| 摘要 |
PROBLEM TO BE SOLVED: To reduce the loss of the gas pressure from a gas cylinder to be frequently opened and closed by providing plural branch passages from a pressure reducing valve body in relation to a pair of pressure control valves. SOLUTION: Plural, for example two, branch passages 9a, 9b are provided in relation to a pair of pressure control valves. Furthermore, these two branch passages 9a, 9b can be formed into a different shape. Two branch passages 9a, 9b can be provided in parallel with each other and close to each other in a conventional size valve casing by using the branch passages 9a, 9b having a different kind of shape from each other. Multiple branch passages can be provided in a narrow space by the similar method. With this structure, since the number of branch passage for communicating a pair of pressure control valves with the pressure reducing valve body 4 is increased, flow passage resistance in the branch passages 9a, 9b is increased, and even if a tap of a cylinder is frequently opened and closed, loss of the gas pressure can be restricted.
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