| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic valve in which a flow priority valve is integrated with a bleed-off valve which heightens the pressure of extra oil supplied from the flow priority valve by a prescribed value over a load pressure. SOLUTION: The spool 20 of the bleed-off valve slidably fitted in the bore 7 of the valve housing 2. The spool 22 of the flow priority valve is slidably fitted in the spool 20 of the bleed-off valve to lead the pressure oil priority in constant quantity from a pump to a steering circuit PF, and to supply extra oil a hydraulic working machine W like a lift. The extra oil supplied from the flow priority valve spool 22 is pressurized higher by a given pressure value than the load pressure PS, and then supplied to the hydraulic working machine W by the bleed-off valve spool 20. |
