5
Donaldson Company, Inc.
Collector Operation, WSO 25-4 shown
During normal operation, contaminated air enters the collector through one or both dirty-air inlets located on each side, toward
the bottom of the collector. The incoming air slows and turns upward, causing large mist droplets and particles to fall out of the air
stream and into the hopper. The air passes through a reusable first-stage filter designed to collect and coalesce large droplets and
particles.
The primary stage of filtration is the pleated filter cartridge specifically designed to collect, coalesce, and drain fine mist. As the
mist coalesce, the droplets are big enough to run down the cartridge and drain back into the collector. The droplets will drain on
both the inside and outside of the cartridge. Liquid that collects on the inside of the cartridge drains through the bottom portion of
the porous media and into the hopper. Clean, mist-free air exits the cartridge and discharges through the top of the collector.
optional afterfilter
primary filter cartridge
first-stage filter
P-trap (drain)
clean-air outlet
fan
clean-air plenum
coalesced
large droplets
dirty-air inlet
3 Operation
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.
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.
