Valve construction
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United States of America Patent
Stats
-
Apr 7, 1981
Grant Date -
N/A
app pub date -
Oct 31, 1978
filing date -
Oct 31, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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