| 摘要 |
A shut off and regulation member for conduits and the like is provided with a slide-like closure part (5) which, during the opening and the closing, slides with at least one plane sealing surface (7) along a corresponding sliding surface (8) of a slide seat, the closure part (8) and the slide seat being made with a ceramic material and their sealing and sliding surfaces (7, 8) being planar and polished, and if necessary lapped. In order to make the shut off and regulation member appropriate also to aggressive and hot media and to simplify its construction, there is provided a ceramic cylindrical body (1) which is arranged inside a tubular casing (2) comprising a side cutting for the closure part (5) and which is provided with a flow hole (4) and with a sliding surface (8) forming the slide seat. In one embodiment using a flat slide, the ceramic cylindrical body (1) is provided with an axial traversing flow hole (4) and with a slot (8) perpendicular thereto, whereas the ceramic closure part (5) is configured as a flat slide. An embodiment using a rotary slide provides that the ceramic cylindrical body has an intermediary wall in its flow hole and, against the cylindrical mantle, a polished surface forming a sliding surface, from which a transversal hole leads to the inner ends of the separate flow hole; it also provides that the ceramic closure part is configured as a rotary slide of which the front surface has a connection channel for the transversal holes. |
