Sealing assembly for valve member

Details Sealing assembly for valve member Sealing assembly for valve member

1992-02-03

1992-12-15

Fox, John C.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251175, 251315, F16K 506

Patent

active

051709899

ABSTRACT:
A seat assembly (28) for a valve member (20) includes a seat carrier (40) defining a pocket to receive a rigid seat ring (42). The outer peripheral surface (56) of the rigid seat ring (42) is spaced radially from the inner peripheral surface (45) of the seat carrier (40) to define a radial clearance therebetween of at least around 0.001 inch per inch of flow passage diameter. The sealing surface (58) of the seat ring (42) extends at 45 degrees to the longitudinal axis of the flow passage and the flexing and expansion of rigid seat ring (42) when the valve member (20) is moved to closed position permit the seat ring (42) to conform to irregularities in the adjacent mating sealing surface.

REFERENCES:
patent: 3331581 (1967-07-01), O'Connor
patent: 3556571 (1971-01-01), Paul, Jr.
patent: 4157170 (1979-06-01), McClurg
patent: 4290581 (1981-09-01), Moran et al.

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