Asymmetric seal segment configuration

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

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F16K 25/00 (2006.01) F16K 5/04 (2006.01) F16K 5/14 (2006.01)

Patent

CA 2207161

A valve comprising a body having an interior cavity, an inlet port and an outlet port; an upstream seat and a downstream seat positioned within the cavity, each seat including a bore in alignment with the inlet and outlet ports to define a flow passage through the valve body; a closure member movably positioned between the seats to either open or close the flow passage; a seat-to-closure member seal defined between each seat and the closure member, the seat-to-closure member seal defining a first area between the seat-to-closure member seal and the bore of the upstream seat; wherein the upstream seat includes a sealing member between the seat and the valve body which is positioned asymmetrically around the bore; and wherein the sealing member defines a second area between the sealing member and the bore which is larger than the first area.

Une valve comprenant un corps avec une cavité intérieure, un orifice d'admission et un orifice de sortie; un siège à contre-courant et un siège en aval situés dans la cavité, chaque siège comprend un alésage aligné aux sièges pour définir le passage du flux à travers le corps de la valve; un organe de fermeture qui peut être positionné entre les sièges pour ouvrir ou fermer le passage du flux; un joint d'organe pour fermer le siège est situé entre chaque siège et l'organe de fermeture, le joint d'organe définissant une première zone entre le joint d'organe et l'alésage de siège à contre-courant; dans lequel le siège en aval est muni d'un organe d'étanchéité situé entre le siège et le corps de la valve placé asymétriquement autour de l'alésage; et dans lequel l'organe d'étanchéité définit une seconde zone entre celui-ci et l'alésage étant plus grande que la première zone.

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