(1)Truncation type valve:gate valve,globe valve,plug valve,ball valve,butterfly valve,needle valve,diaphragm valve,etc.Truncation type valve is also called cut-off valve,stop valve,with the effect of cut-in or cut off the medium in pipe lines.

(2)Non-return type valve:check valve is also called one-way valve or cut-off valve,check valve belong to one automatic valve,used mainly for preventing medium in pipe lines blowing back,driving motor reversing,and medium in container leaking out.

(3)Security type valve:safety valve,explosion-proof valve,accidents valve,etc.Safety valve mainly used for preventing medium in pipe lines and container exceeding specified value,thus achieve the purpose of security and protection.

(4)Regulating valves:control valve,throttle valve and reducing valve,mainly for regulating pressure and capacity,etc.

(5)Shunt valve categories:distribution valve,three-way valve,and steam trap valve.Mainly used for distributing,separating or mixing the medium in pipe lines.

(6)Valve for special purposes:pigging valve,vent valve,blowdown valve,exhaust valve and strainer,etc.