| 摘要 |
<p>A hydraulic proportional valve consisting of a throttle valve and a pressure-maintaining valve, with which a specific pressure differential can be pre-selected between the inlet pressure and the user pressure. The pressure-maintaining valve has a support spring whose abutment is hydraulically reinforced. The reinforcement device (17) provided for this purpose is pressure-controlled by a continually controllable pressure regulating valve (19). The pressure-regulating valve is actuated as a function of hydraulic parameters e.g. load pressure or servo-control pressure of the throttle valve (1).</p> |
