4.8
Filter Cleaning (Permanent Type)
4.8.1
How to Clean: Under ordinary conditions, filters may be readily cleaned with water. A garden hose with a
pressure nozzle and water pressure of 30 to 40 psig is satisfactory. Do not direct the stream of water through
the dirty side of the filter. This will drive the dirt into the filter. Direct the water stream through the filter in a
direction opposite to the air flow.
4.8.2
Cleaning Materials When dirt loads are heavy or tenacious, or where a considerable number of filters ar
e
involved and economy demands a faster cleaning operation, the filters should be presoaked in a cleaning
solution. Recommendation of the exact material to use should be obtained from a manufacturer of cleaning
products.
WARNING ------------- WARNING ------------- WARNING
ALLOF THE CLEANING SOLUTIONS SHOULD BE THOROUGHLY WASHED OUT OF THE
FILTERS WITH FRESH WATER. DO NOT USE ALKALINE CLEANING SOLUTIONS OR
SOLVENTS, AS FILTERS HAVE A PROTECTIVE FINISH WHICH SHOULD NOT BE
REMOVED.
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