... . Trunnion Mounted Ball, Full Bore3. Anti-static Device4. Blow-out Proof Stem5. Fire Safe Design6. Emergency Sealant Injector7. Vent Valve, ... Yongjia, Wenzhou, Zhejiang, China, It is a professional valve manufacturing enterprise, which integrates R&D, manufacture and sales ... the best OEM partners of the other international brand valve producing corporations. With first-class quality, excellent ...