| 摘要 |
PURPOSE:To perform specific control regardless of even variation in pressure on a control port side by making the pressure of the control port side which operates on a pressure reception part opposite to the force of a pilot mechanism. CONSTITUTION:When pressure is applied to the control port 11 in a state shown in a figure, the pressure is applied to a pressure chamber 17 through an orifice 21 and also operates on the pressure reception part 29 to press a control rod 22 to the left in the figure. When pilot pressure is applied to a pilot chamber 26 from a pilot passage 28 in said state, the pilot pressure operates on a pilot pressure reception part 23 to press the control rod 22 to the right in the figure. Therefore, the control rod 22 is moved to the position where the force of the pilot pressure balances with the force operating on the pressure reception part 29. Thus, the specific control is performed regardless of even pressure variation at the side of the control port 11. |
