Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1993-07-28
1996-04-30
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277207A, 277229, 277235A, F16J 1500
Patent
active
055117970
ABSTRACT:
A tandem seal gasket assembly is provided that has a first seal that is compatible with highly corrosive process media or in applications where high purity is required. A radially outer seal is intended to address heat resistant or elevated temperature requirements. In a first preferred arrangement, a PTFE envelope is provided over a profiled metal base ring, the second seal defined by a spiral wound gasket, and an outer guide ring used to limit compression and add radial strength to the assembly. According to a second preferred arrangement, the annular dimension of the metal base ring is increased to cooperate with the PTFE envelope and define the first, radially inner seal. The profiled face of the metal base ring is extended and operatively receives graphite layers to define the second, fire resistant seal. A radially outer portion of the metal base ring extends from the profiled configuration and defines an integral guide ring.
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Nikirk Chris T.
Seidel Francis L.
DePumpo Daniel G.
Furon Company
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