| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact valve device which secures a sufficient lead-out flow rate even in a range close to a predetermined pressure at which a content of a container is maintained, and to provide a conduction direction restriction valve mechanism body attached to the valve device.SOLUTION: A composite valve cassette 100, which is attached to an outlet internal secondary side passage 400 formed in an area closer to the outlet 40 side than an intermediate transmission tool in a passage, includes: a decompression valve assembly 200 which is disposed so as to move forward and rearward and retreated by a pressure of a gas; a first coil spring 210 which biases the decompression valve assembly 200 in a retreat direction; a check valve 110 which is disposed so as to move forward and rearward relative to the decompression valve assembly 200 and retreated by the pressure of the gas; and a second coil spring 220 which biases the check valve 110 in an advance direction. A gas introduction passage H, which establishes continuity with the decompression valve assembly 200 so that the gas acts in the advance direction, is formed. |
