In accordance with the valve's automatic and drive, use and function, technical parameters, structural features, structural principles of the valve classification.

First, automatic and drive classification

1 automatic valves rely on the medium (liquid, air, steam, etc.) and its own ability to act on the valve. Such as safety valve, check valve, pressure reducing valve, steam trap, solenoid valve, air trap, emergency shut-off valve and so on

2 "drive valve" with manual, power, hydraulic or pneumatic to control the valve, such as gate valve, globe valve, throttle valve, butterfly valve, ball valve, plug valve and so on

Two classification by purpose and function

1 "cut-off valve" is mainly used to cut off or to connect the pipe in the media flow. Such as globe valve, gate valve, ball valve, plug valve, butterfly valve, diaphragm valve and so on

2 "check valve" used to prevent backflow of media. Such as various structures of check valves

3 "regulating valve" is mainly used to regulate the medium pressure and flow in the pipeline. Such as control valve, throttle valve, pressure reducing valve, etc.

4 "diverter valve" is used to change the direction of the medium flow in the pipeline, from the role of distribution, diversion or mixed media. Such as the structure of the distribution valve, three or four plug, three or four ball valve, various types of traps and so on

5 "safety valve" for overpressure safety protection, discharge excess media, to prevent pressure exceeds the specified value. Such as various types of safety valves

6 "multipurpose valve" is used to replace two, three, or even more types of valves. Such as stop check valve, check valve, stop check valve, etc.

7 other special valves, such as drain valve, vent valve, coke valve, pigging valve, etc..