Plunger valve

Structure and Characteristics

A plunger valve is composed of valve body, valve cover, valve stem, plunger, hole holder, sealing ring, handwheel and other parts (as shown in the figure). When the handwheel rotates, the valve body drives the plunger to reciprocate up and down in the middle of the hole frame to complete the opening and closing function of the valve.
In the valve, an interference fit is used between the plunger and the sealing ring. By adjusting the flange bolts in the pressure cover, the lateral force generated by the compression of the sealing ring is sealed with the hole surface in the valve body and the outer circle of the plunger, thereby ensuring sealing and preventing internal leakage. At the same time, the valve opening torque is small, which can achieve rapid opening and closing of the valve.
Due to the use of non-toxic new sealing materials with strong resilience and high wear resistance in the sealing ring, it can withstand long-term high temperature and high pressure without losing elasticity, making the sealing performance reliable and durable.

Installation and maintenance

1. The plunger valves produced by our company are tested and accepted according to ZBJ16006 before leaving the factory. When in use, only the exterior and cavity need to be cleaned, and there is no need to disassemble, wash or replace them.
2. This plunger valve can be installed at any position, and the direction of medium flow is indicated by the arrow on the valve body.
3. After a period of use, if there is wear and leakage on the sealing ring, the valve must be closed first, and then the middle flange bolts should be evenly tightened slightly until leakage occurs. During simultaneous replacement, precautions should be taken to prevent cracks and damage to the plunger and newly installed sealing ring.
4. In pipelines with large temperature differences between hot and cold alternation in a short period of time, plunger valves cannot be used.