Double Eccentric Butterfly ValveMain Features:The turning center of the butterfly plate is on the center line of the valve body and the sealing face section of the butterfly plate. In closing, the ex-circle sealing face of the butterfly plate will extrude the valve seat made of synthetic rubber, generating elastic deformation on the seat to form an elastic force used as a sealing specific pressure so as to guarantee the tightness of the butterfly valve.Main Parameter SpecificationDesign and Manufacture:API 609,GB/T 12238Face to Face Dimension:API609,ISO5752,ASME B16.10,GB/T 12221Flange Connection Dimension:ASME B16.5,ASME B16.47,GB/T 9113,JB/T 79Test and Inspection:API 598,JB/T 9092,GB/T 13927Pressure Temperature Rating:API 609,ASME B16.34,GB/T 12224Product RangeBody material:Cast Steel,Stainless Steel,MonelNominal diameter:2"~120"(DN50~DN3000)End Connection: RF,Wafer,Lug,etcPressure range: Class150~600(PN16~PN100)Working temperature:-196℃~+550℃Operation : Handle, Gear, Electric actuator, etc