| 摘要 |
A pilot-type change-over valve which includes a main valve segment, a poppet-type amplifying pilot valve that switches the main valve segment by use of a pilot fluid, and a solenoid pilot valve that switches the amplifying pilot valve by use of the pilot fluid. The use of the amplifying pilot valve whose capacity is larger than that of the solenoid pilot valve and corresponds to that of the main valve segment permits switching the large-capacity main valve segment with the small solenoid pilot valve with small power requirement.
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