| 摘要 |
<p>The branch coupling is equipped with a sealing system (9) incorporated into an open housing (10) provided in the internal wall of the end of the tubular element (5) which is equipped with a shut-off means (6) and constituted by: - a flexible circular valve (11) located in the open housing exhibiting a circular central part (14) coupled to its periphery by a connection element (15); - a flexible sealing ring (16) applied to the circular valve (11) and exhibiting a central opening (17), the diameter of which is less of that of the tool used to pierce the pipeline; and - a fixing sleeve (18) which can be inserted into the open housing (10) to hold the circular valve (11) and the sealing ring (16) in place. <IMAGE></p> |
