| 摘要 |
<p>This device comprises a valve body (6) mounted in a sealed manner through the wall (2) of an enclosure (3) and a closure piece (7) received in the said body, and means (4) for selectively coupling the said enclosure (3) to a pipeline (5) in a sealed manner when the said closure element is in an open position. The coupling means (4) comprise a removable sleeve (18) designed to be fixed externally in a sealed manner to the said body (6) and a member (23, 31) for actuating the said closure member (7), mounted so that it can rotate in the said sleeve (18) in order to move the said closure member in the said sleeve between a closed position and the said open position in which the said enclosure (3) communicates with the said pipeline (5) by means of the said body (6) and of the said sleeve (18). <IMAGE></p> |
