| 摘要 |
<p>Pressure regulator, for the first reduction stage of a two-stage aqualung, comprising a reduction chamber (2) that communicates, by means of a supply valve comprising a valve seat (12) and a guided shutoff element (10, 10'), with an inlet passage (4) for the air or a mixture of breathable gases at high pressure and with a connecting passage (34) leading to a second reduction stage. Said first reduction stage is provided with a flexing chamber (22) for an impermeable and elastically deformable diaphragm (24) operating a cylindrical member (18) that controls the shutoff element (10) of the supply valve This cylindrical member extends through a communication passage from the chamber (22) to the chamber (2). The seat (12) of said supply valve is planar and is made of a relatively soft material, and said shutoff element (10, 10'), which enters the channel (46) of the valve seat (12), is conical- or hemispherical-sectioned and is made of a hard material. <IMAGE></p> |
