Downflo Oval
Proven Design Delivers Value & Performance
The high performance Downflo® Oval (DFO) family of dust collectors provides up to 25% more filtration capacity than other same-sized cartridge collectors.
Video: Donaldson DFO Downflo® Oval
The high performance Downflo® Oval (DFO) family of over-achieving dust collectors provides up to 25 percent more filtration capacity than other same-sized cartridge collectors. Powered by proprietary Ultra-Web® nanofiber filtration technology, DFO delivers cleaner air, up to two times longer filter life, and greater cost savings.
Downflo® Oval -DFO Cartridge Dust Collector
The Donaldson Torit® Downflo® Oval cartridge dust and fume collector sets the standard for industrial dust collection – by providing a 25% increase in airflow capacity, improved airflow path, and a 29% increase in pulse cleaning pressure. These compact, high-efficiency units use high efficiency oval-shaped cartridge filters, especially well-suited for filtering the sub-micron dust.
A Family of Over-Achievers
The high performance Downflo Oval (DFO) family of dust collectors provides up to 25% more filtration capacity than other same-sized cartridge collectors. Powered by proprietary Ultra-Web® fine fiber filtration technology, DFO delivers cleaner air, up to two times longer filter life, and greater cost savings.
A smaller collector helps lower the initial purchase price, reduces filter replacement costs and opens up valuable manufacturing floor space.
Features
- Lower initial cost per cubic meter of air per hour (m3/h) / cubic foot of air per minute (cfm)
- Higher efficiency—cleaner air
- Lower pressure drop—greater energy savings
- Fewer filter changeouts
- Reduced filter disposal cost
- Easy system setup
- Less maintenance
Benefits
DFO collectors offer some strong benefits that distinguish them from all other collectors available in the market today.
Easy to Use
Quick-release handles provide easy cover removal and faster filter access.
Compact
Smaller footprints for applications that require maximum cleaning efficiency in even smaller spaces.
Powerful
DFO collectors provide 25% more capacity than same-sized dust collectors.
Cost Effective
The proprietary ExtraLife Filter Cleaning System averages up to 30% increase in pulse cleaning energy for unmatched cleaning ability.
Innovative
Unique Oval-Shaped Filter Design
The Downflo Oval filter design is a reflection of Donaldson Torit’s commitment to technical research and development. High performance oval-shaped filters handle up to 25% more airflow without increasing velocities, which can cause filter abrasion. Sophisticated FLUENT® Airflow Modeling Software revealed that oval-shaped cartridge filters have fewer areas of high velocity, resulting in a lower potential for media abrasion and increased filter life.
Standard Collector vs. Oval Collector Filter Airflow Models
Standard Collector
Downflo® Oval Collector
Airflow Breakthroughs Lead to Higher Filtration Efficiency
Sophisticated computer modeling for fluid dynamics, structural mechanics and acoustics puts DFO models 1-1, 2-2, and 3-3 in a technical class all their own. The illustration below (left) shows how FLUENT Flow Modeling Software enhanced the uniform air velocity distribution through model DFO 3-3. ANSYS® Structure Analysis Software shown below (right) demonstrates lowest stress levels and deflections for model DFO 3-3 under typical operating pressures.
FLUENT Flow Model
Structure Analysis Model
Convex Side Walls
Technical discoveries improve filtration performance and prolonged filter life. A new cabinet design with convex side walls streamlines the airflow path and increases the cabinet’s cross-sectional area. The convex side walls provide more space between filters, lower cabinet velocities and reduce the potential for media abrasion.
Cross-Sectional Area of Collector Dirty Air Plenum
Pulse Cleaning Technology
ExtraLife Filter Cleaning System uses proprietary, computer-modeled pulse cleaning technology to easily “pulse off” dust from the surface of the filter, improving filtration efficiency and prolonging filter life. The red lines in the illustration show the increased pressure at the front of the Downflo filter generated by the ExtraLife system. The blue line shows the pulse signature of a standard cartridge collector.
Pulse gradients produced by the standard Downflo during pulse cleaning compared to gradients produced by a Downflo with the ExtraLife Cleaning System (red).
IoT Enabled with iCue™ Connected Filtration Service
This collector* is now enabled with Donaldson’s iCue™ connected filtration monitoring service. Designed to remotely monitor a facility’s dust collection equipment and provide operational insights directly to end-users, this information can help manufacturers reduce unplanned downtime, support efficient maintenance and operation, and automatically capture compliance data.
