| 摘要 |
<p>In a three-way valve pressure chambers P1, P2 of pistons 3, 16 for urging a first main valve M1 in valve-closing direction by a spring 8 and a second main valve M2in valve-opening direction against a spring 13 are connected via a pilot valve and a pressure passage 25 to a medium-pressure port B. When the pilot valve is open, the pressures in the pressure chambers into which via an orifice 6 high-pressure is introduced from a high-pressure port A escape to the medium-pressure port B. The piston 3 opens the first main valve. A plug 10 is urged by the spring 13 to close the second main valve. When the pilot valve is closed the piston 3 closes the first main valve by the spring 8, and the piston 16 opens the second main valve. The pilot valve is a two-way solenoid valve. The pressure passage 25 is formed within the valve body 1. <IMAGE></p> |
