Safety valve actuator assembly

Details Safety valve actuator assembly Safety valve actuator assembly

1991-12-09

1994-03-08

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

60474, 251 636, F16K 31124

Patent

active

052919188

ABSTRACT:
An emergency shut-down system to close a gate valve in a pipeline and therefore terminate flow. The closing action is initiated when a pilot valve senses pressure in the pipeline outside predetermined limits. This reduces the signal pressure in the system which, in turn, causes a fluid dump from the gate valve actuator which closes the gate valve and terminates fluid flow in the pipeline. The system is reactivated by manually pumping the system which re-opens the gate valve and allows fluid flow in the pipeline to again continue.

REFERENCES:
patent: 379237 (1888-03-01), McGinnis
patent: 1869687 (1932-08-01), Hart
patent: 2403262 (1946-07-01), Colley
patent: 3933338 (1976-01-01), Herd
patent: 4319603 (1982-03-01), Snyder

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