Valves and valve actuation – Fluid actuated or retarded – Fluid and non-fluid actuators
Patent
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.
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Flanigan Allen J.
Scott Samuel
Telektron Limited
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