| 摘要 |
PURPOSE:To surely perform the changeover operation by positioning a low pressure port connected to the intake side of a compressor between the first and second supply ports. CONSTITUTION:In a valve body 1, a low pressure port 3 connected to the intake side of a compressor 6 is positioned between the first supply port 4 and the second supply port 5. The low pressure port is constituted in such a way as being always closed by a slide valve body 12. To the slide valve body 12, high pressure is applied from the inside of the valve body 1 and low pressure is applied from the side of the low pressure port 3, thereby pressing force to the side of the low pressure port 3 is always applied to the slide valve body 1. As a result, even in the case that anbalance force is applied to the slide valve body 12, the slide valve 12 can be maintained in a suitable posture.
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