| 摘要 |
PURPOSE:To provide a control valve allowing a throttle to be formed easily at an oil passage for leading pressure oil on the lower reaches of an orifice to a pressure chamber. CONSTITUTION:Pressure oil on the lower reaches of an orifice 9 is led to a pressure chamber 5 through an oil passage, and a spool 3 is moved by the action of differential pressure across the orifice 9 so as to make excess flow escape to a tank port. In a control valve of such constitution, a groove is formed at an insert hole 20 or a cylinder part 7a, overlapped with the insert hole 20, of an orifice member 7. Needless to say, grooves can be formed at both the insert hole 20 and cylinder part 7a. A throttle forming a part of the oil passage is constituted simultaneously with the insertion of the orifice member 7 into a connector 4. |
