AEC VacTrac Series Conveying Systems - Manual (Page 31)

VacTrac™ Series Conveying Systems Page 31
Mechanical Components WH2-605A.4
ACA Series Filter Chambers
Function
Powders or granular materials with fines can cling to filters and
contaminate operating components. The ACA Series filter chamber
is a self-cleaning filtration unit that enables such materials to be
conveyed.
Operation
During material conveying, fines accumulate on the outside of the
filter media as the air passes through a filter bag. These fines must
be periodically removed to prevent performance losses in the
conveying system. The ACA Series filter utilizes a plant-based
compressed air supply to clean filter bags with intermittent air
pulses.
At preset time intervals, a solenoid valve activates, interrupting
continuous compressed air flow to the unit. This interruption
causes an exhaust valve to open, allowing stored compressed air
from an accumulator to be released down inside the filter bag. This
momentary burst of air stops the flow of dust-laden air through the
filter bag and flexes the filter fabric. This along with the reverse
flow of air, causes the accumulated dust to fall off the bag and
back into the hopper for discharge.
This instantaneous cleaning action of air pulses are directed to each
individual filter bag in sequence and at a specified duration. You
can adjust the time between air pulses; different conveying rates
and materials require different air pulse times. Air pulses must
occur more frequently with increased dusting conditions. Since
filter cleaning action is directed to an individual filter bag,
remaining filter bags are on-stream, continually filtering conveying
air.