Plug valve, the opening and closing parts (plug or ball) is around its center line rotation, plug valve is a kind of valve with a through hole plug body as the opening and closing parts, through the rotation of the plug body and the valve stem to come true the opening and closing action . Plug valve’s structure is simple, and can open and close quickly, and the fluid resistance is small, in recent years as one of the earliest valves used by people in history, not only has not been replaced by ball valves and other types of valves, but the market has been becoming more and more popular.

Advantages:

1. The inlet and outlet of valve body is designed as a double groove sealing ring structure. In the process of rotation of the cock, the sealing specific pressure between the sealing pairs is gradually changing, until it reaches the fully open or fully closed , enough sealing specific pressure is generated, and the sealing pair reaches zero leakage.

2. The double groove sealing ring can make PTFE bushing stable in the valve body without displacement, and can absorb the micro deformation caused by the change in temperature of the bushing, at the same time the bushing and the cock produce a powerful wipe action, which improves the service life of the sealing surface.

3. The whole sealing process can be approximately considered independent of the pressure in the pipeline.

4. In PTFE liner, according to the use of temperature and working medium and different materials filling can lead to good lubrication, long life using.