Seal for aggressive environments

Details Seal for aggressive environments Seal for aggressive environments

F - Mech Eng,Light,Heat,Weapons

16

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277/71

F16J 9/20 (2006.01) F16J 15/02 (2006.01) F16J 15/22 (2006.01) F16J 15/32 (2006.01)

Patent

CA 1327377

SEAL FOR AGGRESSIVE ENVIRONMENTS Abstract of the Disclosure A seal able to withstand high temperature, high pressure, corrosive environments including a ring-shaped core (15) com- prising an elastomer-impregnated asbestos yarn (16) winding, and an elastomer-impregnated asbestos yarn helical winding (18) surrounding and extending along the entire length of the core. The elastomer is a tetrafluorethylene-propylene copolymer or terpolymer, an ethylene-propylene copolymer or terpolymer, or a hydrogenated butadiene-acrylonitrile copolymer. There may be a plurality of helical windings (118, 140-142) around the core, one overlying another, and each turn of each winding may be parallel to, or at an acute angle to, a diameter of the core which passes through that turn. The cross-sectional shape of the seal may be circular, V-shaped, or any other advantageous seal shape.

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