Triple Offset Butterfly Valve Three Eccentric Butterfly Valve Hard Seal Butterfly Valve Size: 2"~72" Class: 150lb, 300lbs 8) Operating type: Worm gear, pneumatic actuator7) Packing: Graphite 25Cr1MOV 6) Stem material: 410(1Cr13), 420(2Cr13), 304, 316, 304L, 316L, 38CrMoAlA, 5) Body and disc material: WCB, CF3, CF8, CF3M, CF8M etc. 4) Suitable medium: Water, oil, gas, vapor, steam etc. 3) ...