Braided high-temperature packing comprising a core of folded fle

Stock material or miscellaneous articles – Sheet including cover or casing – Noninterengaged fibered material encased

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57230, 57231, 57232, 87 1, 87 6, 87 9, 277213, 277227, 277229, 277230, 277235R, 277DIG6, 428 74, 428245, 428260, 428297, 428365, 428375, 428377, 428408, 428380, 428397, 428902, B32B 104, D06P 700

Patent

active

052252620

ABSTRACT:
A high temperature, high pressure resistant packing (e.g., for the packing gland of a valve stem) has a core of density 1.3-1.6 gm/cc that includes a plurality of strands, each strand including a flexible graphite tape, longitudinally corrugated and folded into at least two longitudinally extending partially superimposed layers. Preferable, each strand is overknitted with a reinforcing wire, the strands in the core are braided, and a jacket, which includes a carbide fiber, an inorganic fiber, and a phenolic fiber, is disposed about the core.

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Bake et al., Rockwell International, "Tests of Asbestos-Free Stem Packings for Valves for Elevated Temperature Service", 1986, Rochwell Technical Article V-Rep. 86-2.

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