What kind of media can be measured by vortex flowmeters?

The vortex flowmeter measures a wide range of media, it can be used to measure the flow of various industrial waters, including chemical, light industry, electric power, metallurgy, building materials, petroleum and other industries, and the measurement of some corrosive liquids, such as sulfuric acid, hydrochloric acid, nitric acid.

Acetic acid and other acids, as well as various chemical solutions, some low-viscosity oil flow measurement, such as gasoline, kerosene.

Diesel, heavy oil and residual oil with reduced viscosity after heating.

It is mainly used for flow measurement of industrial pipeline medium fluids, such as gas, liquid, steam and other media.

It is characterized by small pressure loss, large measuring range, high accuracy, and is almost not affected by fluid density, pressure, temperature, viscosity and other parameters when measuring the volume flow under working conditions. There are no moving mechanical parts, so it is highly reliable and requires little maintenance.

The instrument parameters are stable for a long time, and the vortex flowmeter adopts a metal capacitive sensor, which has high reliability and high accuracy, and can work in the operating temperature range of -20 +250.

The vortex flowmeter can measure liquid, gas, steam and other media, and it is not easy to measure high-temperature media in terms of temperature.

Here are some of the well-known brands recognized in the flowmeter industry that are widely recognized and have a great reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Vortex flowmeter.

It is composed of several parts, such as vortex generator, vortex frequency detection element and signal processing circuit. The vortex flowmeter, also known as the Kármán vortex flowmeter, is a vortex separation flowmeter made of the principle of natural oscillation of fluids. When a fluid flows through a columnar object at a sufficiently large flow rate, behind the columnar object, a neatly arranged and reversed vortex column is created along two parallel straight lines, called "Kármán vortex street."

phenomenon". The vortex frequency is proportional to the average flow velocity of the fluid and the frontal width d of the generator, which has the following relationship:

f = stv/d

Where: f - vortex frequency, hz;

d - width of vortex generator, m;

v - the average flow velocity of the fluid, m s;

st – Strauhar number, dimensionless.

Its numerical range is: st is the Reynolds number.

, st=(f l re).

When the Reynolds number Re is in the range of 102-105, the ST value is about, therefore, in the measurement, try to satisfy the Reynolds number of the fluid in the range of 102-105, and the vortex frequency f.

It can be seen that the average velocity of the fluid flowing through the vortex generator can be calculated by measuring the vortex frequency.

v, and then the flow rate q can be obtained by the formula q=va, where a is the cross-sectional area of the fluid flowing through the vortex generator.

The vortex flowmeter can be used for the flow measurement technology of gas, steam and liquid with the same sensor body, with high accuracy, wide range ratio and high temperature resistance, especially in the application of steam metering.

The vortex flowmeter is mainly used for the flow measurement of industrial pipeline medium fluids, such as gas, liquid, vapor and other media. It is characterized by small pressure loss, large measuring range, high accuracy, and is almost not affected by fluid density, pressure, temperature, viscosity and other parameters when measuring the volume flow under working conditions. There are no moving mechanical parts, so it is highly reliable and requires little maintenance.

The instrument parameters can be stable for a long time. The vortex flowmeter uses a piezoelectric stress sensor for high reliability and can operate in the operating temperature range of -20 +250. There are analog standard signals, there are also digital pulse signal output, easy to use with computers and other digital systems, is a relatively advanced, ideal measuring instrument.

The vortex flowmeter is made of carbon steel, which can measure various gases and liquids such as urban pipelines and industrial sewage, gas, and natural gas.

Vortex flowmeter 316L stainless steel material This material can also be called anti-corrosion vortex flowmeter, anti-corrosion vortex flowmeter its gauge material and probe are all pertetrafluorine material, also stainless steel material, it can be used to measure corrosive liquids, especially corrosive gases, such as acid and alkali solutions, etc., with the characteristics of corrosion resistance.

