Double Bleed&Block Valve FLANGE END Material::A105,LF2,F316,F316L,F304,F304L,F51,F53,F55,F91 GOOD QUALITY WITH FAST DELIVERY Double Bleed&Block ValveFLANGE TYPE PNEUMATIC OPERATORPRESSURE 150-2500LBSIZE DN15-DN400END RTJ RF BWMATERIAL FORGED STEEL ,CS,SS,DUPLEX SS AND SO ON