WATERFEEDS

Double eccentricity butterfly valves are designed for operation in very harsh environments that require high safety, trouble-free operation and minimal maintenance. The double eccentricity design ensures safe operation and tightness even with sudden changes in temperature or pressure. The purpose of the second eccentricity is to quickly relieve the seal of compression between the closing disc and the valve seat, which extends seal life and reduces torques. As the flapper closes, the rotational motion of the disc changes to linear, effectively pushing the disc into the seal space. This design also prevents unwanted accumulation of e.g. suspended.