Fire-safe valve structure

Details Fire-safe valve structure Fire-safe valve structure

F - Mech Eng,Light,Heat,Weapons

16

K

251/33

F16K 5/00 (2006.01) F16K 5/06 (2006.01) F16K 5/20 (2006.01)

Patent

CA 1078360

FIRE-SAFE VALVE STRUCTURE Abstract of the Disclosure A fire-safe valve structure has a metal seat with an annular groove therein in which a resilient sealing ring is positioned in face-to-face contact with a valve member movable between open and closed positions. The annular groove has an annular space behind the resilient sealing ring to permit displacement of the sealing ring. A fusible material which melts at a predetermined high temperature is associated with the annular space and holds the sealing ring in contact with the valve member. Upon melting of the fusible material and subsequent metering through c metering open- ing, the sealing ring is displaced within the annular space and the valve member moves into a tight metal-to-metal contact with the metal seat.

307622

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