4
Downflo Workstation, DWST 4-1 to 6-4
3 Operation
During normal operation, the power module containing the blower draws dust-laden air from the work space through the filter
cartridges. Dust collects on the outside surface of the filters. Clean, filtered air flows through to the center of the cartridge, through
the clean-air plenum and into the blower silencer plenum. Filtered air exits through the top of the cabinet.
Filter cleaning is completed using pulse-jet technology. A solenoid valve controlled by a solid-state timer and a diaphragm valve
aligned to each filter provides the pulse cleaning. The diaphragm valve sends a pulse of compressed air through the filter cartridge
from the inside out and collected contaminants fall into the dust drawers. At the end of each pulse, the diaphragm valve closes and
the filter cartridge resumes normal operation. One filter cartridge is cleaned per pulse.
Electrical work during installation, service or maintenance must be performed by a qualified electrician and comply
with all applicable national and local codes.
Turn power off and lock out all power before performing service or maintenance work.
Turn compressed air supply off, bleed and lock out lines before performing service or maintenance work.
Check that the collector is clear and free of all debris before starting.
Do not install in classified hazardous atmospheres without an enclosure rated for the application.
Collector Operation
clean air outlet
silencer
plenum
fan blower
dirty-air
inlet
filter
cartridges
dust
drawers
filter clean
purge
Filter during pulse cleaning
