Metallic seals for ball valve

Details Metallic seals for ball valve Metallic seals for ball valve

1977-06-16

1979-04-03

Schwadron, Martin P.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251172, 251181, 251315, F16K 506

Patent

active

041473272

ABSTRACT:
A ball or spherical plug valve has a pair of annular metallic seal rings mounted in grooves in the valve chamber around the inlet and outlet passageways of the valve body. Each metallic seal ring is of a one-piece generally uniform angled cross-section to form a leg portion and a free lip portion. The free lip portion extends transversely of the longitudinal axis of the passageways and a substantially continuous line contact is provided between an inner annular edge portion of the free lip portion and the valve member. The lip portion is bent from a free position substantially perpendicular to the leg portion to a substantially frusto-conical position when the valve is assembled so the seal ring acts as a spring to urge itself against the ball valve member to maintain sealing contact.

REFERENCES:
patent: 2573177 (1951-10-01), Bohlen
patent: 3077902 (1963-02-01), Vickery
patent: 3108779 (1963-10-01), Anderson
patent: 3177887 (1965-08-01), Priese
patent: 3269693 (1966-08-01), Gulick
patent: 3301523 (1967-01-01), Lowery
patent: 3394915 (1968-07-01), Gachot
patent: 3570811 (1971-03-01), Kruschik
patent: 3721425 (1973-03-01), Jones et al.
patent: 3841347 (1974-10-01), Kushiba
patent: 4061307 (1977-12-01), Yoshiike et al.

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