Filter and sorbent cartridge

Details Filter and sorbent cartridge Filter and sorbent cartridge

B - Operations, Transporting

01

D

150/22, 183/37

B01D 53/04 (2006.01)

Patent

CA 1038305

ABSTRACT A filter cartridge for removing a liquid contaminant such as an oil dispersoid from a gaseous fluid such as compres- sed air comprising a bed of sorbent medium disposed between inner and outer rigid tubes formed of glass microfibers. The inner tube acts as a first filtering stage by condensing or coales- cing a majority of the dispersoid contaminant from the gas, and the outer tube acts as a polishing filter for removing most of any contaminant not removed by the inner tube and the bed of sorbent medium. The filter cartridge can optionally provide a progres- sive color change indication toward the end of its useful life through the use of a dye substance disposed in the bed between the inner and outer fiber tubes. As the bed of sorbent medium be- comes substantially saturated with liquid contaminant such con- taminant is colored by the dye and begins to progressively pene- trate through the outer tube to provide a progressive color change which is visible before the filtering effectiveness of the cartridge is seriously impaired.

221433

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