What are the flowmeters for measuring nitrogen

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:

In modern industrial production, efficient and accurate flow measurement is the key to ensuring process stability and improving energy efficiency management. Vortex flowmeters, with their advantages of simple structure, high reliability and wide application range, have become the “main force” in flow monitoring in industries such as petrochemicals, energy and power, metallurgy and pharmaceuticals, providing solid support for the intelligent upgrade of industry.

There are various types of flowmeters for measuring nitrogen, and each type has its specific application scenarios and advantages. The following are some common nitrogen flowmeters:

Vortex flowmeter is mainly used to set up a vortex generating body (resistance fluid) in the fluid, from both sides of the vortex generating body alternately to produce regular vortices, to measure the flow of fluid, vortex flowmeter is mainly used for industrial pipeline fluid flow measurement, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large range, high accuracy, and is almost not affected by fluid density, pressure, temperature, viscosity and other parameters when measuring volume flow under working conditions. In daily use, the output signal may be unstable, causing this phenomenon to be excluded from the following points:

1, pulse vortex flowmeter is a kind of high measurement accuracy, simple installation, small maintenance, a wide range of meters, is currently widely used in petrochemical, metallurgy, textile, urban construction, energy and other industries.

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 robust and durable construction of vortex flow meters contributes to their popularity in industrial settings. With no moving parts in direct contact with the fluid, these meters offer minimal maintenance requirements and extended operational life. Moreover, advancements in technology have allowed for the development of digital vortex flow meters that offer enhanced precision and communication capabilities, facilitating integration with modern process control systems.

Measuring medium：Liquid, gas, saturated steam, superheated steam
Accuracy：Liquid ±1.0%, gas (steam) ±1.5%, plug-in ±2.5%
Working pressure：1.6MPa，2.5MPa，4.0MPa，6.4MPa
Medium temperature：Ordinary type -40 ~ 150℃
Medium temperature type -40 ~ 250℃
High temperature type -40 ~ 350℃
Output signal：Three-wire voltage pulse, low level 0 ~ 1V,
high level > 4V, duty cycle 50%;
Two-wire system standard current 4 ~ 20mA;
Three-wire system standard current 0 ~ 10mA
Working environment：-35℃～+60℃，Humidity ≤95%RH
Working power supply：DC12V；DC24V
Material：Carbon steel, stainless steel
Explosion-proof type：Intrinsically safe ExibIICT6

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 vortex flowmeter can measure the flow rate of the medium by calculating the vortex separation frequency.

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)

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.

5 main points of vortex flow meter selection

Vortex flowmeter is a velocity flowmeter, which measures the volume flow rate in the working state. If you choose the table according to the volume flow rate, the mass flow rate provided by the customer should be converted into the volume flow rate under the working state, and then determine the diameter of the selected instrument against the volume flow parameter.

The vapor flowmeter has no moving parts, strong reliability, high precision, long life, and can measure the instantaneous flow and cumulative flow of liquid in a wide flow range.

Accuracy is another significant advantage of vortex flow meters. With advancements in technology, modern vortex flow meters can provide precise and repeatable measurements even in challenging flow conditions. This high level of accuracy makes them indispensable for applications where tight control over fluid flow rates is critical, such as in chemical manufacturing or custody transfer operations in the oil and gas industry.

1. There is fluid flow in the pipeline after power-on, but no signal output

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.

1. After power-on, there is fluid flow in the pipeline, but the vortex flowmeter has no signal output

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, relatively high performance and price characteristics.

In the selection process of the vortex flow meter, in addition to the selection of a high-precision type in a comprehensive consideration of the demand, other accessories of the vortex flow meter are also very important, such as the selection of flow transmitters and the selection of compensatory pressure transmitters.

Vortex flowmeter is widely used in various industrial environments, in view of some small problems commonly encountered in the installation of vortex flowmeter, Aister gives the following points, hoping to solve the problems encountered in the installation.

Vortex flowmeters are suitable for measuring the mass flow and volume flow of superheated steam, saturated steam, compressed air, general gas, water and low corrosive liquids. We often encounter the following failures in the use of vortex flow meters:

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)

At present, many users often think that the purchase of a high-price flow meter can get accurate measurement results. The measurement of steam is different from other fluids such as water, air and other media, and there are many factors affecting its measurement in the actual measurement.

In industrial process control, energy measurement and gas/liquid flow monitoring, vortex flowmeters have become an important choice for flow measurement due to their advantages such as simple structure, wide range and high stability. However, in the face of different working conditions and application requirements, how to make the correct selection is of vital importance. This article will start from the key parameters to provide you with a detailed analysis of the selection points of vortex flowmeters, helping you achieve the best configuration.

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:

In the process of using the steam flowmeter, we may encounter some minor failures, do not panic after the problem, find out how to deal with is the key. The following introduces several common faults of steam flowmeters and their solutions.

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.

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:

Vortex flowmeter is a commonly used flow meter, the use of any instrument is inseparable from daily maintenance and maintenance, whether it is its own failure or interference by external factors, we calmly respond to the occurrence of failure.

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.