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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.
Static Electricity
Static electricity build-up can cause a high differential pressure. Increase the
humidity if possible, using discretion to avoid creating condensation.
Grounded bags may also be required. Static electricity can also start a fire or
dust explosion inside the collector.
Collector overloads
Too much air or too much dust will create high differential pressures across
the collector. Check the fan speed, system design, pre-cleaners, and the
damper position. Also be sure the dust load and air volume are those the
system was designed to handle.
13.2 Visible Discharge
Improperly installed or damaged bags
Check for holes or rips in bags. Replace damaged bags with AAF replacement
bags. Reseal bags as necessary.
Improper sealing of the header
Vacuum dust from the clean air side of the collector. Inspect the header
seal. Clean or replace the seal if it is damaged.
Insufficient dust cake
The unit could be pulsing too often resulting in over cleaning. Check to see if
the differential pressure is at least 3”. Increase pulse interval until the unit is
operating stably at 3” differential pressure minimum. DO NOT ADJUST
PULSE DURATION WITHOUT CONSULTING AN AAF REPRESENTATIVE.
13.3 Insufficient Hood Control
Incorrect fan rotation
The incorrect rotation of the fan will not provide the system static pressure
or air volume required.
Fan V-belt slippage
Tighten the V-belts if necessary. Replace broken or stretched belts.
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