follower output (optional open collector output) 2: Standard current signal; (4-20) mA standard current signal proportional to the flow 3: Local display instantaneous flow, cumulative flowmeter. Simultaneously output proportional (4-20) mA standard current signal and pulse frequency signal or (4-20) mA+HART 4: Communication method: RS485 communication
Power supply	Voltage pulse type: DC12V, DC24V Standard current output, local display: DC24V Battery powered local display lithium battery: 3.6V
Ambient temperature	Ambient temperature (-40~+55) ℃, relative humidity 5~90 ​​(%), atmospheric pressure: 86kPa~106kPa
Protection level	IP65 is used for indoor and outdoor installation, IP68 can be used for diving installation
Explosion-proof grade	Intrinsically safe Ex ia ⅡC T6 Ga
Show	Instantaneous standard flow, cumulative standard flow, pressure, temperature, instantaneous working condition flow, instantaneous cumulative flow, frequency
Cable interface	M20×1.5 (internal thread, recommended); 1/2NPT (internal thread)

Extended Reading: Digital air flow meters

Compressed Air Flow Meter Working Principle

The vortex compressed air flowmeter is a volume flowmeter that measures the volume flow of gas, steam or liquid, the volume flow or mass flow of the standard condition according to the Karman vortex principle.

When a triangular cylindrical vortex generator is installed in the fluid, regular vortices are alternately generated from both sides of the vortex generator. This type of vortex is called Karman vortex. When the fluid passes through the vortex flow transmitter in the pipeline, two rows of vortices proportional to the flow velocity are alternately generated up and down behind the vortex generator of the triangular column. The release frequency of the vortex is related to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator.

The temperature compensation integrated vortex flowmeter also has a temperature sensor. The temperature of saturated steam can be directly measured and the pressure can be calculated. This shows the mass flow of saturated steam.

The temperature and pressure compensation integrated type is equipped with temperature and pressure sensors for gas flow measurement. The temperature and pressure of the gas medium can be directly measured to display the standard volume flow rate of the gas.

Read more about: Importance Of Air Flow Measurement

Compressed Air Flow Measurement

Compressed air is an important secondary energy source for industrial production. Most of it is converted from electrical or thermal energy through compressors. The working fluids converted from a large amount of energy are managed to achieve the effect of saving energy and improving equipment management. Compressed air It is an important economic indicator for cost accounting of enterprises and institutions. This is the main purpose of compressed air flow measurement.

Compressed air flow is an important parameter that expresses the performance of an air compressor, and it is also an important parameter measured in an industrial process. With the widespread application of air compressors, accurate measurement of its flow is essential for product upgrades, industrial production process control and monitoring, and energy conservation and emission reduction.

Compressed air has the following characteristics. Sino-Inst suggestion: Combine the characteristics of compressed air to make a reasonable selection of compressed air flow meters.

Large vibration

Of course, not every air flow meter is installed in places with high vibration. However, the air flow meters installed in the compression plant and the blower room have to consider vibration issues. This vibration mainly comes from compressors and blowers.

The vibration of the machine can be transmitted to a long distance through the air duct or duct. Among them, the largest vibration is the reciprocating compressor. The vibration generated during the operation of large reciprocating compressors often drives the workshop and the surrounding ground to vibrate together. It poses a threat to the accurate and reliable operation of related air flow meters. It causes the fulcrum of the lever-type differential pressure transmitter to move and causes the meter to drift in indication. Vibration causes the vortex flow sensor to produce an interference signal corresponding to the vibration frequency, causing the flow indication to be significantly higher.

Gas with water

Compressed air is taken from the atmosphere, and the atmosphere always contains a certain amount of water vapor. The content of water vapor is expressed by the partial pressure of water vapor ps.

