Gas actuated valve system

Details Gas actuated valve system Gas actuated valve system

1990-04-11

1990-12-25

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

137 46, F16K 1736

Patent

active

049795287

ABSTRACT:
A gas actuated valve system includes a gas switch disposed in a primary gas circuit upstream of a gas driven actuator. The switch is movable to an open position when a pilot gas is supplied under pressure to the gas switch through a pilot circuit, and is movable to a closed position when the pilot pressure is released. A seismic valve coupled to the pilot circuit senses seismic activity and releases pilot gas pressure, thus moving the gas switch to the closed position, when seismic activity is detected.

REFERENCES:
patent: 3043321 (1962-07-01), Hewitt
patent: 3089512 (1963-05-01), Julien
patent: 3948478 (1976-04-01), Vind
patent: 4007906 (1977-02-01), Karpenko
patent: 4094332 (1978-06-01), Poff
patent: 4174729 (1979-11-01), Roark
patent: 4197867 (1980-04-01), Roger
patent: 4503717 (1985-03-01), Keller
patent: 4852600 (1989-08-01), Asbra
patent: 4920999 (1990-05-01), Asbra

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