PROBLEM TO BE SOLVED: To automatically solve air trouble.;SOLUTION: An inlet 4, a valve chest 3 communicated from the inlet 4, an outlet passage 8 communicated from the valve chest 3 through a valve port 9, and an outlet 5 communicated from the outlet passage 8 are formed on a trap casing composed of a body 1 and a cover 2. A float 11 for opening and closing the valve port 9 is disposed in the valve chest 3 in a free state. A bypass passage 12 communicating the valve chest 3 with the outlet passage 8 is formed in the body 1 and the cover 2. A ball valve 14 provided with a horizontal T-shaped opening 13 for opening and closing the bypass passage 12, is rotatably disposed on a horizontal portion of the bypass passage 12. An exhaust passage 20 joining to the ball valve 14 of the bypass passage 12 in the vertical direction from the valve chest 3, is formed on the body 1. A vertically-upward opening 21 communicating the exhaust passage 20 with the T-shaped opening 13 is formed on the ball valve 14. A temperature reactive valve 26 for opening and closing the exhaust passage 20 is disposed in the valve chest 3.;COPYRIGHT: (C)2014,JPO&INPIT
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