The type of valve

According to use and function classification: Shut-off valve: mainly used to cut off or connect the media flow. Including gate valve, globe valve, diaphragm valve, ball valve, plug valve, butterfly valve, plunger valve, ball valve, needle valve and so on. Regulating valves: mainly used for regulating the flow of media, pressure and so on. Including the control valve, throttle, pressure reducing valve. Check valve: used to prevent media backflow. Includes various configurations of check valves. Diverter valves: used to separate, distribute or mix media. Including a variety of distribution valves and traps and other structures. Safety valves: for overpressure protection of the medium. Including various types of safety valve. According to the main parameters of classification: (A) by the pressure classification Vacuum valve: working pressure is lower than the standard atmospheric pressure valve. Low pressure valve: Nominal pressure PN less than 1.6MPa valve. Medium pressure valve: Nominal pressure PN 2.5 ~ 6.4MPa valve. High pressure valve: Nominal pressure PN10.0 ~ 80.0MPa valve. Ultra-high pressure valve: Nominal pressure PN greater than 100MPa valve. (B) by the temperature of the medium temperature valve: t greater than 450C valve. Medium temperature: 120 C less than t less than 450 C valve. Room temperature valve: -40 C less than t less than 120 C valve. Cryogenic valve: -100 C less than t less than -40 C valve. Cryogenic valve: t less than -100 C valve. (C) by the valve body material classification Non-metallic materials valves: such as ceramic valves, glass steel valves, plastic valves. Metal Materials Valves: such as copper alloy valves, aluminum valves, lead alloy valves, titanium valves, Monel valves, cast iron valves, carbon steel valves, cast steel valves, low alloy steel valves, high alloy steel valves. Metal body lining valves: such as lead-lined valves, lined plastic valves, lined enamel valves. General taxonomy: This taxonomy not only according to the principle, role and structure, is currently the most commonly used international and domestic classification methods. General sub-gate valve, globe valve, throttle valve, instrument valve, plunger valve, diaphragm valve, plug valve, ball valve, butterfly valve, check valve, pressure reducing valve, safety valve, steam trap, regulating valve, bottom valve, filter , Sewage valve and so on.