| 摘要 |
The instant invention provides a fluid supply system, wherein in its working mode a pump delivers fluid through a filter in one direction to a discharge outlet, an improvement comprising a relief outlet and controlled valve means interposed between said pump and said discharge outlet and between the pump and the relief outlet, means for selectively controlling said controlled valve means (1) to effect delivery of fluid from said pump through said filter, in the one direction, and through said valve means to said discharge outlet in the working mode, (2) to effect passage of fluid from said pump through said filter, in a direction opposite to the one direction, and through the valve means to said relief outlet in reverse cleaning mode and (3) to effect passage of fluid from said pump through said filter, in the one direction, and through the valve means to said relief outlet in forward cleaning mode. |
