Triple sealing seat for a conduit gate valve

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United States of America Patent

PATENT NO 9739377
APP PUB NO 20160281850A1
SERIAL NO

15072944

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Importance

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Abstract

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A triple sealing seat is provided in a conduit gate valve having at least one shut-off plate which is displaceable between an open and closed position with respect to the conduit. The triple sealing seat forms a substantially annular sealing surface. In order to increase the tightness, the annular sealing surface comprises a radial interior sealing and scraping edge which can be contacted with the shut-off plate during operation. Also provided is a first circumferential groove located radially further outside which is in communication with a first gas channel and to which a sealing gas pressure can be applied. Also provided is a second circumferential groove located radially further outside which is in communication with a second gas channel and to which a sealing gas pressure can be applied. Moreover a single-plate gate valve and a double-plate gate valve comprising the triple sealing seat are disclosed, along with a method for sealing a shut-off plate of a conduit gate valve by using the triple sealing seat.

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Patent Owner(s)

Patent OwnerAddress
Z & J TECHNOLOGIES GMBH52355 DÜREN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Travnicek, Roland Dueren, DE 4 5
Weidgang, Peter Dueren, DE 3 5
Wirtz, Ingo Eschweiler, DE 4 9

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