How do you use the plunger pneumatic valve? The working principle of pneumatic valve plunger?

piston pneumatic valve by the pneumatic valve, pneumatic valve cover, stem, plunger, the hole planes, sealing ring, hand wheel, etc. When the hand wheel rotation, through the pneumatic valve rod drives the plunger in the middle of the hole rack up and down reciprocating movement to complete the pneumatic valves open and close function. Between plunger and seal ring used in pneumatic valve interference fit, by adjusting the gland flange bolts, make the seal ring compression produced by the body in the hole surface and side force and pneumatic column circle seal, beyond the Great Wall so as to ensure the sealing of the pneumatic valve, put an end to the internal and external leakage, pneumatic valve small open torque, at the same time can realize the pneumatic valves open and close quickly.
plunger pneumatic valve is closed by a stainless steel plunger, up and down two elastic sealing ring and a metal frame, the plunger seal and seal closely cooperate to achieve, plunger in the two sealing ring, sealing area is greater than the average stop pneumatic valve; Switch pneumatic valve, plunger piston to move slowly in the sealing ring, interface is almost no wear and closed, under the plunger insert seal, truncation port; Open, plunger, though out of the sealing ring, but it is still hidden in the sealing ring, keep the isolation with the outside world, without leakage.
the plunger surface after high precision cylindrical grinding machine. Sealing ring with strong elasticity, high wear resistance of nontoxic new sealing material, so the sealing is reliable, durable. To improve the service life of the piston pneumatic valve.