The purpose of the pneumatic valve and characteristics

Pneumatic valve is a type of valve is widely used in industrial field. Here introduces some of its purposes and characteristics. The working principle of pneumatic valve is to rely on rotary valve core to keep the valve open or occlusion. 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. Pneumatic valve is a new type of valve, it has the following advantages:. Fluid resistance is small, its resistance coefficient with section of equal length. 。 Simple structure, small volume, light weight. 。 Close and reliable, and 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 can achieve DN caliber. ） 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. Characteristics of the pneumatic valve with type O and V valves. O type valve adopts floating structure, core for precision casting, hard chromium plating processing, appearance with enhanced ptfe seat material, flow crossing the same as the pipe diameter, flow capacity, little flow resistance, closing without leakage, generally do switch valve is used, especially suitable for high viscosity; V type valve adopts fixed structure, core open v-shaped incision, which can realize shear fiber, granular media. Process equipment under different choice of pneumatic or electric actuators, respectively of pneumatic valve and electric valve, pneumatic valve such as must be regulated to achieve proportional distribution valve positioner electric valve, such as to be regulated to achieve proportional election electronic actuators or servo amplifier, etc.