Excess flow control valve

Details Excess flow control valve Excess flow control valve

1988-10-11

1989-05-16

Rivell, John

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137517, F16K 1730

Patent

active

048300462

ABSTRACT:
A liquid flow shut-off valve has a one piece housing with an internal ball valve biased by a coil spring to a normal position axially separated from its valve seat, precompression of the coil spring being adjusted so that a predetermined drop in downstream pressure allows upstream pressure to seat the ball valve and stop flow.

REFERENCES:
patent: 2929399 (1960-03-01), Magowan, Jr.
patent: 3106226 (1963-10-01), Machen
patent: 3331389 (1967-07-01), Kirk
patent: 3489172 (1970-01-01), Whitmore
patent: 3977430 (1976-08-01), Bushee
patent: 4638835 (1987-01-01), Chuang

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