| 摘要 |
PROBLEM TO BE SOLVED: To provide a disc type steam trap in which a valve disc surely contacts an inner ring valve seat and an outer ring valve seat closely. SOLUTION: A variable pressure chamber 3 is formed by fixing a lid 2 to a body 1 having an inlet 4 and an outlet 5. A jet hole 6, which is opened at the center of the variable pressure chamber 3, is provided to communicate an inlet 4 and the variable pressure chamber 3. An annular groove 8 is opened in the outer circumference of the jet hole 6 and an inner ring valve seat 9 is formed between the jet hole 6 and the annular groove 8. An outer ring valve seat 10 is formed on the outer circumference of the annular groove 8 and a discharge hole 7 is provided from the annular groove 8 to communicate the variable pressure chamber 3 and the outlet 5. The valve disc 11 in a disc shape, which sits on or separates from the inner ring valve seat 9 and the outer ring valve seat 10, is arranged in the variable pressure chamber 3. One end of a bellows 12 is fixed to the inner ring valve seat 9, while a movable inner ring valve seat 13, which forms the jet hole 6, is fixed to the other end of the bellows 12, so that the expansion and contraction of the bellows 12 displace upward the movable inner ring valve seat 13 from the outer ring valve seat 10. COPYRIGHT: (C)2011,JPO&INPIT
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