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Brief introduction of air pressure reducing valve

Brief introduction of air pressure reducing valve

  • Categories:Industry news
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  • Origin:
  • Time of issue:2020-09-13
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(Summary description)The air pressure reducing valve is a special device that automatically reduces the working pressure of the pipeline. It can reduce the higher liquid pressure in the pipeline before the valve to the level required by the pipeline behind the valve.

Brief introduction of air pressure reducing valve

(Summary description)The air pressure reducing valve is a special device that automatically reduces the working pressure of the pipeline. It can reduce the higher liquid pressure in the pipeline before the valve to the level required by the pipeline behind the valve.

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2020-09-13
  • Views:0
Information

The air pressure reducing valve is a special device that automatically reduces the working pressure of the pipeline. It can reduce the higher liquid pressure in the pipeline before the valve to the level required by the pipeline behind the valve. There are many types of air pressure reducing valves. The structure can be divided into membrane type, spring membrane type, piston type, lever type and bellows type. According to the number of valve seats, it can be artificially single-seat and double-seat. According to the position of the valve disc, it can be divided into positive-acting and counter-acting. According to the medium, it can be divided into nitrogen pressure reducing valve, hydrogen pressure reducing valve, oxygen pressure reducing valve, etc. .

The basic working principle of the air pressure reducing valve is to reduce the water pressure by the local resistance of the flow passage in the valve to the water flow. The range of the water pressure drop is automatically adjusted by the diaphragm connecting the valve disc or the water pressure difference between the inlet and outlet on both sides of the piston, and the pressure is reduced by a fixed ratio. The principle is to use the water pressure ratio control of the floating piston in the valve body. The pressure reduction ratio at the inlet and outlet is inversely proportional to the piston area ratio at the inlet and outlet. This kind of pressure reducing valve works smoothly and without vibration, which further improves the domestic pressure reducing valve production technology.

The implementation standard of air pressure reducing valve is based on JB/T2205-2000 "Structural Length of Pressure Reducing Valve". At present, most domestic manufacturers of pressure reducing valve design and produce according to this standard, but this standard is not perfect. The specifications are not complete. According to the specifications of the pressure reducing valve produced by the manufacturer and the information available, the connection size of each manufacturer is not uniform. It is recommended that the design institute and users choose according to the standard, and the pressure reducing valve manufacturer designs and manufactures according to the standard.

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