Pneumatic valve is coupled with the pneumatic valve actuators. Execution speed pneumatic actuator relatively paute law valve # $ faster, fastest switching speed 0.05 seconds / times, so often called pneumatic quick disconnect valve. Pneumatic valve is usually equipped with various accessories, such as solenoid valves, air preparation triple pieces, limit switches, positioners, control boxes, etc., to achieve local control and remote centralized control, in the control room can control the switching valve no need to go on-site or bring dangerously high altitude and manual control, largely saves time and human resources and security. Pneumatic valve works by a rotating spool to the valve flow or occlusion. Pneumatic Valve switch light, small size, can be made into a large caliber, reliable sealing, simple structure, easy maintenance, with the spherical sealing surface often in the closed state, not easily be eroded media, in various sectors has been widely used. Pneumatic valve and plug valves belong to the same type of valve, only its closure member is a sphere, the sphere rotating around the center line the body achieve open and close a valve. Pneumatic valve in the pipeline is mainly used for cutting speed, distribution and change the direction of media flow. Pneumatic ball valve is a new type of valve, which has the following advantages: 1. Fluid resistance, the pipe resistance coefficient equal to the same length. 2. Simple structure, small size and light weight. 3. Close and reliable valve sealing surface material widely used plastic, sealing, and has also been widely used in the vacuum system. 4. Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation 90 °, to facilitate remote control. 5. Easy maintenance, simple pneumatic ball valve, seals are generally activities, the removal replacement is more convenient. 6. In the fully open or fully closed, sealing surface and the dielectric isolation ball and seat, through the media, will not cause erosion of the valve sealing surface. 7. Wide range of applications, from small to a few millimeters in diameter, large meters, from high vacuum to high pressure can be applied. 8. Because the pneumatic valve power source used is a gas, usually 0.2-0.8MPa pressure, relatively safe. Pneumatic valve if the leak, then the relative hydraulic, electric, the gas can be discharged directly to the environment is no pollution, but also has high security. 9. The turbine is rotated relative to the hand and ball, the pneumatic valve can be large diameter configuration (manual and turbine rotary valve are generally at DN300 caliber or less, pneumatic valve can reach DN1200 caliber.) Pneumatic valve has been widely used in petroleum, chemical, Each sector power generation, paper, atomic energy, aviation, rockets, as well as people's daily lives.