Water system pressure reducing valve

The principle of the pressure reducing valve is to reduce the water pressure by the local resistance of the flow passage in the valve, and the scope of the water pressure drop is automatically adjusted by the film connected to the valve disc or the inlet and outlet water pressure difference on both sides of the piston. In recent years, there have been some new pressure reducing valves, such as constant ratio pressure reducing valves. The principle of constant ratio decompression is to use the floating piston in the valve body of the water pressure ratio control, inlet and outlet end decompression ratio and inlet and outlet side piston area ratio is inversely proportional. This pressure reducing valve works smoothly without vibration; There is no spring in the valve body, so there is no spring corrosion, metal fatigue failure; Good sealing performance does not leak, so both reduce dynamic pressure (water flow) and static pressure (flow 0); Especially in the decompression at the same time does not affect the water flow.

Although the water flow through the pressure reducing valve has a large head loss, but because of reducing the waste of water and make the system flow distribution reasonable, improve the system layout and working conditions, so it is still energy-saving. Each spring of the pressure reducing valve is only applicable within a certain range of outlet pressure, and the spring should be replaced beyond the range. In the medium working temperature is relatively high occasions, generally choose the pilot piston pressure reducing valve or pilot bellows type pressure reducing valve. Medium for air or water (liquid) occasions, it is generally appropriate to choose direct action of membrane pressure reducing valve or pilot membrane pressure reducing valve. Medium for steam occasions, should choose the pilot piston type pressure reducing valve or pilot bellows type pressure reducing valve. For ease of operation, adjustment and maintenance, pressure relief valves should generally be installed in horizontal pipelines.