| 摘要 |
<p>The invention relates to a pressure reducing valve having a piston-like plug, and whose output pressure is automatically controlled relative to ambient pressure, particularly for scuba breathing apparatus regulators. According to the invention, an antifriction member (18) is interposed between the pad (13) which forms the valve seat and cooperates with the tubular plug (8) and the threaded stem (17) for adjusting the axial position of the pad (13), which antifriction member is free to rotate and to slide axially and prevents any direct contact between the pad and the adjustment threaded stem (17), thereby preventing the threaded stem from driving the pad along (13) into rotation. The antifriction member may be a disk (18) made of a relatively hard material with an appropriate surface smoothness, such as stainless steel or tungsten or a plastic material known with the trade name DELRIN, or the like. <IMAGE></p> |
