| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermally-actuated steam trap capable of quickly discharging a great amount of low-pressure condensed water. SOLUTION: Covers 4, 5 are tightened to a body 3 having an inlet 1 and an outlet 2 to form a casing, and a valve chest 6 and a valve seat storage chamber 7 are formed between the body 3 and the cover 4 and between the body 3 and the cover 5, respectively. The valve chest 6 and the valve seat storage chamber 7 are communicated with each other via an opening 10 having a large passage area. A valve seat 15 having a valve hole 13 communicating between the valve chest 6 and an outflow passage 12 is arranged in the valve seat storage chamber 7 so as to be movable forward and backward. An inlet chamber 16 communicating from the inlet 4 via a communication passage 9 is formed on the back of the valve seat 15, and spring 17 is arranged in the inlet chamber 16. The spring 17 operates valve opening force for the valve seat 15 to open the opening 10 having the large passage area. The valve seat 15 opens the opening 10 having the large passage area during a low pressure and closes the opening 10 during a high pressure. A thermally-actuated element 19 is arranged in the valve chest 6. The thermally-actuated element 19 opens/closes the valve hole 13 during a high pressure when the valve seat 15 closes the opening 10.
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