| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pressure loss reducing circuit for a work machine, which is simply constructed to reduce the pressure loss of return oil from an actuator to a directional control valve while suppressing an increase in the manufacturing cost and substantially eliminating the need of an installation space.SOLUTION: The pressure loss reducing circuit includes a bypass valve 16 provided in a directional control valve 2 between an actuator oil path 10 and a tank oil path 14, and screwed and mounted into the directional control valve 2 so as to be opened/closed with a signal from a controller 8. The controller 8 opens the bypass valve 16 depending on an operation signal from a switching spool 2a when return oil flows from an actuator 4 to the actuator oil path 10, to communicate the actuator oil path 10 and the tank oil path 14 with each other so that the return oil diverges into the switching spool 2a and the bypass valve 16 to reduce the pressure loss.</p> |
