7
Donaldson Company, Inc.
Standard Equipment
Standard collectors include a fan, motor, control panel,
10-gallon dust container, and an exhaust silencer and
damper. Depending on the type of control selected,
the motor may or may not be pre-wired. Otherwise,
the collector is fully assembled and ready to connect
to electrical supply, compressed air, and ductwork. A
detailed drawing, shipped with each collector, provides
weight, specifications, and collector dimensions
including anchor bolt locations for the collector’s base
plate.
Cleaning Controls
All collectors include standard cleaning controls that are
manually- or timer-controlled depending on the model
and options selected. Controls are available in a variety
of voltages and are available in one of four basic types:
1. Manual push-button with or without motor starter.
2. Downtime cleaning with or without motor starter.
3. Delta P cleaning with or without motor starter.
4. Manual push-button, Delta P, or downtime cleaning
without motor starter in a remote-mount option.
Model DFO 1-1 standard controls include a manual
motor starter that is prewired to the motor and a push-
button valve for pulse cleaning control. Options include
downtime cleaning with or without motor starter and
remote-mount, downtime cleaning without motor starter.
Models DFO 2-2 and DFO 3-3 standard controls include
downtime cleaning without a motor starter. Available
options include downtime cleaning with a motor starter,
remote-mount downtime cleaning without motor starter,
Delta P cleaning with or without motor starter, and
remote-mount Delta P cleaning without motor starter.
All control panels, except remote-mount, are located
inside the collector.
Manual Motor Starter Option
The manual motor starter is the standard option for
Model DFO 1-1 and is not available for other models. It
is prewired to the motor and filter cleaning is completed
using a separate, manual push-button valve located next
to the motor starter.
Downtime Cleaning Option
Primarily used for intermittent duty, light dust-load
applications, the downtime cleaning option provides
automatic, downtime filter cleaning when the collector
is turned OFF. Downtime cleaning WILL occur every time
the collector is shut down. The valves start to pulse one
minute after the collector is shut down and continue
pulsing every 10-seconds for 3 minutes to reduce the
differential pressure.
Downtime cleaning without motor starter is standard for
Models DFO 2-2 and DFO 3-3. The option is specified at
the time of order and available with and without a motor
starter.
Delta P Cleaning Option
Primarily used for continuous duty or heavy dust-load
applications, the Delta P option provides automatic, on-
line filter cleaning. The high- and low-pressure setpoints
initiate the pulse cleaning cycle. The pulse-cleaning
cycle begins when the filter pressure reaches the high-
pressure setpoint. The valves continue to pulse every 10
seconds until the low-pressure setpoint is reached.
The Delta P option is available for models DFO 2-2 and
DFO 3-3 only, with or without a motor starter.
Remote-Mount Cleaning Option
Primarily used in applications that require the cleaning
controls to be located away from a hazardous
environment, remote-mount controls are available with
downtime cleaning and Delta P cleaning options. Remote
downtime cleaning is available for all three models
while the remote Delta P is available for models DFO 2-2
and DFO 3-3 only. This option is specified at the time of
order and the collector is equipped with a 115-Volt AC
NEMA 12 solenoid valve enclosure. Explosion-protected
collectors include a NEMA 9 dust explosion-proof
solenoid enclosure. Contact Donaldson for information
about a NEMA 7 gas explosion-proof solenoid enclosure.
Motor starters for remote-mount cleaning options are
customer-supplied.
