Pneumatic ball valve was evolved from the plug. It has the same movement rotated 90 degrees, is the cock body is different sphere, there are circular holes or channels through its axis. Just use the pneumatic ball valve pneumatic actuator gas source is rotated 90 degrees Used for the operation and a small torque can be closed tightly. The body cavity of full equality for the media to provide a little resistance, through the flow channel. /showroom/Pneumatic-Ball-Valve.htm

Pneumatic ball valve works by rotating the valve spool to flow or occlusion. Pneumatic ball valve switch light, small size, can be made into a large-caliber, reliable sealing, simple structure, easy maintenance, regular spherical surface and seal in the closed state, not pneumatic valve http://taiyivalve.51orders.com/Products_5414/Pneumatic-Ball-Valve.html
Susceptible to media erosion, in the various sectors has been widely used.