High strength ball valve seat assembly

Details High strength ball valve seat assembly High strength ball valve seat assembly

1986-04-23

1988-06-14

Chambers, A. Michael

Valves and valve actuation

Rotary valves

Ball valve

251174, F16K 506

Patent

active

047507080

ABSTRACT:
A ball valve for low and high pressure applications including a metallic seat member that toroidally deflects into sealing engagement with a ball member outer surface upon valve assembly. The seat member includes an outer circumferential rim portion and a radially inward extending frusto-conical portion. The rim portion is radially interposed between an annular, resilient flange member and an annular support member. The rim portion and resilient flange member define a behind-the-seat seal while the frusto-conical portion and support member abuttingly engage during extreme pressure conditions for added structural support. The radially innermost edge of the frusto-conical portion has an arcuate conformation to inhibit scoring of the ball member surface.

REFERENCES:
patent: 3077332 (1963-02-01), Burtis
patent: 3331581 (1967-07-01), O'Connor
patent: 3394915 (1968-07-01), Gachot
patent: 3834663 (1974-09-01), Donnelly
patent: 4126295 (1978-11-01), Natalizia
patent: 4241895 (1980-12-01), Sterneuberg
patent: 4303249 (1981-12-01), Illy

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