Butterfly valve

Details Butterfly valve Butterfly valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/226 (2006.01)

Patent

CA 2177026

A valve including an annular groove in the valve body at the periphery of the valve disc. A fire-safe seal provides a fluid seal between the valve disc and the valve passageway. A seal is disposed in the annular groove having an axial projection for retaining the seal and a sealing surface projecting radially inwardly in the passageway and being engageable by the peripheral edge of the valve disc. This sealing surface has an inverted resilient J-shaped portion. The seal also has a circumferential slot for receiving a metal ring to provide circumferential stability. A retaining ring having a blocking groove extends axially and inwardly thereof for receiving the distal end of the resilient J-shaped portion.

Soupape ayant une rainure circulaire au pourtour du disque de soupape. Un joint d'étanchéité résistant au feu assure l'étanchéité entre le disque de soupape et le passage de la soupape. La rainure circulaire est dotée d'une saillie axiale destinée à retenir un joint d'étanchéité, elle comprend également une surface d'étanchéité, qui se prolonge en direction radiale à l'intérieur du passage et qui s'enclenche avec le bord périphérique du disque de soupape. Cette surface d'étanchéité comprend un élément élastique en forme de J inversé. Le joint d'étanchéité comprend, sur sa circonférence, une fente dans laquelle s'insère un anneau de métal servant à en renforcer la circonférence. Un anneau de retenue avec rainure de blocage se prolonge dans la direction axiale et vers l'intérieur afin de recevoir l'extrémité distale de l'élément élastique en J.

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