Seat arrangement with cavity pressure relief for a ball valve

Details Seat arrangement with cavity pressure relief for a ball valve Seat arrangement with cavity pressure relief for a ball valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 5/06 (2006.01)

Patent

CA 2643775

A ball valve seat arrangement is provided that permits relief of cavity pressure. The arrangement includes a valve body for receiving a resilient annular seat. First passages in the seat provide communication between the valve cavity, and a space formed between the seat and the valve body. When the cavity pressure reaches a certain level, a sealing point between the seat and the valve body is lost. Communication is thereby provided between the space and the valve passage to achieve cavity pressure relief.

La présente porte sur un ensemble de siège de soupape à bille qui permet une décharge d'une pression de cavité. L'ensemble comprend un corps de soupape pour recevoir un siège annulaire souple. Des premiers passages dans le siège fournissent une communication entre la cavité de la soupape et un espace formé entre le siège et le corps de la soupape. Si la pression de la cavité atteint un niveau précis, un point de scellage entre le siège et le corps de la soupape est perdu. Par conséquent, une communication est fournie entre l'espace et le passage de la soupape pour atteindre une décharge de la pression de la cavité.

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