(1) Cut off: such as gate valves, globe valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, etc. Truncated type valve, also known as closed valves, globe valves, and its role is to connect or disconnect the line of media.
Check valve, check valve leakage, also known as one-way valve or check valve, the check valve is a kind of automatic valves, its role is to prevent the line of medium back, to prevent reverse pump and drive motor, and a container medium . Pump water off the end of the valve also belongs to check class.
Proof valves, valves and other accidents, the safety valve is to prevent the line or device medium pressure exceeds a predetermined value, so as to achieve security purposes.
Regulating valves, throttle valves and pressure relief valve, and its role is to regulate media pressure, flow and other parameters.
(2) Vacuum: such as vacuum valve, vacuum flapper valve, filling the vacuum valve and pneumatic vacuum valve. Its role is in the vacuum system, to change the air flow direction, adjust the size of the gas flow, or turn off the vacuum system components pipeline is called the vacuum valve.
(3) special purpose: such as pigging valve, vent valve, drain valve, exhaust valves, filters. Exhaust valve is an essential auxiliary piping system components, widely used in boilers, air conditioning, oil and gas, water supply and drainage canal. Often installed in the commanding heights or elbow, etc., exclude excess gas pipeline to improve the efficiency of management of road use and reduce energy consumption.