Shut-off valve
AssigneeXomox International GmbH & Co.
InventorWolfgang Gonsior
Life of this patent
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Abstract
A shut-off and regulating valve including a housing in which a valve disk is journaled for rotation, especially with double eccentricity. A metal seat ring is associated with a sealing surface of the valve disk. The seat ring includes an integral seat holding portion and has a radially deformable, resilient sealing lip. This sealing lip is permanently deformed radially outwardly by initial closure of the valve disk and contacts the sealing surface of the valve disk in a resiliently elastic manner. The valve has a simplified structure which exhibits improved sealing tightness and reduces the torque necessary to operate the valve.
Claims20
A shut-off and regulating valve comprising a housing, a valve disk journaled in said housing and having a sealing surface thereon, and a seat ring with which said valve disk can be brought into contact, wherein said seat ring is fastened directly in said housing by means of a seat holding ring portion which is an integral part of said seat ring, said seat ring is provided with a radially deformable resilient sealing lip which engages said sealing surface of said valve disk under radial bias, said seat ring has an axis and is initially formed with said sealing lip having substantially cylindrical inside and outside surfaces parallel to the axis of the seat ring, said sealing lip is subsequently permanently bent radially outwardly through a first angle by initial closure of said valve disk, said sealing lip is elastically deformed radially outwardly through a further angle each time said valve disk is closed, and said first angle is larger than said further angle.
Dependencies are inferred from the claim text.