| 摘要 |
A filter system and method are provided utilizing a filter tank (14) separated into an inlet compartment (17) and a filtrate compartment (18) by a filter media (22). Under normal filter operation, the liquid to be filtered enters the inlet compartment and is passed through the filter media and out the filtrate compartment by a pressure differential created across the filter media by a pump device (42). When the need arises to move the filter media as a result of the build up of contaminants on it, it is necessary to alleviate the pressure differential across the filter media. Such pressure differential is alleviated by the controlled flowing of filtered liquid through an orifice (104) in a closed valve (52) into the filtrate compartment. |
