Fluid flow control valve with high temperature...

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

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

Patent

CA 2599262

A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve (20) including an inlet (31) and an outlet (32) a ball element (80) and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft (90,91) , rotates to abut the seal assembly (50) . While closed, the seal assembly including a seal housing (52) , a main seal (64) and a resilient member, contacts the ball element at the main seal, while the resilient member (70) biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath (72) between the main seal and seal housing, which is restricted by a high temperature seal .

L~invention a pour objet un robinet de réglage de type à sphère aux possibilités de sectionnement bidirectionnel. Le robinet à sphère (20) comprend une admission (31) et une sortie (32), une sphère (80) et un dispositif d~étanchéité (50). Lors de la fermeture du robinet, la sphère, montée de manière excentrée sur un arbre (90,91), tourne afin de venir buter contre le dispositif d~étanchéité (50). Pendant que le robinet est fermé, le dispositif d~étanchéité (50), comprenant un logement d~étanchéité (52), un joint principal (64) et un élément résilient, entre en contact avec la sphère (80) au niveau du joint principal (64), tandis que l~élément résilient (70) pousse le joint principal (64) vers la sphère (80). Le dispositif d~étanchéité (50) comprend également un passage secondaire (72) entre le joint principal (64) et le logement d~étanchéité (52), limité par un joint haute température.

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