Valve construction

Details Valve construction Valve construction

1978-10-31

1981-04-07

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

1374939, 251364, 251368, F16K 1506

Patent

active

042599849

ABSTRACT:
A pressure and vacuum relief vent has the stem of each of its pressure and vacuum valves, which are urged to their closed positions by weight, slidably mounted in a bushing of Teflon in a metallic seat ring so that corrosive build up does not occur on the bushing whereby each of the valves is responsive to the desired pressure differential due to weight. Each of the seat rings has a seat insert of Teflon locked in a groove in the seat ring with an epoxy seal between an outer inclined surface of the seat insert and an inner surface of the seat ring.

REFERENCES:
patent: 1608424 (1926-11-01), Putnam
patent: 1751664 (1930-03-01), Smith
patent: 1966264 (1934-07-01), Roye
patent: 2163472 (1939-06-01), Shimer
patent: 3083723 (1963-04-01), Duchin
patent: 3444889 (1969-05-01), Kiel
patent: 3598145 (1971-08-01), Wolfson
patent: 3897042 (1975-07-01), Kachergis
patent: 4091837 (1978-05-01), Edmunds

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