Pneumatic ball valve.

1. The thrust bearing reduces the friction torque of the valve stem, allowing the valve stem to operate stably and flexibly for a long time.
2. Anti-static function: A spring is installed between the ball, valve stem and valve body, which can discharge the static electricity generated during the switching process.
3. Since materials such as polytetrafluoroethylene have good self-lubricating properties and have small friction losses with the ball, the pneumatic ball valve has a long service life.
4. Small fluid resistance: Pneumatic ball valves have the smallest fluid resistance among all valve categories. Even if they are reduced-diameter pneumatic ball valves, their fluid resistance is quite small.
5. The valve stem seal is reliable: Since the valve stem only rotates and does not move up and down, the packing seal of the valve stem is not easily damaged, and the sealing capacity increases with the increase of the medium pressure.
6. The valve seat has good sealing performance: the sealing ring made of elastic materials such as polytetrafluoroethylene is easy to seal, and the valve sealing capacity of the pneumatic ball valve increases as the medium pressure increases.
7. The fluid resistance is small, and the full-diameter ball valve has basically no flow resistance.
8. Simple structure, small size and light weight.

9. Tight and reliable. It has two sealing surfaces, and the sealing surface materials of the ball valve are widely used in various plastics, with good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.
10. Easy to operate, quick to open and close, just rotate 90° from fully open to fully closed, convenient for long-distance control.
11. It is easy to maintain. The ball valve has a simple structure and the sealing rings are generally movable, making it easy to disassemble and replace.
12. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes, it will not cause erosion of the valve sealing surface.
13. It has a wide range of applications, with diameters ranging from a few millimeters to several meters, and can be applied from high vacuum to high pressure.
14. Since the ball valve has wiping properties during the opening and closing process, it can be used in media with suspended solid particles.
15. The processing precision is high, the cost is expensive, and it is not suitable to be used in high temperatures. If there are impurities in the pipeline, it is easy to be blocked by the impurities, causing the valve to be unable to open.