TIANHE FOSV is a dual body full-opening safety valve, that does not interfere with  the running of tools such as core barrels or survey instruments. It is designed to  be stabbed into the top joint of drill pipe or tubing string at the rig floor and closed  quickly in case a well kicks. 

The ball-type design permits the valve to be compact, easy to handle, and have  great strength. Standard test pressure is 10,000 psi, but higher pressure ratings are  available. FOSV and operating wrench be should be maintained on the rig floor at all times.

When ordering please specify

Connection. O.D. and I.D.