... &Block valve Flange end 150LB -2500LB Materal::A105,LF2,F11,F22,F316,F316L,F304,F304L,F51,F53,F55,F91 Good qualit Double ... &Block valveFlange type1. Two or Three-piece body design2. Double block and bleed or automatic pressure release in body chamber3. ... Inconel seat springs7. Sealant injection fittings for emergency stem or seal sealing8. Direct mount topworks pad for actuator or gear operator9 ...