Fluid cutout valve

Details Fluid cutout valve Fluid cutout valve

1978-04-27

1980-02-19

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137461, 137462, 137495, 137498, F16K 1734

Patent

active

041889711

ABSTRACT:
A valve disposed in a fluid system for cutting off the flow of fluid from a ource of that fluid to a fluid-using environment upon the occurrence of either an excess or unduly high fluid flow rate or an excess pressure condition experienced in or near the environment. An obturator, disposed in a flow chamber between the valve inlet and outlet, is controlled by two independent assemblies which are responsive to either the flow rate through the valve or the pressure downstream of the valve in the environment. A bias spring, part of a cutout obturator assembly and located in the obturator, maintains the obturator in an open position until an excess flow rate promotes a seating of the obturator. A spindle slidingly connects the obturator to a sensing piston assembly so that when an excess pressure condition is experienced in the environment the obturator is pulled into the seated position causing a cessation of fluid flow through the valve and an isolation of the environment from the fluid source.

REFERENCES:
patent: 3368581 (1968-02-01), Glover
patent: 3400734 (1968-09-01), Rosenberg
patent: 3621873 (1971-11-01), Kenann

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