| 摘要 |
PROBLEM TO BE SOLVED: To improve durability of a relief device.SOLUTION: In a valve case (1), a first relief valve chamber (3) of a main relief valve (10) and a second relief valve chamber (7) of an auxiliary relief valve (11) are formed in series. The first relief valve chamber (3) has a right-side valve seat chamber (4) and a left-side valve chamber (5). In a valve seat member (18) of the valve seat chamber (4), a first valve member (30) in the valve chamber (5) is energized by a first relief spring (40). A second valve member (48) in a second relief valve chamber (7) is energized to a second valve seat (47) by a second relief spring (50).SELECTED DRAWING: Figure 1 |
