Tank vacuum limiter assembly

Details Tank vacuum limiter assembly Tank vacuum limiter assembly

1998-07-21

1999-10-05

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

Direct response valves

137526, 251363, F16K 1500

Patent

active

059608234

ABSTRACT:
A vacuum limiter valve assembly has a valve body screwed into an opening on a cargo tank. It has a relatively soft elastomeric, lightly spring-loaded seal closing the passageway through the valve body between the tank interior and the surrounding environment outside the tank. The relatively small area of the seal which would otherwise be exposed to tank cargo or vapors therefrom, is protected by a shield of material which is relatively inert and unaffected by most known chemicals, but also capable of a sealing function. The shield does not interfere with the normal sealing function, nor does it interfere with the opening of the vacuum limiter valve when needed to avoid development of excessive vacuum in the tank.

REFERENCES:
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patent: 4518329 (1985-05-01), Weaver
patent: 4674575 (1987-06-01), Guess
patent: 4676266 (1987-06-01), Johnson
patent: 4691734 (1987-09-01), Fort

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