Block valves are mainly used to block or connect the medium flow, which includes gate valves, globe valves, diaphragm valves, ball valves, plug valves, butterfly valves, plunger valves and ball plug valves. Regulating valves are mainly used to regulate the flow and pressure of the medium, which include regulating valves, throttle valves and reducing valves. Check valves are used to prevent backflows of media. Check valves have various structures. Diverter valves are used to separate, distribute or mix media, which include distribution valves and drain valves with various structures. Safety valves are used for safety protection in case of medium overpressure, and safety valves have various types.
Classification by main parameters
Classification by pressure
The vacuum valve is a valve whose working pressure is lower than the standard atmospheric pressure.
The nominal pressure of low pressure valves is less than 1.6Mpa.
The nominal pressure of media pressure valves is from 2.5 to 6.4Mpa.
The nominal pressure of high pressure valves is from 10.0 to 80.0mpa.
The nominal pressure of ultra high pressure valves is greater than 100MPa.
Classification by valve body materials
Valves made from non metallic materials: ceramic valves, FRP valves, plastic valves, etc.
Valves made from metal valves: copper alloy valves, aluminum alloy valves, lead alloy valves, titanium alloy valves, monel alloy valves, cast iron valves, carbon steel valves, cast steel valves, low alloy steel valves, high alloy steel valves, etc.
Metal body lined valves: lead lined valves, plastic lined valves and enamel lined valves.
General classification
This classification method is divided according to the principle, function and structure. It is the most commonly used classification method at home and abroad. The valve is generally divided into the following valves: gate valves, globe valves, throttle valves, instrument valves, plunger valves, diaphragm valves, plug valves, ball valves, butterfly valves, check valves, relief valve safety valves, drain valves, regulating valves, bottom valves, filters, drain valves, etc.
Classification by main parameters
Classification by pressure
The vacuum valve is a valve whose working pressure is lower than the standard atmospheric pressure.
The nominal pressure of low pressure valves is less than 1.6Mpa.
The nominal pressure of media pressure valves is from 2.5 to 6.4Mpa.
The nominal pressure of high pressure valves is from 10.0 to 80.0mpa.
The nominal pressure of ultra high pressure valves is greater than 100MPa.
Classification by valve body materials
Valves made from non metallic materials: ceramic valves, FRP valves, plastic valves, etc.
Valves made from metal valves: copper alloy valves, aluminum alloy valves, lead alloy valves, titanium alloy valves, monel alloy valves, cast iron valves, carbon steel valves, cast steel valves, low alloy steel valves, high alloy steel valves, etc.
Metal body lined valves: lead lined valves, plastic lined valves and enamel lined valves.
General classification
This classification method is divided according to the principle, function and structure. It is the most commonly used classification method at home and abroad. The valve is generally divided into the following valves: gate valves, globe valves, throttle valves, instrument valves, plunger valves, diaphragm valves, plug valves, ball valves, butterfly valves, check valves, relief valve safety valves, drain valves, regulating valves, bottom valves, filters, drain valves, etc.
Next: Features, Types and Structures of Gate Valves
Previous: Notes for Quick Installation of Ball Valves
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