Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1996-10-21
1998-08-18
Ferensic, Denise L.
Fluid handling
Line condition change responsive valves
Direct response valves
137515, 137859, 137845, F16K 1514
Patent
active
057946612
ABSTRACT:
A tank isolation valve assembly for use in an effluent discharge path to provide a vapor barrier to prevent back flow of gases while enabling fluid and solid substances to pass through in a desired flow direction. The assembly includes a main housing having an apertured outlet wall structure with an internal surface defining a valve receiving region, a second member coupled to the main housing and having an apertured wall structure with a valve member retaining surface facing the valve receiving region, and an isolation valve member. In one embodiment, the second member is a mating inlet housing with an inlet for connection to an effluent discharge port, and the main housing has an outlet port and a valve chamber. In another embodiment, the second member is a valve plate with a dished peripheral portion in sealed contact with a portion of the inner surface of the main housing. The isolation valve member is a flexible diaphragm mounted in the valve chamber in sealing relation therewith. The flexible diaphragm comprises a pair of disks each having a plurality of through slits extending from the center toward the periphery. The two disks are arranged with the through slits in non-overlapping relation so that solid portions of each disk overlie the slits of the other. The isolation valve member is preloaded in the assembly by means of a complementary pair of angled mounting surfaces formed on the internal surface of the main housing and the valve member retaining surface. A plurality of mounting bosses formed in the main housing extend through boss receiving apertures in the diaphragm and the second member and fix the diaphragm in position.
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Farid Ramyar
Ferensic Denise L.
Microphor, Inc.
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