| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of assembly error of a seal element by cooperating a shuttle valve with a pneumatic direction switching valve of a pilot control type. SOLUTION: A direction switching valve 10 is cooperated with a shuttle valve 30 for connecting a pressure medium communicating passage between at least two pilot control passages 32, 34 and a control passage 38 communicated with a pilot control device 22 through a closing device 36, the pilot control passages 32, 34 for leading control pressure are automatically communicated with the control passage 38 regardless of an assembling position and a pressure medium supplying system by the closing device 36, and simultaneously, the pilot control passages 32, 34 which are not necessitated for leading control pressure are closed.
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