a) Cut off: cut off the medium in the pipeline. Such as: gate valve, globe valve, ball valve, plug valve, butterfly valve, etc. b) Non-return function: to prevent the medium from flowing back. Such as: check valve
c) For regulation: to regulate pressure and flow. Such as: 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 valve, three-way or four-way ball valve, plug valve, etc.
e) For safety: used for overpressure safety protection. Such as: safety valve, overflow valve.
f) Other special purposes such as steam traps, air traps, drain valves, vent valves, breathing valves, slag discharge valves, temperature control valves, etc.
1.2 According to the driving form
a) Automatic valve: act on the ability of the medium itself.
b) Drive valve: including manual, electric, pneumatic, hydraulic, etc.