Relief and make-up valve assembly

Details Relief and make-up valve assembly Relief and make-up valve assembly

1978-06-16

1980-08-19

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

1374545, F16K 17196

Patent

active

042179270

ABSTRACT:
A relief and make-up valve assembly connects first and second passages in a fluid pressure device and includes a hollow housing having an outer valve seat communicating with the first and second passages, an outer valve member for relieving fluid from the first passage to the second passage in response to a preselected high pressure in the first passage, the outer valve member having an inner valve seat, an inner valve member for relieving fluid from the second passage to the first passage in response to a pressure in the second passage above that in the first passage, a first spring for resiliently urging the outer valve member against the outer valve seat, and a second spring for resiliently urging the inner valve member against the inner valve seat.

REFERENCES:
patent: 2979077 (1961-04-01), Swenson
patent: 3100503 (1963-08-01), Tennis
patent: 3112763 (1963-12-01), Tennis et al.
patent: 3153423 (1964-10-01), Biello et al.
patent: 3856041 (1974-12-01), Cryder et al.
patent: 4016903 (1977-04-01), Akashi

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