MEDIUM PRESSURE TYPE POUR-OUT VALVE AND POUR-OUT METHOD FOR CONTROLLING POUR-OUT FLOW FROM POUR-OUT VESSEL IN WHICH MELTED MATERIAL IS ENTERED

摘要

Refractory plate valves are shown for controlling flow of molten material with structure providing a uniform controllable variable sealing pressure over the entire area of the sliding plate surface which surrounds the depending nozzle sufficient to deflect the refractory plates into a sealing relationship to prevent the intrusion of the molten material between the plates. The uniform pressure is applied to the sliding plate by pressurizing a fluid within a chamber in the sliding gate carrier that is immediately below a flexible diaphragm supporting the sliding plate. This pressure is applied from an external or internal source and may be controlled during the tapping and teeming phases of the use cycle and additionally may be completely relieved for ease of opening and closing of the device during the service phase of the cycle.