valves butterfly valves, flange butterfly valves, wafer butterfly valves and butt weld butterfly valves etc. Size: 2- 72" 1) Pressure class: 150 - 300-600lbs ... ) Suitable medium: water, oil, gas,vapor,steam etc.5) Body and disc material: WCB, CF3, CF8, CF3M, CF8M etc.6) Stem ... ) Packing: graphite 8) Operating type: worm gear, pneumatic actuator etc. VALVES