Safety valve actuator

Details Safety valve actuator Safety valve actuator

1994-02-28

1995-11-07

Hepperle, Stephen M.

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

92 5R, F01B 3112

Patent

active

054640407

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: 2080760 (1937-05-01), Condon
patent: 2605748 (1952-08-01), Rasoletti
patent: 5156179 (1992-10-01), Peterson et al.

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