Valve "valve" is defined in the fluid system, used to control the direction of the fluid, pressure, flow device. Valves are devices that allow the flow and stop of the media (liquid, gas, powder) in the piping and equipment and control the flow of the medium. With cut-off, regulation, diversion, to prevent the countercurrent, regulator, shunt or overflow pressure relief and other functions.Foundry Valve Manufacturers china-hijiazhuang Shenghua Group Co., Ltd.
Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201,304,316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard custom valve materials .
According to the nominal pressure classification:
(1) Vacuum valve: refers to the working pressure is lower than the standard atmospheric pressure valve.
(2) low pressure valve: refers to the nominal pressure PN ≤ 1.6Mpa valve.
(3) Medium pressure valve: refers to the nominal pressure PN 2.5, 4.0, 6.4Mpa valve.
(4) high-pressure valve: refers to the work pressure PN is 10 ~ 80Mpa valve.
(5) ultra-high pressure valve: refers to the nominal pressure PN ≥ 100Mpa valve.
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