Industrial Vortex Flow Meters for Gas, Liquid, Steam
Vortex flow meters work based on the Karman vortex principle. Can be used for flow measurement of various industrial gases, liquids and steam.
● Wide measuring range and small pressure loss. Measurable nominal diameter: DN15～DN300mm;
● Various structural forms, including flange installation, wafer installation, insert installation, thread installation, clamp installation, etc.;
● High measurement accuracy. Liquid ±1.0%, gas (steam) ±1.5%, plug-in ±2.5%;
● Supports integrated and split temperature and pressure compensation;
● A wide range of measurable media. Including liquid, gas, saturated steam, superheated steam;
Featured Vortex Flowmeters Products
Vortex flowmeter is a volume flowmeter developed based on the Karman vortex principle to measure the volume flow rate of gas, steam or liquid, the volume flow rate under standard conditions or the mass flow rate. It is mainly used for flow measurement of industrial pipeline media fluids, such as gas, liquid, steam and other media.
Sino-Inst can configure the appropriate vortex flowmeter according to your needs. Including temperature and pressure compensation integrated vortex flowmeter, insertion vortex flowmeter, clamp type, threaded type, flange wafer type vortex flowmeter, etc.
When measuring gas or steam with a vortex flowmeter, the temperature and pressure compensation function must be considered. Through temperature and pressure compensation, the working condition volume flow rate can be converted into a mass flow rate or a standard condition volume flow rate.
Vortex flow meters can be adapted to the measurement of liquids, gases, and steam. Vortex flowmeters can also be customized to withstand high process pressures and temperatures.
The vortex flowmeter has no moving parts, the measuring part has a simple structure, stable performance and a long service life. Small pressure loss and high stability.
The vortex flowmeter has analog standard signals and digital pulse signal output, which is easy to use with digital systems such as computers. It is a cost-effective intelligent flowmeter.
Choose Sino-Inst for More Stable Vortex Flowmeters
Vortex flow meter also called Vortex shedding flow meter, also known as Karman vortex flow meter. It is a vortex separation type flow meter made by using the principle of natural fluid oscillation.
We at Sino-Inst have many years of experience in supplying vortex flowmeters. On the basis of standard vortex flowmeters, we customize vortex flowmeters with special parameters for many customers. For example, high temperature 350℃, large diameter pipe plug-in installation. Or, small diameter threaded or clamp connection.
Contact our engineers to customize your exclusive vortex flowmeter!
Industrial Vortex Flow Meters for Gas, Liquid, Steam Applications
Industrial gas measurement
Vortex flow meters are widely used in the measurement of industrial gases, including: compressed air, oxygen, nitrogen, natural gas, hydrogen, methane, butane, chlorine, etc.
Liquid measurement
Vortex flow meters can be used in different types of liquid media such as water, high-temperature water, oil, food liquids, chemical liquids, etc.
Superheated steam measurement
Vortex flow meters are the flow meters of choice for measuring steam. Configurable with integrated temperature and pressure compensation. Superheated steam is obtained by heating saturated steam and is an actual gas.
Saturated steam measurement
Steam without heat treatment is called saturated steam. When the vortex flowmeter measures saturated steam, the temperature or pressure can be selected separately for compensation calculations.
