Accurate selection of compressed air flow meter

Accurate selection of compressed air flow meter-Jiangsu Dingsheng Instrument Co., Ltd

Compressed air flow meters play an important role in industrial production, as they can measure liquid and gas media. Steel plants, power plants, coking and other enterprises all need to measure the compressed air flow rate, and the accuracy of their flow measurement is generally not high, only to know the approximate flow rate as a reference

When selecting a flow meter, five main factors should be considered: the characteristics of the measured fluid, production process conditions, installation conditions, maintenance requirements, and the characteristics of the flow meter. For compressed air flow meters, the above 5 factors should also be considered. Here, we will focus on discussing the characteristics, installation conditions, maintenance requirements, and several issues that should be noted when selecting flow meters.

1Accurate selection of compressed air flow meterFactors of:

1. We should pay attention to product selection and prioritize it. The following points should be noted:

·Whether the on-site pipeline installation conditions meet the requirements;

·Is there any signal interference on site;

·The power cord of the on-site flowmeter should not be shared or routed in the same cable tray as high-power equipment;

·User requirements for table configuration and power supply.

2. Pay attention to the correct installation of the meter, meet the requirements of the straight pipeline of the flowmeter as much as possible, and install it horizontally as much as possible. Note that the inner diameter of the meter should correspond to the inner diameter of the pipeline, and all flange bolts should be tightened to prevent dripping. Pay attention to the correct wiring of the meter. If it is exposed to the sun, rain and sun protection measures should be taken to protect the compressed air flowmeter.

3. The quality of compressed air flow meters is also crucial. Only good products can accurately measure and prevent fundamental malfunctions.

2、 Detail diagram of compressed air flow meter:

DS-WLUGB vortex flowmeter is mainly used for flow measurement of industrial pipeline medium fluids, such as gas, liquid, vapor, natural gas and other media. It is a relatively advanced and ideal flow meter. The vortex flowmeter has intelligent integrated pulse without display, intelligent integrated with display output, intelligent integrated with temperature and pressure compensation, and intelligent integrated plug-in type, which can solve various on-site working conditions for customers.

Working principle and installation:

When the fluid passes through a vortex generator composed of spiral blades, it is forced to vigorously rotate around the axis of the generator, forming a vortex. When the fluid enters the diffusion section, the vortex flow is subjected to backflow and begins to undergo secondary rotation, forming a gyroscopic vortex precession phenomenon. The precession frequency is proportional to the flow rate and is not affected by the physical properties and density of the fluid. The flow rate can be determined by measuring the frequency of secondary rotation and precession of the fluid using the detection element. And it can achieve good linearity over a wide range of flow rates. The flow calculation formula is:

K=f/q

Where:K——Flow meter coefficientl/m³

f——Vortex frequency Hz

q——volumetric flow ratem³/s

The instrument coefficient of a flowmeter is independent of the temperature, pressure, composition, and physical properties (density, viscosity) of the fluid within a certain range of structural parameters and specified Reynolds numbers.

Product performance:

·The structure is simple and sturdy, with no movable parts, high reliability, and very reliable for long-term operation.

·Easy to install and very convenient to maintain.

·The detection sensor does not directly contact the measured medium, with stable performance and long lifespan.

·The output is a pulse signal proportional to the flow rate, with no zero drift and high accuracy.

·Wide measurement range, with a range ratio of up to 1:20.

·Less pressure loss, lower operating costs, and more energy-saving significance.

·Within a certain Reynolds number range, the output signal frequency is not affected by the physical properties and composition changes of the fluid. The instrument coefficient is only related to the shape and size of the vortex generator, and there is no need to compensate when measuring the fluid volume flow rate. After replacing the accessories, there is generally no need to recalibrate the instrument coefficient.

Jiangsu Dingsheng Instrument Co., Ltd. is a key measurement and control engineering complete unit in China, specializing in the research and production of flow meters, liquid level instruments, and digital control instruments. The product technology is sourced from Germany and the United States, and gas and liquid measuring instruments are designed and produced according to standards. The product is widely used in trade settlement and measurement in various industries such as petroleum, chemical, environmental protection, metallurgy, power, transportation, food, medicine, military, scientific research, etc.