a) Cut off: Cut off the medium in the pipeline. For example, gate valves, globe valves, ball valves, plug valves, butterfly valves, etc. b) Check valves: used to prevent medium backflow. For example: check valve
c) Adjustment: Adjust pressure and flow rate. For example: regulating valve, pressure reducing valve, throttle valve, butterfly valve, V-shaped opening ball valve, balance valve, etc
d) Distribution is used to change the flow direction of the medium in the pipeline and distribute the medium. Such as distribution valves, three-way or four-way ball valves, plug valves, etc
e) Safe use: Used for overpressure safety protection. For example: safety valve, overflow valve.
f) Other special purposes such as steam trap, air trap, drain valve, vent valve, breathing valve, slag discharge valve, temperature regulating valve, etc.
1.2 Divided by driving form
a) Automatic valve: operates based on the ability of the medium itself.
b) Drive valves: including manual, electric, pneumatic, hydraulic, etc