Stainless steel pneumatic ball valve structure can be divided into: a floating pneumatic V type ball valve stainless steel spheres of pneumatic ball is floating in the medium pressure, the sphere can produce a certain displacement and pressed onto the sealing surface of the export side,to ensure that the Sealing. Floating pneumatic V type ball valve is a simple structure, good seal, but the sphere to work under medium load all passed the export seals, to consider the ring material can withstand the work load of the sphere medium. This structure is widely used in low-pressure ball valve. Second, the sphere of the fixed ball pneumatic valve stainless steel pneumatic ball is fixed, compression does not produce . Fixed ball valve with a floating valve seat, by the media pressure, the valve seat to move, and seals pressed on the ball, in order to ensure sealing. Usually in with the ball in the upper and lower shaft fitted with bearings, operating torque, suitable for high pressure and large diameter valves. Valve seals in order to reduce the operating torque of the pneumatic ball and increase the reliability of the seal, in recent years, both in pressure between the sealing surface of the note a special lubricant, to form an oil layer, which enhances the sealing, reduce the operating torque, more suitable for high pressure large diameter ball valves. The ball valve of elastic ball pneumatic valve pneumatic flexible. Ball and the valve seat ring made ??of metallic materials, sealing pressure greatly rely on the pressure of the medium itself has reached less than sealing requirements, you must apply force. This valve is applicable to high temperature and pressure medium. Elastic sphere is the bottom of the sphere wall to open a flexible tank, to obtain flexibility. When the channel is closed, the wedge-shaped head of the stem so that the sphere up on compression to seal with the valve seat. To release the wedge-shaped head before rotating sphere, the sphere followed by restoration of the original prototype, a small gap between the ball and valve seat sealing surface can reduce the friction and operating torque. Pneumatic V type ball valve according to the channel positions can be divided into straight-through, tee and rectangular type. The latter two ball valves for the distribution media and change the flow of media.

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