Seat ring assembly for a valve

Details Seat ring assembly for a valve Seat ring assembly for a valve

1977-09-14

1979-05-22

Weakley, Harold W.

Valves and valve actuation

Reciprocating valve

Diverse material seal at valve interface

251317, 251174, F16K 100

Patent

active

041555368

ABSTRACT:
A seat ring assembly in a ball valve or a gate valve provides a primary metal-to-metal seal and a secondary metal-to-synthetic resin seal. The primary seal is accomplished by direct contact between the valve body and the interior conical surface of the seat ring. The secondary seal is made by contact between the valve body and a synthetic resin seat ring insert. The synthetic resin seat ring insert is slidably inserted into an annular groove cut into the conical surface of the seat ring. A compressible seal member is inserted between the bottom surface of the annular groove and the synthetic resin seat ring insert to urge the seat ring insert into contact with the valve body. An additional compressible seal member is inserted into an annular space defined by an inner cylindrical surface of the valve casing and a facing cylindrical surface of the seat ring.

REFERENCES:
patent: 2868497 (1959-01-01), Graham
patent: 3109623 (1963-11-01), Bryant
patent: 3301523 (1967-01-01), Lowrey
patent: 3335999 (1967-08-01), Lowrey
patent: 3472270 (1969-10-01), Masheder
patent: 3497177 (1970-02-01), Hulsey
patent: 3667727 (1972-06-01), Bowden

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