More Information
| Measuring medium | Liquid, general gas, steam |
| Nominal diameter | Full tube type: DN15~DN300 Insertion type: DN200~DN2000 Threaded connection type: DN15~DN50 Clamp connection type: DN15~DN50 |
| Medium temperature | Normal temperature: -40~100℃ Medium temperature: -40~250℃ High temperature: -40~320℃ Ultra-high temperature: -40~350℃ |
| Nominal pressure | 1.6MPa, 2.5MPa, 4.0MPa |
| Accuracy | Full tube type: ±1.5%R, ±1.0%R. Consult and confirm. Insert type: ±2.5%R, ±1.5%R. Consult and confirm. |
| Power supply | +12VDC (three-wire pulse output) +24VDC (three-wire pulse output, two-wire 4-20mA output, four-wire RS485 communication) 3.6V lithium battery, dual power supply |
| Transmission distance | Three-wire pulse ≤300m Two-wire system 4-20mA≤700m Four-wire RS485 communication ≤1200m |
| Material | Clamping type: 304 stainless steel, 316L, matching flange bolts and nuts: carbon steel, stainless steel; Flange type: 304 stainless steel, 316L; Insertion type: probe rod 304 stainless steel, flange: carbon steel, stainless steel |
| Protection level | IP65 |
| Explosion-proof level | Explosion proof: ExdIICT2~T6Gb; Intrinsically safe: ExiaIICT2~T6Gb; |
| Environmental conditions | Temperature: -20℃~+55℃; Relative humidity: 5%~95%RH Atmospheric pressure: 86Kpa~106Kpa |
Vortex Flow Meter Working Principle
The vortex flowmeter measures volume flow based on the Karman vortex principle. The vortex flowmeter is composed of a vortex generator, a detection probe and corresponding electronic circuits.
A non-streamlined vortex generating body (blocking member) is provided in the fluid. Then two rows of regular vortices are alternately generated from both sides of the vortex generator, and this vortex becomes the Karman vortex street. As shown below:
The vortex rows are arranged asymmetrically downstream of the vortex generator. Suppose the frequency of vortex generation is f, the average velocity of the incoming flow of the measured medium is V, the width of the flow-facing surface of the generating body is d, and the diameter of the surface body is D. According to the Karman vortex street principle, there is the following relationship:
f=StV/d
In the formula:
F – Karman vortex frequency generated on one side of the generating body.
St-Strohal number (dimensionless number)
V-average flow velocity of fluid
d-width of vortex generator
It can be seen that the instantaneous flow rate can be calculated by measuring the Karman vortex separation frequency. Among them, Strohal number (St) is a dimensionless unknown number. The following figure shows the relationship between Strohal number (St) and Reynolds number (Re).
In the curve table, the straight part of St=0.17. The release frequency of vortex is proportional to the flow speed, which is the measurement range of the vortex flow sensor. As long as the frequency f is detected, the flow rate of the fluid in the tube can be found. The volumetric flow rate is determined from the flow velocity V. The ratio of the measured pulse number to the volume flow rate is called the instrument constant K.
K=N/Q(1/m³)
In the formula:
K=instrument constant (1/m³)
N=Number of pulses
Q=volume flow
Vortex Flow Meter vs Magnetic Flow Meter
Electromagnetic flowmeters and vortex flowmeters are relatively common measuring instruments. The measurement principles of the two are different, so their measurement media, measurement characteristics, and application fields are different.
1. Measurement principle
The vortex flowmeter utilizes the phenomenon that a vortex plate generates vortex as the fluid flows, and calculates the flow rate of the fluid by measuring the rotation frequency or rotation speed of the vortex plate.
The electromagnetic flowmeter uses the principle of electromagnetic induction to measure the flow of fluid by measuring the electromotive force received by the conductive fluid when it flows in the magnetic field. From a principle point of view, the difference between the two is obvious.
2. Structural form
The vortex flowmeter is composed of a vortex generator, a piezoelectric element, a flow guide and a magnetic circuit part. The transmitter housing is integrally die-cast with a steel plate or aluminum alloy plate, and the meter body and sensor are combined into an integrated unit instrument.
The electromagnetic flowmeter is composed of a conductive tube, an excitation coil, a shell and an electrode. There are secondary meters installed on the upper and lower ends of the electrode.
3.Use occasions
Vortex flow meters are mainly suitable for measuring the flow of liquids, steam and gases. They are not suitable for measuring viscous liquids, granular solid media and liquids containing foam and bubbles.
The electromagnetic flowmeter is suitable for measuring the flow of various conductive liquids and cannot measure non-conductive media. It cannot measure the flow rate of gas or steam.