| 摘要 |
<p>A pilot-type change-over valve 1 comprises a main valve segment 2, a poppet-type amplifying pilot valve 4 that switches the main valve segment 2 by means of a pilot fluid, and a solenoid pilot valve 3 that switches the amplifying pilot valve 4 by means of the pilot fluid. The use of the amplifying pilot valve 4 whose capacity is larger than that of the solenoid pilot valve 3 and corresponds to that of the main valve segment 2 permits switching the large-capacity main valve segment 2 with the small solenoid pilot valve 3 with small power requirement. <IMAGE></p> |
