Hermann Rappold & Co. Gmbh

Hermann Rapold & Co. Gmbh

Johannes Uerlichs

Rudolf Muller

Hermann-Josef Stolberg

Franz Lengsfeld

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.

Gate valve for use in large size conduits

In a blast preheater for a blast furnace, a control housing has at least one open ended cylinder vertically mounted therein. The cylinder, or each of several cylinders has several axially spaced rows of circumferentially spaced slots, extending through the wall of the cylinder. A slider is slidable in the cylinder for opening, restricting or closing such slots. Wall means are mounted in the housing and are so arranged that in each position of the slider, a first part of the housing surrounding at least one of said rows of slots is separated by the wall means from at least one other part of the housing which communicates with the interior of the cylinder. Separate connectors communicate respectively with the so separated parts of the housing and connect the same to different parts of the blast preheater system, such as the inlet for cold air, under pressure; the inlet for combustion gas, for starting the preheater under lower pressure; the outlet for flue gas from the preheater; and the preheater outlet connecting the hot blast to the blast furnace. One of the new control housings can be provided for each of these lines, or for several of them. The new cylinder and slider system serves to fully open or fully close the line and also to regulate the line by restricting the slots.

Control apparatus for air blast preheaters of blast furnaces

A shutoff and control slide includes a cylinder having at least one row of circumferentially spaced elongated openings, and a sliding sleeve mounted for axial displacement in the cylinder. Rings are sealed to the inner surface of the cylinder on opposite axial sides of each row of openings, and each ring has an axially facing abutment surface. Abutment members, each having an axially facing abutment surface, extend outwardly from the sliding sleeve. Sealing members are provided on at least one of the ring and abutment member abutment surfaces.

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Munich, Georgia

Johannes Uerlichs