Other

Hyman Posner

John A Conners

A clamp for securing in a fluid proof manner a wafer type butterfly valve to the coupling flange of a pipe. Wafer type butterfly valves are inserted between the flanges of two aligned pipes and are retained in position by bolts connecting the two flanges and engaging around the apertureless wafer flange of the valve body. The clamp of the invention is designed to secure such a wafer type butterfly valve to a pipe flange of the end of a pipe line to form a dead end pipe line. The clamp is made of two separate clamp members which are mirror images of each other. Each clamp comprises a flat arcuate flange section adapted to overlap a flange portion of the valve body. Said flange section has bolt receiving holes adapted to the aligned with half the number of bolt receiving apertures of the pipe coupling flange. Each clamp member further includes a collar section rigid with the flange section and perpendicular thereto. The collar section has portions adapted to come in close relation with the outer edge of the wafer flange of the valve body and is provided with a series of equally spaced indents for clearing the bolt receiving holes of the flange section. The collar sections serve to easily center the clamp with respect to the valve body and pipe flange and to further maintain said valve body against rotation. Preferably the bolt receiving holes in the flange section of each clamp member are threaded to eliminate the use of nuts.

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Roxboro, Canada

Hyman Posner