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FabriPulse
®
M
©
2015 American Air Filter Company, Inc. Any use of the text or
images this document contains, without permission of American Air
Filter Company, Inc., is prohibited. FabriPulse, AAF, REDClean,
REDFiltration, and Reliable Efficient Durable are registered
trademarks of American Air Filter Company, Inc. d/b/a AAF
International.
Leaks
Leaking ductwork, access doors, explosion vents, dust discharge devices, or
housing will cause insufficient suction at the pick-up point. Seal any leaks.
Closed air passages
Clogged ducts, closed dampers, or closed gates will shut off the air flow.
Undersized ducts
Undersized ducts will create excessive pressure losses for which the fan may
not have been sized. Duct size should be reviewed considering the design
specifications and fan selection.
13.4
Fabric Bag Problems
Temperature
Operating temperatures should not exceed specified maximum of the bag
material.
Humidity
High humidity will create blinded bags which results in excessive differential
pressure. Run the cleaning mechanism with the fan off and program timer
on to release the dust cake. If condensation is a recurring problem, pre-
processing warm-up and post-processing purge periods of 15 to 30 minutes
each may help. Exterior insulation may also be necessary. Sources of
moisture may come from leaky process ductwork, moisture in the process
gas stream, or moisture in the compressed air system.
Dust characteristics
Each bag material is selected for specific physical and chemical
characteristics which are compatible with the gas stream composition and
temperature.
Contact AAF International for assistance on a bag design for your
application. It is recommended that you use only AAF International bags on
AAF International equipment.