Pneumatic ball valve was evolved from the plug. It has the same movementrotated 90 degrees, is the cock body is different sphere, there are circularholes or channels through its axis. Just use the pneumatic ball valve pneumatic actuator gas source is rotated90 degrees Used for the operation and a small torque can be closed tightly. Thebody cavity of full equality for the media to provide a little resistance,through the flow channel. http://www.51orders.com/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 surfaceand seal in the closed state, not pneumatic valve http://taiyivalve.51orders.com/Products_5414/Pneumatic-Ball-Valve.html
Susceptibleto media erosion, in the various sectors has been widely used.