Pneumatic Operated Full Port 3pcs Ball Valve

      Pneumatic ball valve is a ball valve with a pneumatic actuator. The execution speed of the pneumatic actuator is relatively fast, and the fastest switching speed is 0.05 seconds/time, so it is usually called the pneumatic fast cutting ball valve. Pneumatic ball valve is usually configured with a variety of accessories, such as solenoid valve, air source processing triplet, limit switch, position, control box, etc., to achieve local control and remote centralized control, in the control room can control the valve switch, do not need to go to the scene or high altitude and dangerous to bring manual control, to a large extent, saving human resources and time, improve safety. Pneumatic ball valves are classified according to material: stainless steel pneumatic ball valves, plastic pneumatic ball valves, carbon steel pneumatic ball valves, cast iron pneumatic ball valves and so on. According to the number of classification of two pneumatic ball valves, three pneumatic ball valves, four pneumatic ball valves.

Pneumatic ball valve:

（一)Floating pneumatic ball valve

      The ball of the pneumatic ball valve is floating, and under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure that the outlet end is sealed.

（二)Fixed ball pneumatic ball valve

      The ball of the pneumatic ball valve is fixed and does not move after pressure. Fixed ball valves are equipped with floating seat, under the pressure of the medium, the seat is moved, so that the sealing ring is firmly pressed on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the ball, and the operation torque is small, suitable for high pressure and large diameter valves.

（三）Elastic ball pneumatic ball valve

      An elastic sphere is an elastic groove opened at the lower end of the inner wall of the sphere to obtain elasticity. When the channel is closed, use the wedge head of the stem to expand the ball and press the seat to seal. The wedge head is loosened before the ball is turned, and the ball is then restored to its original shape, so that there is a small gap between the ball and the seat, which can reduce the friction and operating torque of the sealing surface.

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