Valve actuator

Details Valve actuator Valve actuator

1984-10-04

1987-03-24

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Fluid and non-fluid actuators

744248VA, 251 58, 251 634, 251252, 92 33, F16K 31163

Patent

active

046519696

ABSTRACT:
A valve actuator for a subsea oil well installation includes a rotatable adjusting member (53) for engagement with the valve spindle, and a linear fluid actuator (17) coaxial with the adjusting member and operable by fluid pressure pulses to index the adjusting member around selectively in either direction. A mechanical movement converts linear motion of the actuator to rotary motion of the adjusting member. A fluid operated clutch selectively connects the fluid actuator to the adjusting member. A shaft (65) projects from the rear end of the actuator casing to permit manual adjustment as well. Position sensors (120) emit signals indicative of the valve position, and a pointer (123) at the rear of the casing provides a visual indication of the valve condition.

REFERENCES:
patent: 1341319 (1920-05-01), Hodges
patent: 1648710 (1927-11-01), Wright
patent: 1776228 (1930-09-01), Coffman
patent: 2199328 (1940-04-01), Baer et al.
patent: 2225790 (1940-12-01), Nardonez
patent: 2315775 (1943-04-01), D'Arcey
patent: 2318010 (1943-05-01), Panish
patent: 2340999 (1944-02-01), Trott
patent: 2608374 (1952-08-01), Morehead
patent: 3159378 (1964-12-01), Haag
patent: 3298659 (1967-01-01), Cupedo
patent: 3319925 (1967-05-01), Kojima et al.
patent: 3542331 (1970-11-01), Canalizo
patent: 4161242 (1979-07-01), Moores, Jr. et al.
patent: 4436280 (1984-03-01), Geisow
patent: 4504038 (1985-03-01), King

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