The effect of pneumatic valves and USES classification

　 （ ） Truncation: such as brake pneumatic valve, pneumatic valve, the cut-off cock pneumatic valve, pneumatic ball valve, pneumatic valve, needle type pneumatic butterfly valve, pneumatic diaphragm valve, etc. Truncation type pneumatic valve, pneumatic valve, also known as closed circuit by the pneumatic valve, its role is connected or truncated medium pipeline.
　　( Check: such as check pneumatic valve, check valve pneumatic valve, also known as a one-way pneumatic valve, pneumatic valve and non-return check pneumatic valve belongs to a kind of automatic pneumatic valve, its role is to prevent the backflow medium pipeline, prevent the pump and drive motor reversal, and the container medium leakage. Pump suction off hand of pneumatic valve also belong to the check valve class.
　　( Security: such as pneumatic valve, pneumatic valve, explosion-proof safety accident pneumatic valve, etc. The role of the pneumatic valve is to prevent the pipeline safety or device in the medium pressure in excess of the prescribed, so as to achieve the purpose of security and protection.
　　( Regulation, such as regulating pneumatic valve, pneumatic valve and throttle pressure relief valve, its purpose is to adjust the parameters such as pressure, flow rate of medium.
　　( Shunt: such as distribution of pneumatic valve, pneumatic valve, tee hydrophobic pneumatic valve. Its role is assigned, separation or mixed medium pipeline.
　　( ） Special purpose: such as pigging pneumatic valve, object completely dynamic valve, pneumatic valve, pneumatic valve exhaust emission, filters, etc. Exhaust pneumatic valve in the pipe system is indispensable auxiliary components, are widely used in boiler, air conditioning, oil and gas, water supply and drainage pipeline. Often installed in the place such as the commanding heights or bend, get rid of extra gas pipeline, pipe road use efficiency and reduce energy consumption.