| 摘要 |
PROBLEM TO BE SOLVED: To provide a selector valve for high temperature fluid capable of maintaining the sealing performance of a seal member mounted on a valve element abutting to or separate from a valve seat. SOLUTION: The selector valve comprises a first valve seat 18 with a first valve hole 23 formed at the center for making first and second ports 11 and 12 communicate with each other, a second valve seat 17 with a second valve hole 24 formed at the center for making second and third ports 12 and 13 communicate with each other, the valve element 14 abutting to or separate from the first valve seat 18 and the second valve seat 17, a piston 20 for driving the valve element 14, or the like. The valve element 14 has a first seal member 15 made of expanded graphite to be set without gap in a first annular groove 14c formed at a position opposite to the first valve seat 18, and a second seal member 16 made of expanded graphite to be set without gap in a second annular groove 14d formed at a position opposite to the second valve seat 17. COPYRIGHT: (C)2004,JPO
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