Q641F, Q641Y type PN16 ~ PN63 pneumatic valve: Pneumatic, flanged, floating ball straight-form structure, seat sealing surface material is PTFE, PTFE reinforced plastic (Q641F), cobalt-based metal welding (Q641Y), nominal pressure PN16 ~ PN63, body material for WCB, CF8, CF8M, steel ball valve. Pneumatic valve evolution and the evolution of the working principle of pneumatic valve is evolved from the stopcock. It has the same 90 degrees rotation movement, except that the cock body is a sphere, a circular through-hole or channel through its axis. Sphere and the ratio of openings should be such that when the ball is rotated 90 degrees, in the import and export of office should be fully rendered sphere, thus cutting off the flow. This type valve installed anywhere in the pipeline can be. Works just use pneumatic valve pneumatic actuator with air rotated 90 degrees operation and a small torque can be closed tightly. The body cavity of full equality for the media provided little resistance, through the flow channel. Generally considered the most suitable valve opening and closing done directly used, but recent development has been designed to give it a throttle valve and flow control purposes. The main features of valve is its own compact, easy operation and maintenance for water, solvents, acids, and natural gas work in general media, but also for the poor working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve can be integral, or may be modular. Acting pneumatic valve pneumatic valve works by rotating the spool to the valve flow or occlusion. Pneumatic valve switch light, small size, can be made into large-caliber, reliable sealing, simple structure, easy maintenance, and spherical sealing surface often in the closed state, can not easily be eroded media, has been widely used in various industries. Pneumatic ball and plug valves belong to the same type, only its closure member is a sphere, the sphere rotating around the center line valve to achieve open, and close a valve. Advantages of pneumatic valve pneumatic valve in the pipeline is mainly used for cutting speed, distribution and change the direction of flow of the medium. Pneumatic valve is a new type of valve is widely used in recent years, it has the following advantages: 1. Fluid resistance, its drag coefficient with the same pipe lengths are equal. 2. Simple structure, small size and light weight. 3. Compact and reliable valve sealing surface material widely used plastic, sealing, 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 of 90 °, to facilitate remote control. 5. Easy maintenance, simple pneumatic valve structure, seals are generally activities, the removal replacement is more convenient. 6. When fully open or fully closed, the 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 diameter to a few millimeters to a few meters from high vacuum to high pressure can be applied. 8. Because pneumatic valve power source used is a gas, typically 0.2-0.8MPa pressure, relatively safe. Pneumatic valve leak if so, the relative hydraulic, electric, the gas can be discharged directly, no pollution to the environment, but also has high security. 9. relative to the manual valve and turbine rotation, the pneumatic valve can configure large diameter, (manual and turbo rotating valve DN300 caliber generally in the following, pneumatic valve can now reach DN1200 caliber.) Pneumatic valve has been widely used in petroleum, chemical departments power generation, paper, nuclear, aviation, rockets, as well as people's daily life. Pneumatic valve form of the structure can be divided into: a floating ball valve pneumatic valve pneumatic ball is floating in the medium under pressure, the ball can produce a certain displacement and pressed in the sealing surface of the outlet end, ensure the outlet end seal. Floating ball valve pneumatic simple structure, good sealing, but the ball all bear the load of the working medium to pass the exit ring, so to consider the ring material can withstand the work load of the media sphere. This structure is widely used in low-pressure valve. Second, the fixed ball pneumatic valve pneumatic ball valve is fixed, no movement after compression. All with a floating ball valve fixed valve seat, by medium pressure, the valve seat to move, so that the ball seals pressed on, in order to ensure the seal. Usually with the ball, the lower shaft with bearings, operating torque, suitable for high pressure and large diameter valves. To reduce the pneumatic valve operating torque and increase the reliability of the seals, valve seals has emerged in recent years, both the pressure injection of a special lubricant between the sealing surface to form a layer of film that enhances the seal, but also reduce operating of torque, more suitable for large diameter high pressure valve. Third, the elastic ball pneumatic valve pneumatic ball valve is resilient. Ball and seat ring are made of metal materials, sealing pressure than large, rely on the media itself has reached less pressure sealing requirements, must apply force. This valve is suitable for high temperature and high pressure medium. Elastic sphere is the sphere of the inner wall at the lower end of a resilient open slot, and access flexibility. When closing the channel, with the stem of the wedge-shaped head on and make the ball up the valve seat seal. Before turning the ball to loosen the wedge-shaped head, the ball along with restoration of the original prototype, so that small gap, sealing surface can reduce friction and operating torque between the ball and seat. Pneumatic valve position can be divided according to their straight-channel, three-way and the right angle. After two ball valves for distribution media and change the flow of the medium.