| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid pressure control system capable of increasing a speed in depressurization and completely depressurizing a load with inexpensive means.SOLUTION: In a hydraulic pressure control system 10 for increasing a speed in depressurization by using a pump 12, a check valve 22 and a differential pressure valve 24, a throttle valve 32 is disposed in parallel with the check valve 22, one end side of the throttle valve 32 is connected with a downstream-side line 20b of a line 20, and the other end of the throttle portion 32 is connected to an upstream-side line 20a of the line 20. When pressure difference between the upstream-side line 20b and the upstream-side line 20a generated in the throttle valve 32 in depressurizing becomes higher than a constant pressure, the differential pressure valve 24 is operated to discharge a liquid in the downstream-side line 20b, and a pressure of the downstream-side line 20b and a pressure of the upstream-side line 20a become equal to each other through the throttle valve 32 when a detected pressure reaches a target pressure. |
