| 摘要 |
A sliding gate valve having a fully open position, a shut-off position and a throttling position, the valve comprising: a fixed refractory plate having a first orifice disposed therein, a sliding refractory plate having a second, teeming orifice disposed therein, and a control system adapted to move the sliding plate in a controlled manner between the fully open position, the shut-off position and the throttling position, wherein, the shut-off position and the throttling position of the sliding plate are on opposed sides of the fully open position. An elongate refractory plate for a sliding gate valve having specified relative dimensions relative to the bore diameter is also disclosed. The sliding plate of the sliding gate valve may be biased into face to face contact with the fixed plate by biasing means. |
