Plunger valve works: When the hand wheel rotation, driven by the valve stem hole rack in the middle of the plunger up and down reciprocating movement to complete the valve opening and closing function. The plunger and the valve seal ring interference fit between the use, by adjusting the gland in the flange bolts, Cast Gate, Globe, Check Valvesthe seal ring compression of the lateral force generated in the hole with the valve sealing surface and the cylindrical plunger, Oil pumpsthereby ensuring the valve door seal and eliminate the internal and external leakage, and valve opening torque is small, to achieve the rapid opening and closing valve

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