Donaldson Torit DFO 2-4, Installation And Operation Manual

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Combustible materials such as buffing lint, paper, wood, metal dusts, weld fume, or flammable
coolants or solvents represent potential fire and/or explosion hazards. Use special care when
selecting, installing, and operating all dust, fume, or mist collection equipment when such combustible
materials may be present in order to protect workers and property from serious injury or damage due to a
fire and/or explosion.
Consult and comply with all National and Local Codes related to fire and/or explosion properties of
combustible materials when determining the location and operation of all dust, fume, or mist collection
equipment.
Standard Donaldson Torit equipment is not equipped with fire extinguishing or explosion protection systems.
1
Donaldson Company, Inc.
Description
The Downflo Oval, Models DFO 2-4 and DFO 3-6 are
continuous-duty dust collectors with oval, cartridge-
style filters. The downward airflow design delivers high
filtration efficiency while using less energy. Continuous-
duty means no downtime. The filters are pulse-cleaned in
sequence, one set
at a time, without turning the unit off. Model DFO 2-4 is
two filters wide by two filters high by one filter deep and
Model DFO 3-6 is two filters wide by three filters high by
one filter deep.
Designed to increase the versatility of the unit, standard
options include top, front, and abrasion-resistant inlets,
HEPA and ASHRAE afterfilter packs, Checker board
control panel, and various dust removal options.
Purpose and Intended Use
Downflo Oval collectors are widely used on nuisance
dust where the load to the collector is less than 2
grains per cubic foot. Some typical applications include
abrasive blasting, grinding, pharmaceuticals, powder
paint applications, sand handling, and welding. Each
application is different and selecting the correct filter
cartridge for the application and type of dust collected is
important.
• For all ambient, extremely fine, and non-fibrous dust,
use Ultra Web
®
filter cartridges which offer high
efficiency and performance on fine particulate.
• For fibrous dust, use a cartridge with an open-pleat
design, such as Fibra-Web
®
.
• Operations involving high temperature and high
humidity may require special attention. Temperature,
moisture content, and chemistry issues may require
custom collector design. Appropriate cartridge
options are available from Donaldson Torit.
• Hygroscopic dust such as fertilizer, salt, and sugar
should be handled under a controlled, low humidity
environment. Contact Donaldson Torit for filter
cartridge selection.
• Flammable or explosive dust may require custom
collector design options and special cartridges.
Contact Donaldson Torit for design assistance.
• Applications with high hydrocarbon or high oil
content may require special treatment or filter media.