Double-eccentric Butterfly Valve

Double-eccentric Butterfly Valve

The technologies used in the manufacturing of valves are making contributions to the industrial development. The double-eccentric butterfly valves, together with the check valves, air vacuum relief valves, resilient seated gate valves and others, are doing their own favors to meet the various requirements.

Many improvements are done to optimize the effects taken by the double-eccentric butterfly valves. For example, the rubber seated double-eccentric butterfly valve features a heavy loaded design for high-pressure and high flow-rate applications. Therefore, it is widely adopted for crude oil valves and high flow-rate piping systems resulting from the elaborately designed seat ring. Definitely, the set ring is able to keep the retainer free from any pressure caused by flanges on adjacent pipes, misaligned flanges or flexibility in the pipes.

Generally speaking, the double-eccentric butterfly valves are popular because of the following features. At first, the double offset construction design prevents galling of sealing joint face and maintains completeness of sealing and longer service life. Then, the wide-angle seat design prevents extrusion damage from over-tight contact between seat and disc. Besides, the easy and convenient maintenance is appreciated of the double-eccentric butterfly valves. Moreover, the streamlined spherical disc has enabled the high flow capacity. Finally, the light weight but simple and rapid in operation and better flow adjusting and sealing capability favors a lot.