Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1992-12-15
1994-04-05
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277102, 277106, 277DIG6, F16J 1530
Patent
active
052998126
ABSTRACT:
A fluid valve graphite packing assembly with graphite packing rings and thin PTFE disc rings surrounding an operating valve member. Softer graphite packing rings on the interior are bounded by progressively harder graphite packing rings. A PTFE disc ring is inserted between the graphite packing rings. The packing is subjected to sufficient packing stress to cause the PTFE disc rings to extrude onto the operating valve member. A laminated packing ring formed of alternating sheets of flexible graphite and PTFE which is die cut to provide a crown shaped cross-section aiding in enabling PTFE extrusion to enhance valve operating member lubrication and sealing.
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DuPont Product Information, "Teflon PTFE 30" no date available.
Brestel Ronald R.
Funk Ronnald J.
Hutchens Wilbur D.
Jensen Frank E.
Pepper Virgil W.
Cuchlinski Jr. William A.
DePumpo Daniel G.
Fisher Controls International Inc.
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