Double Bleed&Block valve Flange end 150LB -2500LB Materal::A105,LF2,F11, ... F304,F304L,F51,F53,F55,F91 Good qualit Double Bleed&Block valveFlange type1. Two or Three-piece body design2. Double ... block and bleed or automatic pressure release in body chamber3. ... 34Face to face(end to end):ASME B16.10/API6DFlange connection:ASME B16.5,26"-60" to ASME B16.47 or ...