| 摘要 |
PROBLEM TO BE SOLVED: To provide a slow return check valve that is superior in contamination property and easily adjusts a flow rate.SOLUTION: A slow return valve 1 comprises: an outer valve body 2 having a first port 6 and a second port 7; an inner valve body 3 fitted in a storage chamber 8 formed in the outer valve body 2; and a valve body 4 movably fitted in the inner valve body 3 to open and close a valve path 17. The slow return valve is configured such that an annular clearance 9 serving as a throttle is provided between an inner peripheral surface of the storage chamber 8 and an outer peripheral surface of the inner valve body 3 in such a state that the clearance has a length in an axial direction, and also, communication oil paths 10-13 for communicating the annular clearance 9 with the first port 6 and the second port 7 are provided, so that when oil flows from the second port 7 to the first port 6, the flow of oil via the valve path 17 is blocked and the flow rate is restricted by the annular clearance 9. |
