Valve classification methods are: valve general classification, according to the pressure classification, according to the media temperature classification, according to the valve body material classification four. General taxonomy This taxonomy not only by principle, role and structure by the division, is currently the most common international and domestic classification methods. General sub-gate valves, globe valves, throttle valves, instrumentation valves, plunger valves, diaphragm valves, plug valves, ball valves, butterfly valves, check valves, pressure relief valve safety valve, Sewage valve and so on. According to the purpose and role of classification Regulating valves - mainly used to regulate 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 protection against overpressure of the medium. Including various types of safety valve. Shut-off valves - Mainly used to shut off or switch on the medium flow. Including gate valve, globe valve, diaphragm valve, ball valve, plug valve, butterfly valve, plunger valve, ball valve, needle valve and so on. Pressure classification vacuum valve - the 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 PN2.5-6.4MPa valve. High pressure valve - Nominal pressure PN10.0-80.0MPa valve. High pressure valve - Nominal pressure PN greater than 100MPa valve. According to the temperature of the medium temperature classification valve - t greater than 450 ℃ valve. . Temperature valve -120 ℃ less than t less than 450 ℃ valve. Room temperature valve - 40 ℃ less than t less than 120 ℃ valve. Cryogenic valve - 100 ℃ less than t less than -40 ℃ valve. Cryogenic valve - t less than -100 ℃ valve. According to the body material classification Metal body lining valve -: lined lead valve, lined plastic valve, lined enamel valve. Non-metallic material valves - such as: ceramic valves, fiberglass valves, plastic valves Metal material 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.
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