| 摘要 |
The invention relates to a shut-off valve 1 for pipelines and/or for tanks that hold liquids. The shut-off valve 1 has two-part valve housing 3 with a passage opening 4. In the passage opening 4, there is likewise a sliding and/or rotatably supported, spherical closure element 5 that likewise has a passage opening 4'. The closure element 5 is surrounded by two half-shell shaped sealing shells 6, 7. The sealing shells 6, 7 form a passage opening 4'' that corresponds to the passage opening 4' of the closure element 5 and consist of a softer or more elastic material in comparison to the closure element 5. Each of the sealing shells 6, 7, at least on their opposite faces 8, has a ring-shaped device 9, 9' for purposes of securing between the housing halves, the valve housing 3, 3' or between the flange 28 of the valve housing 3, 3'. This device or the two ring-shaped flanges 9, 9' can be inserted into a recess 16 of the valve housing 3, 3' and are held together directly or indirectly by the valve housing 3, 3'. |
