1. Double o-ring seals in stem area design to 

prevents leakage

2. Emergency sealant injection fitting design in stem

3. Blow-out proof stem

4. Emergency sealant injection fitting design in seat

5. Fire safe design

6. Double block and bleed design (DBB)

7. Anti-static device design

8. Full bore design for pigging purpose

9. Cavity self-relief when over-pressured

10. Body and bonnet completely welded

11. Optional double piston effect seats (DIB-1 & DIB-2)

12. Optional buried structure design for undeground 

application

13. Optional rubber seat design

14. Flexibal open-close, easy operation, and free of 

maintanance for any application

Specification

Details