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Procedure and basis for selecting valve

The procedure and basis for selecting valve are as follows:

Steps for selection of articles

(1) JIS Marine valve Supplier shares that clear valve in equipment or device use, determine the working conditions of the valve: applicable medium, working pressure, working temperature and so on.

(2) determine and valve connection pipe nominal diameter and connection mode: flange, thread, welding, etc.

(3) determine the way to operate the valve: manual, electric, electromagnetic, pneumatic or hydraulic, electrical linkage or electro-hydraulic linkage.

(4) according to the pipeline transmission medium, working pressure, working temperature to determine the selection of valve shell and inner parts of the material: gray iron, malleable cast iron, ductile iron, carbon steel, alloy steel, stainless steel, acid resistant steel, copper alloy, etc.

5) choose the type of valve: closed circuit valve, regulating valve, safety valve and so on.

6 determine the valve type: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap, etc.

 

The selection criteria for valves:

In understanding the control of the selection of valve procedures, but also should further understand the basis of the selection of valves.

(1) the use of the valve, the use of operating conditions and control mode.

(2) the nature of the working medium: working pressure, working temperature, corrosion performance, whether it contains solid particles, whether the medium is toxic, whether it is flammable, explosive medium, medium viscosity and so on.

(3) on the requirements of valve fluid characteristics: flow resistance, discharge capacity, flow characteristics, sealing class, and so on.

(4) installation size and dimension requirements: nominal diameter, and pipe connection mode and connection size, dimension or weight limit.

(5) the reliability of valve products, service life and electrical devices, such as explosion performance additional requirements.

(note when selecting parameters: if the valve is to be used for control purposes, the following additional parameters must be determined: operating method, large and small flow requirements, pressure drop for normal flow, pressure drop at closing, large and small inlet pressure of the valve.)

According to the above selection of valve basis and steps, reasonable, correct selection of valves must also be a detailed understanding of the internal structure of various types of valves, so as to be able to choose the right valve to make the right choice.

That’s all for the sharing, thanks for your reading, and we also supply JIS marine gate valve for sale, if you have any demand for our products, just feel free to contact us.

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