Fmc Corporation

John N McIntyre

Charles Edward Jennings

Alfred P Regitz

Michael R Williams

Lien-Yan Chen

Bashir M Koleilat

Bob C Hopkins

Claud C Barrington

Stephen P Barrett

Ronald L Riess

Kendall E Keene

A hydraulically operated actuator for a sliding gate valve designed for use in a subsea environment. The actuator includes a manual override system that functions independently of the actuator's hydraulic piston and return spring, an externally accessible valve gate drift adjustment, an externally adjustable upstop for the actuator stem, a stem thread assembly that can be manufactured from a material different from the actuator stem to prevent or reduce the possibility of thread galling, a hydraulic control pressure porting system integral with the hydraulic cylinder to minimize space requirements, and a facility for accommodating an optional external electrical stem position indicator package.

Subsea gate valve actuator with external manual override and drift

A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat.

Fire-resistant gate valve

A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat a eutectic ring assembly for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and a lost motion connection between the valve stem and the valve closure element.

Valve stem-to-bonnet backseat

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Spring, TX, United States of America

John N McIntyre