Acf Industries, Incorporated

Thomas M Jones

John W Freeman, Jr

Harold D Reagan

A valve bonnet structure has an inner ring spaced slightly from the inner surface of the bonnet structure and secured along its lower edge portion to the bonnet. An angle-shaped member having a downturned leg lapping the ring is secured to the inner surface of the bonnet structure above the ring. For repair of the valve, an upper valve bonnet portion having the angle-shaped member thereon is removed by a cutting tool with the ring remaining in place on the lower valve bonnet portion. After repair of the valve, the upper and lower valve bonnet portions are welded together adjacent the ring with the downturned leg thereon fitting over the ring, and a seal between the leg and ring prevents fluid within the valve structure from being exposed to the welding operation.

Method for repair of valves

Means and method for repair of valves

A tool for extracting press-fitted seats from annular seat recesses of a gate valve body by insertion within the flow passage from the valve chamber. The tool is generally cylindrical in shape and has a pair of spaced end caps secured to each other with a pair of spaced elastomeric annular seals between the end caps and seal retainers on each side of the elastomeric seals. Pressurized hydraulic fluid is inserted in the tool to urge the elastomeric seals outwardly; one seal being in fluid sealing contact with the seat to be removed and the other seal being in fluid sealing contact with the adjacent flow passage surface. An increase in the fluid pressure of the hydraulic fluid effects a flow of fluid in the recess behind the seat to move the seat out of its recess.

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Houston, TX, United States of America

Thomas M Jones