Dual plate check valve

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

Patent

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F16K 15/03 (2006.01) F16K 25/00 (2006.01)

Patent

CA 2261035

A dual plate check valve comprises a substantially cylindrical valve body (10) provided with a diametrical cross-member (14) thereby defining a pair of substantially D-shaped apertures, and two substantially D-shaped plates (18), pivotally connected by a hinge means (20) parallel to said cross-member (14), and pivotable between a valve open position and a valve closed position in which the sealing face of each plate engages a sealing face provided on a valve seat (16) which surrounds each aperture. A groove is provided in each sealing face which is then filled with a weld inlay (40, 42) and then machined to provide a sealing face portion of a more durable metal alloy.

L'invention concerne un clapet de non retour à deux plaques. Ce clapet comprend un corps de clapet sensiblement cylindrique 10 pourvu d'un élément transversal diamétral 14, qui définit deux ouvertures sensiblement en forme de D, et deux plaques 18 sensiblement en forme de D, reliées en vue de leur pivotement par un moyen formant charnière 20 parallèle à l'élément transversal 14. Ce dernier peut pivoter entre une position de clapet ouverte et une position de clapet fermée dans laquelle la face d'étanchéité de chaque plaque se met en prise avec une face d'étanchéité prévue sur un siège de clapet 16 entourant chaque ouverture. Une rainure est ménagée dans chaque face d'étanchéité, et est ensuite remplie d'un cordon de soudure 40, 42 puis est usinée pour assurer une partie de face d'étanchéité d'un alliage de métal plus durable.

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