| 摘要 |
PROBLEM TO BE SOLVED: To prevent the clogging of an orifice, and decrease the leak of steam. SOLUTION: In a valve chamber 3, a plurality of orifices 5, 6 are arranged by eccentrically placing the respective center axes of the orifices 5, 6. Rolling members 7, 12 are arranged capable of rolling in the orifices 5, 6. Steam passing the orifice 5, by colliding against a plate-shaped part of an orifice member 11 in the following step, is prevented from passing through the orifice 6, and a leak of the steam can be prevented. In the case that a fluid passes through the orifices 5, 6, by rolling the rolling members 7, 12, foreign matter is prevented from being deposited by sticking in the orifices 5, 6.
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