| 摘要 |
In a solenoid on-off valve 20, a main valve body 22 is provided to be displaceable with respect to a housing having a valve passage 55. A seat member 25 is provided at the main valve body 22. The seat member 25 is pressed on a valve seat 34, which divides the valve passage 55 into a primary space 56 and a secondary space 57, to close the valve passage 55. A pilot valve body 23 is coupled to the main valve body 22 so as to be relatively displaceable with respect to the main valve body 22. The pilot valve body 23 is configured to be displaced by an electromagnetic force of an electromagnetic drive unit 24. Further, the solenoid on-off valve 20 is configured such that: the seat member 25 includes a pilot passage 40 connecting the primary space 56 and the secondary space 57; and the pilot valve body 23 is pressed on the seat member 25 to close the pilot passage 40.
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