| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a liquid outflow preventing valve device to reduce height, prevent liquid from not flowing in a flow passage, and prevent logging of the inflow port of a relief valve with dust. SOLUTION: In this liquid outflow preventing valve device, the outflow port 18 of a relief valve R communicates with an outflow port 4 with a nipple part 7 is parallel to form a flow passage communicating with the outflow port 4 formed in the upper part of a cut-off valve C. In this case, the nipple part 7 is arranged throughout a range of from the upper side of the cut-off valve C to the side wall of the cut-off valve C, and the relief valve R is disposed at the side wall of the cut-off valve C. The inflow port 18 is positioned at a topmost part and opened toward the upper side. A cover cylinder 19 to cover the inflow port 18 is provided and the diameter of the opening of the cover cylinder 19 is reduced to a value lower than the diameter of the inflow port 18.</p> |
