| 摘要 |
<p>The filter system for cleaning a medium with double filter has a cartridge-type hydraulically operated 3/2 directional control valve (13) for switching the filter from filtering operation to back-flushing operation. A common valve and filter housing has pump and filter ports (5,22), and a back-flushing outlet (7) which consists of radial bores (23) with a diameter which is larger than radial bores (18) leading into the inlet chamber (19). A pilot pressure port (26) for the filtering function and a pilot pressure port (29) for back-flushing function and pressure relief are also provided.</p> |
