| 摘要 |
<p>PURPOSE: To dispense with a spring by forming a connection path by a closing part in co-operation with a second valve seat mounted on a rammer in a non- current-carrying state of the valve, and forming a connection path of a connecting part communicated with a connection part of a consumer through a valve member separated from a first valve seat in a current-carrying state of the valve. CONSTITUTION: A valve is formed by mounting a valve member 16 co-operatable with a first valve seat 17, separating the valve member 16 from the first valve seat 17 by a needle 28 against the pressure of a pressure medium, and forming the connection parts 13, 14. A closing part 24 is co-operatable with a second valve seat 23, and a connection path of the second valve seat 23 and a return connection part 43 is formed in an electroless state of the valve. The connection path of the connection parts 13, 14 is formed from a feed part 18 through the valve member 16 separated from the first valve seat 17 in an energized state of the valve. As a result, the self-sealing action can be obtained and a spring becomes unnecessary.</p> |
