... include globe valves,check valves,safety valves,ball valves,butterfly valves,diaphragm valves,mud valve ect.And it ... standard: API609Inspection and Test: API598 Mutilevel sealing flange butterfly valve1,With 3D Eccentric structure ,the sealing ring of ... 304, 316, 304L, 316L, 38CrMoAlA, 25Cr1MoV7) Packing: graphite 8) Operating type: worm gear, pneumatic actuatorDrawing and technique data sheet ...