| 摘要 |
An up-wash, up-flow filter has an arrangement to hold the filter media in position during filtering but to allow the media to rise during washing.
<??>In order to hold the filter media firmly against the pressure of upward flowing liquid during filtering, an imperforate diaphragm (20) is provided movable between an applied position and a released position by pressurised fluid supplied by an inlet (42) located above the diaphragm. The filter housing (12) is flared upwardly and outwardly to allow a greater range of sizes of filter media. |
