| 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 between the spray hole 9 and the annular groove and an outer ring valve seat 10 on the outer circumference of the annular groove 8. 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. A seal ring 12 which is slidably moved on an outer circumferential wall of the outer ring valve seat 10 is disposed on the outer circumference of the outer ring valve seat 10, 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 outer circumference of the outer ring valve seat and a lower side of the seal ring 12.
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