Pneumatic valve related introduction

The working principle of pneumatic valve is to rely on the valve stem rotary valve core to keep the valve open or closed. Pneumatic valve switch lightweight, small size, can make it big caliber, reliable sealing, simple structure, convenient maintenance, and facial sealing surface often in the closed state, not easily be medium erosion, has been widely used in various industries. Pneumatic valve and plug valve is belong to one type of valve, only its closure is the individual, body around the center line of the valve body rotation to achieve a kind of open and close the valve. Pneumatic valve in the pipeline is mainly used for cutting speed is quick, distribution, and change the flow direction of medium. Fluid resistance is small, its resistance coefficient with section of equal length. Simple structure, small volume, light weight. Close and reliable, and the valve sealing surface material widely used plastic, sealing good, also has been widely used in the vacuum system. Easy to operate, open and close quickly, from open to close as long as the rotating °, is advantageous for the remote control. The pneumatic valve has simple structure, convenient maintenance, sealing ring, which generally remove replacement is more convenient. In full open or full close, the body and seat sealing surface and the dielectric isolation, medium through, does not cause the valve sealing surface erosion. Applicability is wide and size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied. 。 Because of pneumatic valve is gas that is used by the power supply is commonly. - 。 MPa pressure, is relatively safe. Pneumatic valve if air leakage, the relative hydraulic, electric, gas can directly discharge, no pollution to the environment, and has higher security. 。 Compared with the manual and turbine valve, pneumatic valve can be large caliber configuration, ( Manual and turbine rotational valve is generally below DN caliber, pneumatic valve DN caliber can be achieved at present. ) Pneumatic valve has been widely used in petroleum, chemical, power, papermaking, atomic energy, aviation, rockets and other departments, as well as People's Daily life.