| 摘要 |
The present invention relates to a relief device for a pressurised gas tank, in particular for gas cylinders for self -propulsion comprising a device bod (14) y which defines an inner chamber (10) in fluidic communication with said gas tank through an entry duct (9) and with the atmosphere through at least one exit hole (6), a shut-off device (7) is housed at least partially in said inner chamber and movable between a closed position, and an open position of the entry duct, and retaining devices associated with said shut-off device movable between an active position blocking the shut-off device in the closed position, and an inactive position releasing said shut-off device. At least one solid, heat - sensitive element (13) interacts with said retaining devices to keep them normally in said active blocking position. Said element is suitable to melt at a predefined temperature to enable the shifting of the retaining devices into said inactive release position. Moreover, said heat - sensitive element is housed in a respective seat (32) made in the stem (24) of a retaining screw (16) screwed into a threaded hole (50) made in a wall of the device body defining the inner chamber. |
