Double Bleed&Block valve Flange end 150LB -2500LB Materal::A105,LF2,F11,F22,F316 ... ,F316L,F304,F304L,F51,F53,F55,F91 Good qualit Double Bleed ... . Two or Three-piece body design2. Double block and bleed or automatic pressure release in body chamber3. Trunnion supported design ... F22,F316,F316L,F304,F304L,F51,F53,F55,F91 Double Bleed&Block valve