* may not be available on all models
Resources
Product Literature
Brochure
Filter Guide
Manual
DFO 1-1 to 3-3
Manual
DFO 2-8 to 4-128
Manual
DFO 2-4 and 3-6
Related Technical Articles & Case Studies
Key Industries
Videos
Ultra-Web Technology Provides Filters that Deliver
Downflo Oval DFO Filter Changeout Industrial Dust Collection Technology
Standard & Optional Features
DFO 1-1, 2-2, 3-3
| Collector Design | Standard | Optional |
|---|---|---|
| Mild Steel Construction |  |
|
| Integral High Performance Power Packs | |
|
| Ledge-Free Hopper | |
|
| Inlet | |
|
| Sprinkler Taps | |
|
| ExtraLife Filter Cleaning System | |
|
| Quick-Removal Access Covers | |
|
| Integral Exhaust Silencer | |
|
| Airflow Damper | |
|
| Stainless Steel Construction | |
|
| Explosion Protected Models | |
|
| High Static Power Packs | |
|
| Inlet Damper | |
|
| Abrasion Resistant (AR) Inlet | |
|
| Sprinkler Heads | |
|
| Extraction Arms (7, 10, 14) | |
|
| Caster Packs | |
|
| Bag-Out Kit (Filter & Discharge) | |
|
| Bag-In/Bag-Out Kit (Filter & Discharge) | |
| Cartridge Filters | Standard | Optional |
|---|---|---|
| Ultra-Web (MERV* 15) | |
|
| Ultra-Web SB (MERV* 15); Ultra-Web AS (MERV* 15); Fibra-Web (MERV 14); Ultra-Tek (MERV 12); Thermo-Web (MERV 14); Torit-Tex (MERV 16) | |
|
| HEPA/ASHRAE Afterfilters | |
| Paint System | Standard | Optional |
|---|---|---|
| Electrostatically applied powder coat TGIC polyester texture finish (2-mil dry film thickness) inside and out. Paint system passed 350-hr. salt spray test. | |
|
| Custom Color | |
|
| Hostile Environment Coating | |
|
| Epoxy Coating | |
| Hopper Discharge | Standard | Optional |
|---|---|---|
| 10-Gallon Pail Pack | |
|
| 10-Gallon Pail Pack with Sealer Gear | |
|
| 25-Gallon Dust Container | |
| Electrical Controls, Gauges, and Enclosures | Standard | Optional |
|---|---|---|
| Minihelic** Gauge | |
|
| Manual or Automated Downtime Cleaning | |
|
| Solenoid Enclosure in NEMA 12 | |
|
| Continuous On-Demand Delta P Control | |
|
| Solenoid Enclosure NEMA 9 | |
|
| Starter Controls | |
| Warranty | Standard | Optional |
|---|---|---|
| 10-Year Warranty | |
DFO 2-4 through 4-128
| Collector Design | Standard | Optional |
|---|---|---|
| Mild Steel Construction | |
|
| ExtraLife Filter Cleaning System | |
|
| Quick-Removal Access Covers | |
|
| Inlets | |
|
| Ledge-Free Hopper | |
|
| Sprinkler Taps | |
|
| Stainless Steel Construction | |
|
| High Temperature Construction | |
|
| Explosion Protected Models | |
|
| Direct Drive Fans | |
|
| Chamber and Exhaust Silencers | |
|
| Abrasion Resistant (AR) Inlet | |
|
| Air Management Modules | |
|
| Extended Dirty Air Plenum | |
|
| Steep-Sided Hopper | |
|
| 2-Mod Hopper | |
|
| Sprinkler Heads | |
|
| Service Platform (OSHA compliant) | |
|
| Damper Pack | |
|
| Drum Sentry Drum-Full Indicator | |
|
| Lined Clean Air Plenum | |
|
| Bag-Out Kit (Filter & Discharge) | |
|
| Bag-In/Bag-Out Kit (Filter & Discharge) | |
| Cartridge Filters | Standard | Optional |
|---|---|---|
| Ultra-Web (MERV* 15) | |
|
| Fibra-Web (MERV 14); Ultra-Tek (MERV 12) | |
|
| Ultra-Web SB (MERV* 15); Ultra-Web AS (MERV* 15); Fibra-Web (MERV 14); Ultra-Tek (MERV 12); Thermo-Web (MERV 14); Torit-Tex (MERV 16) | |
|
| HEPA/ASHRAE Afterfilters | |
| Paint System | Standard | Optional |
|---|---|---|
| Prime Coated Interior | |
|
| Textured Multi-Coat Paint Finish with 2,000-Hour Salt Spray Performance | |
|
| Premium Duty Coating | |
|
| Epoxy Coating | |
| Hopper Discharge | Standard | Optional |
|---|---|---|
| Drum Cover and Hose | |
|
| Slide Gates | |
|
| Rotary Valves and Transitions | |
|
| Screw Conveyors | |
| Electrical Controls, Gauges, and Enclosures | Standard | Optional |
|---|---|---|
| Control Box w/Timer in NEMA 4 Enclosure | |
|
| Minihelic** Gauge Controls | |
|
| Delta P Control, Delta P Plus Control | |
|
| Custom Panels | |
|
| Photohelic** Gauge Standard and Weatherproof | |
|
| Basic Cold Climate Kit | |
|
| Heavy-Duty Cold Climate Kit | |
|
| Solenoid Enclosure (NEMA 7 & 9) | |
|
| iCue™ Connected Filtration Service | |
| Warranty | Standard | Optional |
|---|---|---|
| 10-Year Warranty | |
*The Minimum Efficiency Reporting Value (MERV) of this filter cartridge has been determined through independent laboratory testing using ASHRAE 52.2 (2007) test standards. The MERV rating was determined at a face velocity of 36 meters per minute / 118 feet per minute and loading up to 101.6 mm / 4 in. water gauge. Actual efficiency of any filter cartridge will vary according to the specific application parameters. Dust concentration, airflow, particle characteristics, and pulse cleaning methods all affect filtration efficiency. MERV 15 available in the U.S. only.
** Magnehelic and Photohelic are registered trademarks of Dwyer Instruments, Inc.
