| 摘要 |
PROBLEM TO BE SOLVED: To drain a large amount of low temperature condensed water 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. Disk- shaped bimetals 14, 7 are mounted in a front step part of the orifices 5, 6. A plurality of through holes 14, 15, 16, 17 are provided in the disk-shaped bimetals 14, 7. The disk-shaped bimetal 14, 7 are deformed into circular arc shape as shown in the drawing at low temperature time to discharge a large amount of low temperature condensed water and deformed into flat plate shape, when a prescribed high temperature is generated, to reduce a passing area of the orifices 5, 6. Steam passing the orifice 5, by colliding against the disk- shaped bimetal 7 and a plate-shaped part of an orifice member 11 in the following step, is prevented from passing through the through hole 17 and the orifice 6, and a leak of the steam can be prevented.
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