PERFECCIONAMIENTOS EN CONJUNTOS DE PLACAS REEMPLAZABLES PARA DISPOSITIVOS DE VALVULAS ROTATORIAS.(COMO DIVISIONAL DE LA PATENTE NUMERO 481.673)

摘要

A valve plate for a gate valve for controlling the flow of molten metal is formed from two or more identical ceramic plate sections (25) having mating semi circular recesses (26) to enclose and lock in position one or more tubular ceramic nozzles (45,48). The plate sections and nozzles are held together and supported by a metal case (41) which in the bottom valve plate shown in Fig. 7 has depending, metallic tubular casing sections (50) to encase the lower portions of nozzles (45,48) and lower nozzle extensions (52,54) which are releasably mounted by bayonet fittings in the casing sections (50).