| 摘要 |
A passage (28) in the union (1) is closed by a membrane (14), while the union has a bottom part (5) inserted in the vessel wall to form a sealed joint and a top part (6) with a tubular portion (12). A puncturing boss (3) inserted in the passage has the hose fixed to it. The protective cap extending over the tubular portion, which has an external screw thread, is joined to the union via its bottom edge and via an annular fracture zone. After removal of the cap a union nut (4) screws onto the tubular portion, and as it turns thrusts the puncturing boss in the axial direction. |
