| 摘要 |
PURPOSE:To enable a remote control with high responsiveness in a switch valve having a pilot device by disposing an auxiliary fluid chamber on the side opposite to the pilot device which slidably displaces the valve body and communicating said chamber to a single inlet and outlet port. CONSTITUTION:A spool 7 is inserted slidably in the axial direction in a valve body 6 having a suction port 1, first and second inlet-oulet ports 2, 3 and first and second drain ports 4, 5. Said spool 7 is slidably displaced by a pilot device 10 which is fixed on the right hand end of the valve body 6 to switch the flow passage. A cap 19 is fixedly attached to the left hand side of the valve body 6, and an auxiliary air chamber 20 is formed by said cap 19. The auxiliary air chamber 20 is communicated to a spool hole 21 that guides an end 9 of the spool 7, and the spool end 9 is resiliently biased to the right by a bias spring 23 inserted in a spring guide 22 which is housed in the auxiliary air chamber 20. The auxiliary air chamber 20 is communicated to an inlet-outlet port 3 via a throttle valve 26. |
