Full throttle valve and method of tube and gate change

Abstract From the Canadian patent

A full throttling valve is disclosed as used on a tundish having a pour tube assembly at its lower portion a, sliding gate at a midportion, and a top plate in the mounting plate beneath the vessel. The sliding gate is shifted into position and then may be translated laterally for throttling and full shutoff. In the full shutoff configuration the tube holder assembly may be similarly moved in and out of position in less than one minute. Magnetic means are provided for each succeeding sliding gate coupled with the throttling mechanism to the end that successive gates may be positioned while in the throttling configuration. Gas passageways for inert gas are provided in the top plate to prevent …