Double Bleed&Block Valve with needle valve Pressure 150LB-2500LB material:A105,LF2,F11,F22,F316,F304,F51,F53,F55,F91 Double Bleed&Block ValveFLANGE END TYPEPRESSURE 150 TO 2500LBSIZE DN15 TO DN 80MATERIAL FORGED STEEL--CS ,SS,DUPLEX SSEND RF,RTJ,RF*NPT,RTJ*NPT Double Bleed&Block Valve