| 摘要 |
<p>Valve for underwater aqualungs supplying devices, including a pressure chamber (6) and a watertight compensation chamber (7) adjacent and watertight separated by a partition wall (8) and a shutter (9) including a tubular stem (91) inserted, at least in part, inside each chamber; the pressure chamber (6) is provided with means (3, B) to connect with to a pressurized gas source (R) and with a housing (11) suitable for cooperation with an end (92) connected with the shutter (9); the compensation chamber (7) is provided with at least on opening (71) communicating with the outside and a stem end (91) in the shape of an expansion enlarged head (93) connected with the valve outlet (12), and a coil spring (10) watertight driven into such chamber between the expansion head (93) and the partition wall (8). In said valve the enlarged expansion head (93) of the shutter (9) is encircled by a thermal insulating annular part (13) watertight positioned (14, 15) between said head and the side wall (72) of the compensation chamber (7).</p> |
