Pneumatic ball valve according to the classification of structure form 3)

the floating ball pneumatic valve
float pneumatic valve is under pressure from the middle, produce the ball to a certain extent and the displacement in the outlet seal face, pressing, to ensure the seal.
float pneumatic valve has simple structure, good sealing, but the ball all the workload of media through the exit ring, therefore should consider to seal material can withstand sphere medium work load. This kind of structure, which are widely used in low pressure pneumatic valves. Second,

fixed pneumatic ball valve pneumatic ball valve is fixed, does not produce any pressure. Pneumatic valve pneumatic valve seat is fixed and floating ball, the medium pressure, pneumatic valve seat, make the sealing pressure on the ball, to ensure the seal. Normally when a ball, the shaft with bearings, operating torque, suitable for high pressure and large diameter of the use of pneumatic valves.
in order to reduce torque and increase the reliability of the operation of pneumatic valve sealing, pneumatic valve seal appeared in recent years, whether in a betting special lubricating oil on sealing surface, to form a thin film, thus improve the sealing layer and reduce operating torque, more suitable for large diameter high pressure pneumatic valves.
third, elastic ball pneumatic valve
pneumatic valve is flexible. Sphere and pneumatic seat ring is the metal material, sealing pressure, relying on the pressure of the medium itself can not meet the sealing requirements, imposed by external forces. The pneumatic valve for high temperature and high pressure medium.
elastic sphere is at the end of an open and flexible wall tank area, and flexibility. When close the channel, and open the dry bulb and pneumatic seat wedge pressure sealing head. To wedge-shaped released before the ball, the ball back the original prototype, sphere and pneumatic seat, small gap between the sealing surface can reduce the friction and operating torque. The location of the
the ball can be divided into the direct way of according to oneself, sanhe right Angle. Sanhe right Angle for distributing media pneumatic ball valve and change the flow of the medium.
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