In rainy and foggy days, the partial pressure of water vapor in the outdoor atmosphere reaches saturation. That is, the relative humidity reaches 100%. At this time, compressing the atmosphere is like compressing a sponge that absorbs enough water. As the volume shrinks, there is a corresponding amount Water precipitates. This is the simple principle of compressed air with water.

In fine weather, the relative humidity of the atmosphere is low. However, as it is compressed and reduced to a fraction of its original volume, the partial pressure of water vapor will increase accordingly, and it may also enter a saturated state and precipitate water droplets.

Large-caliber orifice flow meters used to measure the flow of compressed air often have water in front of the orifice, which will affect the accuracy of the measurement. There is often a section of water in the impulse pipeline, causing the differential pressure measured by the differential pressure transmitter to be inconsistent with the differential pressure produced by the throttling device. These are common causes of errors caused by water in the air.

In addition, due to the high nitrogen oxide content in the urban atmosphere, the water droplets contained in the compressed air are acidic, causing corrosion on the surface of the annular chamber and corrosion of the inner wall of the pipeline. The surface becomes rough.

When the iron oxide produced by corrosion becomes dry under certain conditions, it is easy to fall off from the inner wall of the pipe and be carried by the airflow to the front of the orifice plate. This will also affect the flow rate indication. Therefore, these powdery and massive garbage should be removed when the flow is stopped for maintenance.

Pulsating flow

Most of the compressor and blower outlet fluids contain certain pulsation. For example, a reciprocating compressor exhibits half-wave pulsation. Observed at the scene that the outlet pressure of the compressor and blower swings significantly.

Among them, the pulsation frequency of the outlet of the positive (constant) displacement blower is relatively high, generally tens of Hz. The pulsation frequency of the outlet of the reciprocating compressor is relatively low, generally a few hertz.

Flow arterial movement causes high indications of various flowmeters such as differential pressure flowmeters and vortex flowmeters. Cause the float in the float flowmeter to jump up and down.

There are two common methods to eliminate and weaken the influence of flow arterial movement on the value of the flow meter.

One is to install a buffer tank at the compressor outlet to filter out pulsation. Instead, install the flowmeter behind the buffer. In fact, the systems of reciprocating compressors are designed in this way.

The second is to install the flowmeter away from the source of pulsation. In this way, the gas capacity of the process pipeline and its pipe resistance can be used to form a low-pass filter to attenuate the pulsation.

Read more about: Rotameter flow meter-Variable Area Flow Meters. Suitable for liquid and gas volumetric flow measurement and control.

Is temperature and pressure compensation required for Compressed Air Flow Meter?

Many users encounter such troubles: I am measuring compressed air, do I need temperature and pressure compensation?

SIno-Inst relieves your worries:

Whether you need temperature and pressure compensation depends on your requirements for measurement accuracy.

If you have high requirements for measurement accuracy, temperature and pressure compensation is the most accurate.

If you are not demanding and want to save costs, and the pressure fluctuation is not large, you do not need temperature and pressure compensation.

Extended reading: Featured Cheap flow meters for Sale

More Featured Compressed Air Flow Meter

Sino-Instt offer over 10 Vortex Compressed Air Flow Meters, with Best Price.

A wide variety of Vortex Compressed Air Flow Meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.

About 13% of these are magnetic flow meter, 14% are Insertion Magnetic Flow Meter, 25% are Venturi flow meter, 13% are Handheld ultrasonic flow meter, and others are Liquid Turbine Flow Meters.

Sino-Inst is Vortex Compressed Air Flow Meterr suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.

Vortex flow meter also called Vortex shedding flow meter. Vortex Flow Meter is suitable for flow measurement of steam and various liquids and gases.

Featured Vortex Flow Meters

Vortex Flow Meter Applications

The vortex flowmeter is mainly used in the flow measurement of industrial pipeline medium fluid. The medium can be gas, liquid, steam, etc.

