| 摘要 |
PURPOSE: A 6-way valve device attached to a duplex filter is provided to refine a large amount of fluid without interrupting the filtering operation by selectively activating a pair of filters. CONSTITUTION: A pair of filters(100,100') comprise a fluid inlet part and a fluid outlet part. A valve body(200) comprises a first connection port used as a discharge path, a second connection port used as an inflow path, a third connection port used as another discharge path, a fourth connection port used as another inflow path, and an inlet port(280) and an outlet port(290) for inlet-outlet of fluid. A pair of piston assemblies(400,400') selectively open and close the first and the second connection port by reciprocating between the first and the second connection port and selectively open and close the third and the fourth connection port by reciprocating between the third and the fourth connection port.
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