According to the role of instrumentation valves do not have, can be divided into the following categories instrument valves: According to the use can be divided into: cut-off valve, check valve, safety valve, regulating valve, diverter valve. According to its different nominal pressure in use can be divided into: vacuum valve, low pressure valve, medium pressure valve, high pressure valve, high pressure valve. According to the normal use of the working temperature classification can be divided into: ultra-low temperature valve, cryogenic valve, room temperature valve, temperature valve, high temperature valve. According to different braking methods can be divided into: automatic valve, automatic valve is divided into (safety valve, pressure reducing valve, steam trap, check valve, automatic control valve); drive valve, drive valve can also be based on different power source Divided into (electric valve, pneumatic valve, hydraulic valve, pneumatic valve, electric valve), manual valve. According to the size of the fluid through the instrument valve diameter can be divided into: small diameter instrument valve, instrument diameter valve, large diameter instrument valve, large diameter instrument valve. According to the structure of the instrument valve can be divided into different shapes: cut-off-shaped, plug-shaped, plug valves, screw-on valve, butterfly line, slide valve line. In accordance with the meter valve and other connections of different ways can be divided into: thread connection instrument valve, flange connection instrument valve, welding connection instrument valve, clamp connection meter valve, card set connection meter valve, meter connection meter valve. According to the materials used to manufacture instrumentation valves are divided into; metal materials, instrument valves, non-metallic materials, instrument valves, metal valve body lining valve. Instrument valve model too many types may have other kinds of classification, but after all, is still suitable for industrial pipe gate valve, throttle, ball valve, butterfly valve, diaphragm valve, plunger valve, plug valve, check valve, safety valve , Pressure reducing valve, steam trap and so on.
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