The ball of pneumatic ball valve is elastic. Ball and seat sealing ring are made of metal material, sealing pressure is very big, depending on the pressure of the medium itself has not reached the sealing requirements, must be applied external force. This valve is suitable for high temperature and high pressure media.

The elastic sphere is obtained by opening an elastic groove at the bottom of the inner wall of the sphere. When closing the channel, use the wedge head of the stem to inflate the ball and press the seat to seal. Release the wedge head before turning the ball, and the ball will return to its original shape, resulting in a small gap between the ball and the seat, which can reduce the friction and operating torque on the sealing surface.

Pneumatic ball valve according to its channel position can be divided into straight through type, three through type and rectangular type. The latter two ball valves are used to distribute the medium and change the flow direction of the medium.