| 摘要 |
PURPOSE: To secure the rapid switching characteristic of a pilot valve by making a flow cross sectional area of a valve inlet to be normally connected to a pump connection smaller than that of a valve discharge being regulated by a second valve seat of this pilot valve. CONSTITUTION: An actuating piston 24 is energized by a spring member 28 having a fixed spring constant, while a flow cross sectional area of a valve inlet 19 to be normally connected to a pump connection 1 is regulated by a first valve seat of a pilot valve 4. In addition, the flow cross sectional area of the valve inlet 19 is made smaller than that of a valve discharge 20 being regulated by a second valve seat of the pilot valve 4. |
