| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk type steam trap which does not discharge any fluid in a variable pressure chamber until an auxiliary valve disk is separated from an inner ring valve seat. SOLUTION: The variable pressure chamber 3 is formed by fixing a lid body 2 to a body 1 having an inlet 4 and an outlet 5. A spray hole 6 opened at the center of the variable pressure chamber 3 is made to communicate the inlet 4 with the variable pressure chamber 3. An annular groove 8 is formed in the outer circumference of the spray hole 6 to form an inner ring valve seat 9 and an outer ring valve seat 10. A disk-like valve disk 11 which is attached/detached to/from the inner ring valve seat 9 and the outer ring valve seat 10 to open a valve is disposed in the variable pressure chamber 3 in a free moving state. An auxiliary valve disk 14 which is attached/detached to/from the inner ring valve seat 9 is fitted to the center of a lower side of the valve disk 11. A seal ring 12 which is slidably moved on an outer circumferential wall of the annular groove 8 is disposed on the annular groove 8, and a ring-like corrugated spring 13 as an elastic member to slightly protrude an upper end of the seal ring 12 from the inner ring valve seat 9 and the outer ring valve seat 10 when the valve disk 11 is opened is disposed between a bottom wall of the annular groove 8 and a lower side of the seal ring 12.
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