| 摘要 |
PURPOSE:To provide a primary pressure and an always constant secondary pressure by means of one oil pressure pump. CONSTITUTION:The minimum pressure of an entrance pressure P1 is compensated by providing a sequence valve 4 in a primary circuit 3 for connecting a main entrance port 1 to a primary pressure exit port 2, the upstream side of the sequence valve 4 is connected to a secondary pressure exit port 7 by means of a secondary circuit 5 and a pressure reducing valve 6 is provided in the secondary circuit 5 so as to keep the pressure of the secondary pressure exit port 7 constant. |
