You are here: Home>Special Groups>DST Tubing String Testing Valve DST Tubing String Testing Valve View more specifications DST Tubing string testing valve for you Show: 8 16 32 item per page View gallery View list View gallery View list goto 5" Tubing Testing Valve Flapper type for DST Operation in well testing TST valve - 5" The 5" Tubing testing valve/TST valve is applied for Drill stem testing/DST operation in cased hole well testing for H2S above 175oC working condition View the Video Well Testing Tubing String Testing Valve 5" x 15000psi TST - 5" Well Testing Tubing String Testing valve is named TST valve, applied for Drill Stem Testing Operation in Well Testing, the TST valve is used for H2S Drill stem testing TST tubing string tester valve flapper type 5" TST Valve Drill stem testing tools tubing string testing valve TST is for cased hole full bore type in size 3 7/8" and 5" in owrking pressure 105Mpa. Show: 8 16 32 item per page View gallery View list View gallery View list