Read more: Vortex flow meter for Steam Flow Measurement

The main scope of action includes:

• During industrial production, such as metallurgy, coal, electric power, chemical, pharmaceutical, environmental protection and other manufacturing;
• Energy measurement. Including the scientific measurement of primary and secondary energy. Such as coal, petroleum gas, natural gas, etc., to achieve energy saving and reduce consumption;
• Environmental protection engineering. Including flow measurement of flue gas, sewage, etc.;
• Transportation. Including pipeline transportation for control, distribution and scheduling, and better economic accounting through measurement results.

• Turbine flowmeter: Measuring oil, liquid
• Sewage flow meter: Measuring acid, sewage
• Electromagnetic flowmeter: Measuring acid, alkali, sewage
• Steam flow meter: Measure gas, steam
• Orifice flowmeter: Measuring steam, gas, liquid
• Insertion vortex flowmeter: Gas, steam, liquid

Extended reading: High Pressure Rotameter for Liquids/gas-Upto 25 Mpa

Vortex Flow Meter Working Principle

Vortex flowmeter is a speed-type flowmeter produced according to karman’s vortex principle,
which can be used for the measurement and measurement of conventional gas, steam and
liquid.

Vortex flow sensor has high precision and wide range ratio, no moving parts in use, which can
improve mechanical stability and reduce maintenance.Vortex flowmeter is almost not affected by the temperature, pressure and composition of medium when measuring the volume of working condition.

Therefore, it is convenient to calibrate the instrument, so vortex street flow sensor is widely used in production and life.

When a trigonal column vortex generator is set in the fluid, regular vortices are generated alternately on both sides of the vortex generator, which is called Carmen vortex.

The vortex columns are arranged asymmetrically downstream of the vortex generator. Vortex flowmeter is produced according to this principle.

Vortexes are generated by generating bodies and the number of vortexes is detected by high-sensitivity sensors. In a certain range, the number of vortexes generated is proportional to the flow rate.

In vortex flowmeter, the relationship between flow rate and the number of vortexes generated
can be expressed by the following formula：

Q：Operating volume flow of the measured medium. The unit is m3/h。
F：Frequency of the number of vortices produced by the generating body. The unit is Hz.
K：Refers to the calculated or calibrated flow coefficient. It represents how many frequency signals per cube. the coefficient is usually obtained by calibration.

The formula of standard table method calibration coefficient K:

The formula can also be used for flow correction.

More about vortex flow meter working principle wikipedia.

Endress+Hauser has a great explanation video about vortex flow meter working principle. Let’s take a look!

What are vortex flow meters used for?

Vortex flowmeter is mainly used for industrial pipeline medium fluid flow measurement. Such as gas, liquid, vapor and other media. Here are some related applications.

Extended reading: Ultrasonic Flow Meters Types & Technical Guide

Vortex Flow Meter Price

Price is always a topic of concern. Different types of vortex flowmeters can be found online, and the prices of different vortex flowmeter manufacturers are not consistent. The final quotation is still subject to the actual working conditions on site.

Vortex flow meters have different prices due to different calibers, different materials, different media, and different functions! The price list of vortex flowmeter is attached below for reference.

This is a reference price only. Not the price of the order transaction. Please contact our sales engineers. According to the measurement conditions, choose the appropriate model to confirm the price.

Full-tube piezoelectric vortex flow sensor (Including special flanges, bolts, and nuts)	DN15	515	559
DN20	326	312	415
DN32	357	312	415
DN65	349	363	488
DN80	378	407	488
DN125	459	503	606
DN250	518	569	509
DN300	500	544	662
DN600	544	588	662

Extended Reading: Types Of Crude Oil Flow Meters

Related Products:

Extended reading: Flow Totalizer F3000X for Data collection and calculation

Sino-Inst, Manufacturer for Vortex Flow Meters, like gas vortex flow meter, liquid vortex flow meter, sanitary vortex flow meter, insertion vortex flow meter, steam vortex flow meter, and natural gas vortex flow meter.

Sino-Inst’s vortex 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.