Hermann Rappold & Co. Gmbh

Franz Lengsfeld

Rudolf Muller

Johannes Uerlichs

A gate valve includes a water cooled valve casing coaxially attachable to a conduit and a valve plate mounted in the valve casing for sliding movement relative thereto between open and closed positions of the conduit. The valve casing includes a pair of annular mounting flanges adapted to be connected to the conduit and a pair of annular U-shaped sealing rings. Each sealing ring is positioned radially inwardly of a respective mounting flange, and the sealing rings are positioned on opposite axial sides of the valve plate. Each sealing ring includes a web portion, an inner leg portion extending generally radially outwardly from the web portion and forming a sealing surface for the valve plate, and an outer leg extending generally radially outwardly from the web portion. Each outer leg is connected to a respective mounting flange. The valve casing defines therein an enclosed interior space through which cooling water is adapted to flow. A support device is positioned within the interior space for transmitting to at least one mounting flange the stress applied to the respective sealing surface by the valve plate. The support device includes a first end portion supported against and fixed to the one mounting flange and a second portion freely contacting the respective inner leg without attachment thereto. The support device has a cross-section so as to not appreciably interfere with or restrict the flow of cooling water within the interior space of the valve casing.

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Julich, Germany

Franz Lengsfeld