AEC VacTrac Series Conveying Systems - Manual (Page 48)

Page 48 VacTrac™ Series Conveying Systems
WH2-605A.4 Mechanical Components
Figure 20
Typical Material Check Valve
3-10 Installing VFC or FC Filter Chambers
The VacTrac filter chamber protects the vacuum pump from
damage caused by material carry-over. Primary system filtration
occurs in the filter chamber, not in the vacuum receivers. This
reduces maintenance of vacuum receiver filters atop processing
machines.
A vortex created in the filter chamber separates carry-over from
the air stream and a cartridge-type filter catches any dust and fines
drawn into the upper chamber.
At the end of the conveying cycle to all on-line vacuum receivers,
the VacTrac dump delay cycle occurs. Atmospheric air from the
vacuum line is introduced to the filter chamber, equalizing the
pressure inside the filter chamber. The material discharge flapper
valve falls open and dumps the fines and dust collected during the
conveying cycle.