| 摘要 |
PURPOSE:To prevent the generation of a peak pressure and the shock of a circuit during changeover, by disposing the one end of a plunger to the forward end of a nozzle part, attached to a main valve, so that the two end parts are positioned facing each other. CONSTITUTION:A main valve 7 is provided with a hole 25 comprising a large central hole 25a and a small hole 25b, and a small nozzle part 26 is about coaxially located to the upper end side. Meanwhile, a plunger 11 in a pilot part 3 is positioned coaxially with the nozzle part 26 of the main valve 7, and is movable in the same direction along an axis. This enables prevention of the generation of a peak pressure during changeover to a low pressure from a high pressure, and permits effective prevention of production of a shock at a hydraulic circuit during changeover to a low pressure from a high pressure. |
