| 摘要 |
System to hermetically seal an access opening (3) to a chamber (2) suited to contain toxic and/or radioactive fluids, having a mobile closing panel (5) to be arranged, in use, in front of an annular wall portion (8) surrounding the opening (3), so as to close the opening (3), and at least two annular sealing gaskets (14, 15), which are suited to be interposed, concentrically to one another, between the closing panel (5) and the annular portion (8), so as to ensure a hermetic seal and to define a hollow space (18) between the inner surface of the closing panel (5), the annular portion (8) and the two gaskets (14, 15); the annular portion (8) having a hole (11) in correspondence to said hollow space (18), connected to a control chamber (12) through a conduit (13) to connect the hollow space (18) to the control chamber (12), thus allowing the hermetic seal of the system to be controlled. |
