| 主权项 |
1. A valve comprising:
a valve disc that partitions one chamber and another chamber; and annular-plate shaped leaf valves laminated on each of the one chamber side and the other chamber side of the valve disc, wherein the valve disc includes:
an annular boss formed at each of the one chamber side and the other chamber side to support the leaf valves;a seat formed on an outer peripheral side of the boss on each of the one chamber side and the other chamber side, the leaf valves being left from/seated on the seats;an opening surrounded by each of the seats;one passage that allows the one chamber to communicate with the opening at the other chamber side; andanother passage that allows the other chamber to communicate with the opening at the one chamber side, at least one of the seats on the one chamber side and the other chamber side is disposed to project with respect to the bosses, an outer peripheral end of the seat on the one chamber side is disposed on an outer peripheral side with respect to an outer peripheral end of the seat on the other chamber side, and the valve disc includes an auxiliary seat formed on an outer peripheral side of the seat on the other chamber side, the auxiliary seat being disposed at a height identical to the seat on the other chamber side, alternatively, the auxiliary seat projecting with respect to the seat on the other chamber side. |
