Subsea gate valve actuator with external manual override and...

Details Subsea gate valve actuator with external manual override and... Subsea gate valve actuator with external manual override and...

F - Mech Eng,Light,Heat,Weapons

16

K

251/13

F16K 31/122 (2006.01) E21B 34/04 (2006.01)

Patent

CA 1228582

-19- Abstract of the Disclosure 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 unstop 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.

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