| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve device in which no leakage occurs even if any foreign matter is bitten in between a valve element and a valve seat. <P>SOLUTION: The valve device includes: a valve element 3 which is housed freely movable linearly to one side and the other side in an axial direction within a flow passage 2; and a flow passage forming member 4 which forms the flow passage 2 and includes a first valve seat 14 where the valve element 3 is seated when linearly moves to one side in the axial direction, and a second valve seat 15 where the valve element 3 is seated when moves linearly to the other side in the axial direction. The valve element 3 closes the flow passage 2 even when seated in any one of the first and second valve seats 14 and 15. Thus, e.g., if any foreign matter is bitten in between the second valve seat 15 and the valve element 3, the flow passage 2 can be closed by seating the valve element 3 in the first valve seat 14. As a result, even if any foreign matter is bitten in between the second valve seat 15 and the valve element 3, the occurrence of leakage can be prevented. <P>COPYRIGHT: (C)2013,JPO&INPIT |
