Pneumatic ball valve is mainly used to cut, allocate and change the flow direction of the medium. Recently, pneumatic ball valve is a new kind valve used widely, which has the following advantages:
1. The fluid resistance is small and the resistance coefficient is the same to the pipe section with same length.
2. The structure is simple, with small volume and light weight.
3. Compact and reliable. At present, the material for sealing face of ball valve widely used plastic, with excellent leak tightness. Besides, it is widely used in vacuum system.
4. The operation is convenient with quick open and lockage. From full-open to full-lockage, it just needs to be rotated for 90°, which is convenient for remote control.
5. The maintenance is convenient. Pneumatic ball valve has simple structure, with moving seal ring and convenient disassembly and replacement.
6. In full-open or full-lockage, the seal face of sphere and valve seat is isolated from the medium. Thus, when the medium passes through, it won’t result in the erosion in the seal face of valve.
7. The scope of application is wide. The diameter is from millimeters to meters, which is applicable from high vacuum to high pressure.
Pneumatic ball valve has widely used in petroleum, chemical engineering, power generation, papermaking, atomic energy, aviation, rocket and other departments and daily life.