| 摘要 |
PURPOSE:To provide a precise pressure reducing function by providing a port fed with the output pressure between an input port fed with main pressure and a feedback port. CONSTITUTION:An input port 42a fed with the high line pressure of a line 101, an output port 42b feeding the reduced output pressure to a line 104, a feedback port 42c feeding the output pressure to a pilot pressure chamber 68 via an orifice 69, and a drain port 42d are provided, and an output feed port 42e directly fed with the output pressure not via the orifice 69 is provided between the input port 42a and the feedback port 42c. The constant reduced output pressure (reducing pressure) corresponding to the energizing force of a spring 67 is obtained, the operating oil is prevented from leaking into the pilot pressure chamber 68 through a gap between the inner periphery of a valve cylinder 66 and the outer periphery of a spool 65 from the input port 42a, thereby a precise pressure reducing function by a pressure reducing valve 42 is obtained. |
