| 摘要 |
<p>An inlet (14) connected to a source (7) of pressurized gas and an outlet (16) connected to a receiver (4) are linked by a channel (31). A delivery valve (36) limiting the outlet pressure to a set maximum (Ps) is mounted between the channel and an inert gas outlet (27). A suction valve (39) keeping the outlet pressure above a set minimum (Pi) is mounted between the channel and a fluid inlet (27). The first valve is an open/shut valve which can move from a lower closed position to an upper open position under the action of a positive pressure difference between the pressures in the channel and the outlet, mass calibrated to act on a preset difference P<+>c. The valve seat is horizontal. The outlet orifice is connected to ambient atmosphere at pressure Pa and P<+>c = Ps-Pa. The second valve is a second open/shut valve moving between a lower closed position and an upper open position under the action of a negative pressure difference between the pressures in the channel and the inlet, mass calibrated to a preset difference P<->c. The valve seat is horizontal. The inlet orifice is connected to ambient atmosphere at pressure (Pa) and P<->c = Pi-Pa. Gas supply system including such a regulator, delivering gas expanded to a pressure (Pc) which is between (Pi) and (Ps) and preferably near (Ps).</p> |
