Bi-directional sealed nozzle dam

Details Bi-directional sealed nozzle dam Bi-directional sealed nozzle dam

1988-07-29

1989-08-29

Foster, Jimmy G.

Receptacles

Closures

With seal means biased by internal pressure

138 89, 277102, 376204, F16L 5510

Patent

active

048609196

ABSTRACT:
A nuclear steam supply steam generator primary nozzle 16 is sealed by a nozzle dam having segmented bulkhead portions 42 and 45 with peripheral flanges 46,50,52. A rubber diaphragm with a body 54 and peripheral strata form oppositely opening cavities 56 and 58. Hydraulic pressure from either side enters one of the cavities to create a radial sealing force against the inside surface of nozzle 16. A closed cell foam rubber sealing material 76 of 20 to 30 durometer can be interposed between the cavity defining strata and the surface 16 to improve sealing. A hinged retaining ring 70 is pinned to hold the nozzle dam against radial surface 68 machined in nozzle 16.

REFERENCES:
patent: 3613936 (1971-10-01), Kaiser et al.
patent: 3747541 (1973-07-01), Reese
patent: 4470946 (1984-09-01), Vassalotti et al.
patent: 4585033 (1986-04-01), Westman
patent: 4671326 (1987-06-01), Wilhelm et al.
patent: 4682630 (1987-07-01), Schukel
patent: 4690172 (1987-09-01), Everett
patent: 4739799 (1988-04-01), Carney et al.
patent: 4777008 (1988-10-01), Shirasu

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