Plug Valve, also named as Cock Valve, is one type of Closing or Plug Type that by rotation of 90 Degree to make the Passage of Plug and Valve Body to be the same or divided to realize its on/off functions. The Plug can be Cylinder or Taper Type.
The plug valve is the one that takes the cock body with hole as the start and stop part, and realized the start and stop function by the cock and valve stem. During the revolve procedure, the sealing specific pressure in the vice - sealing room of the cock is changing until it get to the full - open or close position.
The dual - glove sealing ring can not only fix the PTFE bush in the body or shift, but also absorb the micro - distortion of the cutting sleeve which resulted from the temperature changes.
The entry and exit of the body design is dual - glove sealing structure. Produce enough sealing specific pressure and zero - leakage. There is strong rubbing function that can import the service life of the sealing face between the cutting sleeve and the cock
The upper end of the cock shift make up of the PTFE film, O - ring and the washer, which can regulate the sealing specific pressure between the sealing faces to make the cock moving nimbly as well as ensure the seal of the connection between the entry and exit ends of the flange. In the PTFE cutting sleeve, use the filler based on the operation temperature and working medium that is well lubricated with long life.
All of our Plug Valves are designed, manufactured and tested to API, ASTM, ANSI, JIS, DIN and BS Standards.