Hermann Rappold & Co. Gmbh

Pietro Lonardo

A shut-off valve for interrupting a flow of a fluid through a pipeline, particularly a flow of high temperature air in a gas main associated with a blast furnace, includes a valve body adapted to be connected to the pipes of the pipeline. The valve body has a pair of spaced walls having openings aligned with each other and with the pipes when the valve body is connected to the pipes. The valve body has therein a chamber. A valve plate is movably mounted within the valve body for movement between a closed position, whereat the valve plate extends between and interrupts communication between the openings, and an opened position, whereat the valve plate is positioned within the chamber and opens communication between said openings. A gaseous cooling fluid is introduced into the chamber. The valve plate has therein channels through which the gaseous cooling fluid passes when the valve plate is in the closed position, to thereby cool the valve plate. The arrangement is such that the gaseous cooling fluid, after being heated during cooling of the internal portions of the valve, is allowed to be returned to the gas within the gas main, thereby avoiding heat losses.

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Genoa, Italy

Pietro Lonardo