| 摘要 |
The present invention relates to a valve for very high pressure fluid pipe comprising a valve body (13) wherein there is arranged a high pressure pipe (15), supplying downstream a fluid outlet pipe (16), the outlet pipe having a seat (12) wherein bears one of the extremities of a return stem (8), the assembly of said seat and said stem forming the valve itself, characterized in that there is arranged about said stem (8) an extensible tube (7) of which one of the ends is sealingly made integral with the valve body and of which the other end is sealingly made integral with, on the one hand, the other end (10) of said stem (8), and on the other hand, a connection flange (6) which is itself integral with a compressed air jack (1, 2, 3, 4), said extensible tube (7) and said stem (8) being provided, at their union, with means allowing the compression of said stem (8) to the seat (12). |
