| 摘要 |
<p>A double check valve having a plotting function is provided to prevent equipment from being destroyed and an operator from getting hurt. A double check valve having a plotting function comprises: a hydraulic pump; a hydraulic cylinder(d) connected to the hydraulic pump, and running the work equipment; and a control valve(a) controlling pause and redirection, and installed in a flow path between the hydraulic cylinder and the hydraulic pump. The signal pressure is supplied to a signal pressure path from outside. The check function of the check valve is canceled in case the trigger pressure of the hydraulic cylinder is lower than the set pressure.</p> |
