| 摘要 |
A pair of valve plates 1, 2 for a rotary or linearly sliding gate valve, particularly for use in controlling the flow of molten metal, each have a sliding surface 4 which, in use, slide relative to one another and a discharge aperture which passes through the plate and opens onto the sliding surface. Each aperture is defined by two wall sections 21 which extend perpendicular to the intended direction of relative displacement of the sliding surfaces and two wall sections 22 which extend parallel to the said direction of displacement. <IMAGE> |
