| 摘要 |
The invention relates to a cut-off device, particularly for lines carrying fluid for relatively large temperature ranges, somewhat in the form of a sleeve valve or of a stopcock having at least one seal (2) which contains graphite clay and which, to increase or improve the life and long-term sealing, consists of a pressed body with a density of 1.5 to 2.2 g/cm<3>, either pressed from powder or formed from layers of laminate, whose cut edges abut onto the cut-off element (3).
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