What are the Advantages of Double Offset Resilient Seated Butterfly Valve Compared with Ordinary Valves?

Double offset resilient seated butterfly valve is an industrial valve that combines two geometric offsets with elastic sealing components. The core feature is that the valve stem axis forms a double offset design with the pipeline center and the sealing surface. Compared with ordinary butterfly valves, its technical advantage comes from the synergy of eccentric structure and flexible seal.

The first eccentricity makes the valve stem deviate from the pipeline centerline, driving the valve plate to detach from the sealing surface at the moment of opening; the second eccentricity designs the valve plate sealing ring as an eccentric conical surface to form a gradual opening and closing trajectory. This motion mechanism eliminates the sealing surface friction generated by the initial rotation of ordinary butterfly valves and reduces the operating torque by more than 90%. The valve seat is made of integral vulcanized rubber or resin composite material. When closed, it compensates for the manufacturing tolerance through elastic deformation to achieve zero leakage sealing under low pressure conditions.

How does the elastic valve seat cope with temperature changes?

The elastic modulus of the composite material fluctuates less with temperature, and maintains a stable deformation capacity within the normal temperature range, avoiding the sealing failure of ordinary metal valve seats due to thermal expansion and contraction.

The structure of the double offset resilient seated butterfly valve reduces mechanical wear through geometric eccentricity, and with the adaptive sealing of the elastic valve seat, it can simultaneously solve the problems of large opening and closing torque and low-pressure leakage of traditional butterfly valves.