Armco Steel Corporation

Larry D Leva

Thomas B Johnson

A through conduit gate valve having a carrier frame shiftable vertically in a valve chamber with gates mounted in the carrier frame as to be shiftable vertically in the carrier frame and as to be shiftable away from each other in the carrier frame. Means are provided on the carrier frame and on the gates to shift the gates toward valve seats and away from each other when the carrier frame is in the open and closed positions and to permit the gates to shift toward each other when the carrier frame is being shifted between its open and closed positions.

Gate valve

A gate valve for high and low pressure service conditions. Flanges extend from side edges of the gate member, the width of the gate member through the flanges being substantially identical to the diameter of the cylindrical valve chamber in the valve body. A relief is provided on either side of the valve chamber and so positioned that the flanges are received therein when the gate member is in the closed position, whereby the gate member is not guided in the closed position to eliminate any possible binding thereof. A cylindrical recess is formed in the wall of the valve chamber encircling each inlet and outlet opening, the recesses being concentric, and a valve seat is received in each recess. Each valve seat is provided with a bore therethrough coaxial with the flow passage and comprises a cylindrical portion received within its respective recess and an enlarged portion within the valve chamber in abutment with and supported from wedging by the adjacent surface of the valve chamber and presenting a planar surface adjacent the surface of the gate member.

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Houston, TX, United States of America

Larry D Leva