Graphite packing

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

277105, 277123, F16J 1500

Patent

active

055426816

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.

REFERENCES:
patent: 1417877 (1922-05-01), Wright
patent: 1594517 (1926-08-01), Dufty
patent: 2567479 (1951-09-01), Hebard
patent: 3316940 (1967-05-01), Gratzmuller
patent: 4352499 (1982-10-01), Foster
patent: 4363463 (1982-12-01), Moon, Jr.
patent: 4394023 (1983-07-01), Hinojosa
patent: 4408769 (1983-10-01), Wolff
patent: 4438957 (1984-03-01), Williams et al.
patent: 4451047 (1984-05-01), Herd et al.
patent: 4577872 (1986-03-01), Bake et al.
patent: 4630636 (1986-12-01), Cutcher
patent: 4635945 (1987-01-01), Beck
patent: 4720113 (1988-01-01), Hertz, Jr.
patent: 4722507 (1988-02-01), Lindackers et al.
patent: 4811959 (1989-03-01), Bullard et al.
patent: 4826181 (1989-05-01), Howard
patent: 4886241 (1989-12-01), Davis et al.
patent: 4892320 (1990-01-01), Tuckmantel
patent: 4961991 (1990-10-01), Howard
patent: 5198063 (1993-03-01), Howard
patent: 5299812 (1994-04-01), Brestel et al.
Ucar Carbon Company Inc., Technical Bulletin No. 142 .COPYRGT.1991, no author available.
Ucar Carbon Company Inc., Technical Bulletin No. 142A .COPYRGT.1991, no author available.
Ucar Company Inc., Newsletter No. 143 .COPYRGT.1991, no author available.
Fisher Controls, "Packing for Sliding Stem Valves", Bulletin 59.1:060, Apr. 1990, no author available.
DuPont Product Information, "Teflon PTFE 30" author and date not available.

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