This kind of classification method according to the principle, function and according to the structure division, is the current international and domestic the most commonly used classification method. General points gate valve, cut-off valve, throttle valve, instrument valve, plunger valve, diaphragm valve, plug valve, ball valve, butterfly valve, check valve, relief valve, safety valve, drain valve, regulating valve, bottom valve, filter, drain valve etc. According to the purpose and function of classification

Regulating valve class - is mainly used for regulating the flow of medium, pressure, etc. Including the regulating valve, throttle valve, relief valve, etc.
The check valve class - used to prevent backflow medium. Including all kinds of structure of check valve.
Diverter valve type, distribution, or mixed media - used to separation. Including all kinds of structure of distributing valve and steam trap.
The relief valve class -- the safety of the overpressure protection for medium. Including all types of safety valve.
Block valves - is mainly used to truncate or flow through media. Include gate valves, globe valves, diaphragm valves, ball valves, plug valves, butterfly valves, plunger valve, ball valve, needle type instrument valve, etc.

According to the classification of pressure

Vacuum valve, pressure is lower than the standard atmospheric pressure of the valve.
Low pressure valve, nominal pressure valve of PN is less than 1.6 MPa.
Medium pressure valve, nominal pressure valve PN 2.5 6.4 MPa.
High pressure valve, nominal pressure PN10.0-80.0 MPa.
Super high pressure valve, nominal pressure valve of PN is greater than 100 mpa.

According to the classification of medium temperature

High temperature valve - t greater than 450 ℃..
Valve in temperature to 120 ℃ is less than t less than 450 ℃.
Room temperature valve - 40 ℃ less than valve of t is less than 120 ℃.
Cryogenic valves - less than to 40 ℃ 100 ℃ is less than t valve.
Cryogenic valves - t - less than 100 ℃.

According to the valve body material classification

Metal body lining valves - : lead-lined, lining plastic valves, valve lining enamel valve.
Nonmetallic material valve, such as: ceramic valves, glass fiber reinforced plastic valves, plastic valves
Metal material valve, such as: copper alloy, aluminum alloy, lead alloy, titanium alloy valve valve valve valve, monel alloy valve, cast iron, carbon steel, low alloy steel valves, cast steel valve valve valve, high alloy steel valves.