Valve seal with pressure relief channels and expansion voids

Details Valve seal with pressure relief channels and expansion voids Valve seal with pressure relief channels and expansion voids

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/22 (2006.01)

Patent

CA 2534517

A flexible, resilient incompressible seal for a butterfly valve is disclosed formed from a loop having a perimeter mounting surface and a perimeter sealing surface with first and second oppositely disposed axial surfaces extend between the perimeter sealing and mounting surfaces. Channels are positioned in the axial surfaces in spaced relation around the seal. The channels extend from the perimeter mounting surface toward the perimeter sealing surface and provide fluid communication to the perimeter mounting surface allowing fluid trapped against the perimeter mounting surface to escape when compressed by closing of the valve. A void space is positioned in the perimeter mounting surface in the form of grooves or dimples allowing the perimeter sealing surface to deform under compression when the seal is captured within the valve and substantially restrained from deforming.

L'invention concerne un joint flexible, souple et incompressible pour papillon, comprenant une boucle à surface de montage périmètrique et à surface d'étanchéité périmétrique, avec des première et seconde surfaces axiales opposées qui s'étendent entre les deux surfaces précédentes. Des canaux se trouvent entre les surfaces axiales en relation espacée autour du joint. Ils s'étendent depuis la surface de montage périmétrique vers la surface d'étanchéité périmétrique et assurent la communication fluidique avec la surface de montage périmétrique. Ainsi, le fluide emprisonné contre la surface de montage périmétrique peut s'échapper lorsqu'il est comprimé par la fermeture de la soupape. Un vide est ménagé dans la surface de montage périmétrique sous la forme de rainures ou de fossettes, permettant à ladite surface de se déformer sous la compression lorsque le joint est pris dans la soupape et sensiblement contraint pour ne subir aucune déformation.

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