How to maintain the sensor of a steam flowmeter

Vortex flowmeters are versatile instruments commonly used in various industries for fluid flow measurement. Here are some applications of vortex flowmeters in different industries:

Precession vortex flowmeter without mechanical moving parts, small size, corrosion resistance, stable performance; It can directly display the working pressure, temperature, flow rate and gas volume under standard state of the medium; With the advantages of wide measuring range and small measuring error, the precession vortex flowmeter has been widely used in the production measurement of oil and gas Wells and the sales measurement of natural gas.

The insertion vortex flowmeter is mainly used for the flow measurement of large-diameter gas, liquid and steam medium in industrial pipelines. In order to ensure the accuracy of its measurement, the following points should be noted when installing:

Intelligent vortex flowmeters can measure air. Vortex flowmeter is a new flowmeter for flow measurement based on Karman vortex principle. It has good medium adaptability and can directly measure the volume flow of various media (including air). When measuring air, the vortex flowmeter generates regular vortices through the triangular column vortex generator set in the fluid, and the frequency of these vortices is proportional to the average velocity of the measured medium, so that the air flow can be calculated.

The water and wastewater treatment sector also benefits significantly from vortex flow meters. These meters are used to measure the flow of water in pipes, helping to monitor consumption, detect leaks, and optimize water treatment processes. Their robust construction and suitability for both clean and dirty water make vortex flow meters essential tools for managing water resources effectively.

The installation of the vortex flowmeter has different provisions, used to measure different measured media, different positions, then the installation method is not the same, the attention point is different, generally speaking, the vortex flowmeter has the following specified points:

Vortex flowmeters play an important role in the measurement of steam, gas and liquid flow due to their simple structure, high reliability and wide application range. The probe, as its core sensing component, directly affects the measurement accuracy and stability of the instrument. This article will comprehensively analyze the key technologies of vortex flowmeter probes for you, helping you make a worry-free selection!

Temperature and pressure compensation integrated vortex flowmeter performance advantages:

1. Vibration effect

Compressed air is generated by air compressor or high pressure fan. When these devices are in operation, they all have varying degrees of vibration, and sometimes the vibration is relatively strong, and this vibration is transmitted through the connecting pipe. When selecting and determining the position of the vortex flowmeter, this influencing factor should be fully considered. In various detection methods, the anti-vibration performance of the instrument is not the same due to different detection components. For the vortex street of the detection element, the vibration resistance can reach 0.5~1G. When determining the installation position of the vortex flowmeter, it should be as far away from the power equipment such as air compressors and fans as possible.

Vortex flowmeter is based on the Karman vortex street principle, which is mainly performed by setting a non-streamlined vortex generator (resistance fluid) in the flowing fluid, and alternately producing two columns of regular vortices from both sides of the vortex generator.

There are often some error factors in the calibration and use of flowmeter coefficient, which affect the accuracy of gas metering. The following are the factors that affect the accuracy of the steam flowmeter.

The factors that affect the accurate measurement of vapor gas flowmeter are mainly the following:

The power supply methods of the helical vortex flowmeter are diverse to meet the demands of different application scenarios. The main power supply methods include the following:

Vortex flowmeter common faults and solutions

Vortex flowmeters are mainly used for flow measurement of industrial pipeline material fluids, such as gases, liquids, and steam. Due to the small pressure loss, wide range and high accuracy of vortex flow, it is almost unaffected by fluid density, pressure, temperature and viscosity when measuring working conditions. If a flow error is reflected in the use of a vortex flowmeter, the first thing to do is to distinguish this error, which leads to a flow deviation.

Vortex flowmeters are widely used in the measurement of steam, gas and liquid flow due to their simple structure, high reliability and wide application range. However, this type of flowmeter is not omnipotent and may experience severe errors or even failure under certain working conditions. This article will reveal five key limitations of vortex flowmeters to help users avoid selection risks.

The causes of faults in the on-site metering system of the steam flowmeter can be summarized into two major reasons: one is caused by the flowmeter or its related equipment; The second reason is not related to the flowmeter, that is, the flowmeter is normal, but the fault is caused by environmental or system reasons.

Due to the compressibility of the gas, its flow measurement is more complex than that of the liquid, and the output signal of the vortex flowmeter is related to the gas density in addition to the input signal, and the density of the gas is a function of temperature and pressure (referred to as temperature and pressure).

The installation of the vortex flowmeter has different provisions, used to measure different measured media, different positions, then the installation method is not the same, the attention point is different, generally speaking, the vortex flowmeter has the following specified points:

Vortex flowmeter is also known as Karman vortex flowmeter. Vortex flowmeter is a kind of separation flowmeter made by using the principle of natural oscillation of fluid. When a fluid flows at a sufficiently large velocity through an object perpendicular to the direction of the fluid, if the object is of appropriate size, it will produce a neatly aligned and reversed vortex train behind the object along two parallel lines.

In the field of industrial gas flow measurement, vortex flowmeters, with their simple structure, high stability and wide application range, have become the ideal choice for monitoring the flow of various gases such as natural gas, steam and compressed air. Based on the Karman vortex street principle, it calculates the flow rate by detecting the vortex frequency generated when the fluid passes through the blocking fluid, and can achieve high-precision measurement without temperature and pressure compensation. The following is an analysis of the typical applications and technical advantages of vortex flowmeters in gas measurement.

Nominal diameter: DN25～DN300mm
Accuracy: liquid ±1.0%, gas (steam) ±1.5%, plug-in ±2.5%
Material: 304, 316L various materials
Measuring media： Steam, compressed air, liquid (single phase media)

Precautions for installation and use of vortex flow meter

Vortex flowmeter can be widely used in large, medium and small kinds of pipeline water supply and drainage, industrial circulation, sewage treatment, oil and chemical reagents and compressed air, saturated and superheated steam, natural gas and various media flow measurement and can be used as a flow transmitter in automatic control system, long service life. Points of attention for vortex flowmeter installation:

The method and requirements of temperature compensation will vary according to the specific application. In general, temperature compensation can be used in the following ways:

Measured Medium: Liquid, Gas, Steam
Medium Temp: -40℃~+200℃; -40℃~+280℃; 40℃~+350℃
Nominal Pressure: 1.6MPa;2.5MPa;4.0MPa;6.4MPa(Other pressure can be custom,need consult supplier)
Accuracy: 1.0%(Flange), 1.5%(Insertion)
Material: SS304(Standard), SS316(Optional)

Vortex flowmeter is widely used because of its wide range, small pressure loss, medium accuracy, linear output, no moving parts, high reliability, small maintenance, medium low price, and relatively high performance price characteristics.

Insertable vortex flowmeters are widely used in the measurement of steam, gas and liquid flow due to their advantages such as simple structure, easy installation and low cost. However, in practical applications, its measurement performance is limited by multiple factors. If the selection or use is improper, it may lead to data deviation or even equipment damage. This article will conduct an in-depth analysis of the main limitations of the insertable vortex flowmeter to help users make reasonable selections and optimize their usage.

Many owners will occasionally encounter that the vortex flowmeter does not have a flow display when using the vortex flowmeter. For this situation, Aister gives the following treatment methods:

The working principle of vortex flowmeter is to place a non-streamlined vortex generator in the fluid, so that the fluid is alternately separated on both sides of the generator, releasing two series of regularly staggered vortex flowmeter. In a certain range, the vortex separation frequency is proportional to the flow rate, and the flow rate of the medium can be measured by calculating the vortex separation frequency.