The pneumatic ball valve is evolved from the plug valve. It has the same rotation of 90 degrees, the difference is that the cock body is a sphere, a circular through hole or channel through its axis. The ratio of the spherical surface and the channel port should be such that when the ball is rotated 90 degrees, the inlet and outlet should be all spherical, thereby cutting off the flow. This kind of valve can be installed in any position in the pipeline.

Pneumatic ball valve only need to use the pneumatic actuator gas source rotation 90 degree of operation and a small torque can be closed tightly. Full equality of the inner cavity of the valve body to provide a very small resistance, through the flow channel. It is generally considered the most suitable for direct use, but the recent development has been designed so that it has a throttle and control flow. The main features of the valve itself is compact, easy operation and maintenance for water, solvents, acids, and natural gas general working media, but also applies to poor working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve can be a whole, but also can be a combination of.