The material of vortex flowmeter is stainless steel or carbon steel, which is selected according to the needs of the site.

All vortex flowmeters are based on the Karmen vortex principle, a phenomenon observed and studied by the American-Hungarian scientist von Kármán in 1911: when a fluid bypasses a non-fluid linear object, paired, alternately arranged, and reversed antisymmetric vortices are generated on the left and right sides of the object's wake. The generation of this vortex has a periodic, alternating nature, and the frequency of change is proportional to the velocity of the fluid, which is the Karmen vortex street phenomenon.

The vortex flowmeter is a flowmeter that uses the properties of this phenomenon to determine the velocity or flow rate of the fluid by measuring the shedding frequency of the eddy current.

After understanding the principle of vortex flowmeter, you should also know how to use the vortex flowmeter well.

After selecting the vortex flowmeter, the first thing to face is the installation of the vortex flowmeter. So what should I pay attention to when installing?

1) The flowmeter should be installed horizontally or vertically on the pipeline corresponding to the passage of the project. Due to the characteristics of the vortex flowmeter, in order to achieve accurate measurement, attention must be paid to ensure the slow pipe measurement, so the vortex flowmeter on the horizontal pipeline should generally be selected to be installed at a very low place in the pipeline, and the flow direction of the fluid should be from top to bottom when the vertical pipeline is vertical.

2) When the vortex flowmeter is used as a flow regulation, special attention should be paid to installing the flow control valve behind the flowmeter, otherwise the jet is easy to appear when the flow rate is small, and the stop flow is inversely proportional to the valve opening when the flow is adjusted.

3) The vortex flowmeter has very strict requirements for the front and rear straight pipes, and the upstream of the flowmeter should be guaranteed to have 10 to 40 times the pipe diameter, and the downstream should not be less than 5 times the pipe diameter. The length of the upstream straight pipe is determined by whether there is a right-angled bend, enlargement or reducer pipe in the upstream. In particular, it should be noted that in the case of meeting the requirements, the flowmeter should be installed as far as possible at the largest possible pipe position in the front and rear straight pipe sections.

4) Measure the temperature and pressure of the temperature and pressure point should be set at the vortex flowmeter outlet 5 times the caliber accident.

5) When installing the vortex flowmeter, it is necessary to avoid strong vibration and power frequency interference signals as much as possible, and if these situations cannot be avoided, measures such as shock absorption and shielding should be taken to minimize interference.

6) In high-temperature pipelines, vortex flowmeters must be installed vertically downward.

After the installation is realized, how should the vortex flowmeter be maintained?

The vortex flowmeter has no moving parts, so under normal use, there is less maintenance required. The mission of routine maintenance is: to see if the accumulation of instrument indication is normal; Check whether the power supply of the meter is normal; Check whether the instrument body connection is damaged and corroded; Check whether there is damage and corrosion to the external circuit of the instrument; Check whether there is any leakage at the connection between the surface body and the process pipeline; Check whether the instrument electrical junction box and electronic component box are well sealed.

When the measured medium is dirty or easy to scale, the inner wall of the flowmeter should be cleaned regularly, and the vortex generator and the detection probe should be protected during cleaning, and care should be taken not to damage its surface and edges. The end cover of the detection amplifier housing should be properly screwed down after wiring and debugging to ensure its tightness. Liquids and debris should not be left in the shell during maintenance inspections.

The vortex flowmeter can measure the flow rate of the medium more, mainly including the following points: 1. The vortex flowmeter can be used to measure the flow of various industrial waters, including chemical, light industry, electric power, metallurgy, building materials, petroleum and other industries.

2. Measurement of some corrosive liquids, such as sulfuric acid, hydrochloric acid, nitric acid, acetic acid and other acids, as well as various chemical solutions.

3. Flow measurement of some low-viscosity oils, such as gasoline, kerosene, diesel, as well as heavy oil and residual oil with reduced viscosity after heating.