First, the characteristics of the plunger cut-off valve: Plunger cut-off valve structure is simple and scientific, safe and reliable, particularly easy to open and close flexible, easy to operate compared with the plunger valve opening and closing light, fast and so on. The sealing performance of a unique leak-free, piston with a metal and non-metallic multi-layer sealing structure composed of double-effect function. Integral seat (liner) radial tapered sealing surface, high height, large contact area, good performance. Piston ring according to the different media of choice of materials can fully improve its scope of use, high temperature, wear resistance, corrosion resistance, resilience, etc., after a long period of use, if the piston ring wear and tear can be increased when the pressure regulator Original state. Plunger stop valve repair replacement piston ring technology is simple and convenient, the valve body is not required to detach the pipe after stopping the steam valve cover assembly can replace the replacement of the new piston ring repetitive use. Second, the structure of the plunger valve performance and principle: The plunger valve consists of the valve body, valve cover, gland, valve stem, valve plug, valve plug cover, piston ring, integral cylinder (valve seat) Flat bearings, handwheels, bevel gears and other components, due to the rotation of the wheel-driven piston rod so that the cone between the inside and outside the cylinder up and down reciprocating motion to complete its closure and opening. Plunger block valve cylinder liner cone structure in the cylinder liner (seat) cone round according to the applicable medium were welded stainless steel alloy or carbide, surfacing layer hardness up to HRC40, boring and grinding . Sealing structure of the valve plug and piston ring with a multi-layer metal and non-metallic seal composition, when a piston ring wear and tear in the long-term use of the operation has been adjusted to zero pressure regulator has failed, so the second metal cutoff Taper piston at the same time plays the role of sealing, so the life of the plunger stop valve up to several times the normal valve, so the use of the process without special maintenance and does not leak, to achieve a better open leak-proof pipe The choice of device has the obvious application to save energy and reduce labor and environmental pollution.
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