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1 O-ring in stem for better sealing

  When turning,O ring can decrease the direct friction.When in low pressure, it can act as assistant sealing role for stem. O-ring is better than PTFE for gas medium.

2 Anti-blow out stem 

  It can solve the blow out problem caused by high pressure.

3 Sealing between body and cover

  A concentric circle positioning sealing structure between body and cover,can prevent surplus material leaking or moving caused by pressing. 

4 ISO5211 High platform

  ISO5211 High platform can be installed by various driver. There are 2 group of PCD for customers to choose.

5 Sinking cover tighting design

  User can tighten Nut A and Nut B to prevent leak between stem and body, no need to unload driver, conveniently.

6 Pre-tighten 2 butterfly washer can play the role of spring, tighten filling again.

7 Spring can push the anti-static steel ball, make it to contact valve ball tank, so it can conduct the static.

8 Fire proof design

  When fire occur,seat is burnt down or vapoured, auxiliary metal valve seat can seal.