A floating pneumatic valve pneumatic valve ball floating under the pressure of medium, the ball can produce some displacement and pressure at the outlet, ensure that seal the outlet seal face. Floating ball valve pneumatic has simple structure, good sealing, but the ball all work under medium load to the export sealing ring, so consider seal material to withstand the scope of work. This structure is widely used in low pressure valve. Second, the fixed ball ball valve pneumatic pneumatic ball valve is fixed, does not produce mobile after compression. Fixed ball valve with a floating seat, pressure from the media, mobile seat, seal was described in the ball, in order to guarantee the seal. Generally a ball, and the lower bearing shaft, small operation torque, suitable for high pressure and large diameter valves. In order to reduce the pneumatic valve operating torque and increase the reliability of the seal, valve seal has emerged in recent years, between the sealing surface pressure of special type of grease injection, to form a layer of thin film, it enhances the seal, but also reduces the operation torque, more suitable for large diameter high pressure ball Industrial Valves. Three, elastic pneumatic ball valve pneumatic flanged ball valves is elastic. Ball and seat sealing adopts metal materials, sealing pressure is very big, to rely on itself has reached below the specification of the pressure seal must exert external force in the media. This valve is suitable for medium in high temperature and high pressure. Elastic ball is in a elastic sphere open channel, and access to the lower end of the flexibility of the lining. When close the channel, and the ball seat sealing wedge head stems. Rotating ball release wedge entered, then restore the original prototype, make the small gap, can reduce the friction between the ball and seat sealing surface and the operating torque. Pneumatic valve position can be according to your own channel straight through, classify three-pass and right Angle. Two kinds of ball valves for distribution after the medium and change the flow of medium.
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