Detailed Product Description

Double Eccentric Butterfly Valve
Connection Type: Flange Type
Operated Manner:Worm Gear, handle, Operation: Lever, Gear, Electric actuator, Pneumatic actuator
Design and Manufacture Standard:API609
Norminal Pressure:150-300LB
Size:2-56"
Body Material:WCB, CF3, CF8, CF3M, CF8M, Monel
Seat:WCB, CF3, CF8, CF3M, CF8M, Monel 
Working Temperature:-196-550℃ (Different raw material for different temperature)
Suitable:Water, oil, gas and other causticity medium etc (Different raw material for different medium)

Generally, high performance butterlfy valves are single eccentric or double eccentric. As to double eccentric structure, valve shaft is designed deviated from the centerline of sealing face to form up the first eccentric, and slightly deviated from the centerline of pipe to form up the second eccentric. The eccentrics are to make seat disengaged from sealing ring to lower the friction when disc is opened to approximately 20 degree.