| 摘要 |
PCT No. PCT/GB92/00080 Sec. 371 Date Jul. 6, 1993 Sec. 102(e) Date Jul. 6, 1993 PCT Filed Jan. 14, 1992 PCT Pub. No. WO92/12815 PCT Pub. Date Aug. 6, 1992A rotary valve for use in the release of a molten solid from a vessel comprises a valve member having a passage, inlets to the passage being present in the head of the member. The valve member mates with a wall of a seating member, the wall having a taller first section and a lower second section selected to close off or open the inlets, respectively. The wall portions are shaped relative to the surfaces of the member to avoid metal freezing and the parts sticking. The passage includes ribs to cause the stream to emerge with parallel sides.
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