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Downflo Oval Dust Collectors

The Donaldson Torit Downflo® Oval cartridge dust and fume collector now 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. There are 26 Downflo Oval cartridge dust collectors models including 3 self-contained, “plug and play” units: DFO 1-1, DFO 2-2, and DFO 3-3.
HomeProductsCartridge Dust CollectorsDownflo Oval Dust Collectors
Downflo Oval Dust Collectors

Downflo Oval Dust Collectors

A family of over-achievers

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® fine fiber filtration technology, DFO delivers cleaner air, up to two times longer filter life, and greater cost savings.

The DFO advantage is found in the collector’s proprietary design and components. The combination of a new cabinet design that greatly lowers cabinet velocities, proprietary ExtraLife™ cleaning technology, and proven Ultra-Web fine fiber filters allows more airflow through the collector without increasing the size of the footprint or damaging the filters.

 
A smaller collector helps lower the initial purchase price, reduces filter replacement costs and opens up valuable manufacturing floor space.​
DFO Offers:
  • Lower initial cost per 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
  • 10-year warranty

 

Featured Technical Article
A Case for Downflow Cartridge Collection
In this article, Donaldson Torit expert John Woolover discusses the design advantages of the Downflo dust collectors.
Read Free Technical Article
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Outperforms all other collectors

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 percent more capacity than same-sized dust collectors.
Cost Effective
The proprietary ExtraLife Filter Cleaning System averages up to 30 percent increase in pulse cleaning energy for unmatched cleaning ability.
Innovative
Unique oval-shaped Ultra-Web cartridge filters provide the longest filter life and highest filtration efficiency—which lowers cost.
 
 
 

Proprietary Technology That Performs

The remarkable story of DFO begins with the oval cartridge and Ultra-Web Media Technology. Proven and proprietary Ultra-Web technology delivers longer filter life, cleaner air and greater cost savings than other types of cartridge filter media. Made with an electrospinning process that produces a very fine, continuous fiber of 0.2-0.3 micron in diameter, Ultra-Web na. Proven and proprietary Ultra-Web technology delivers longer filter life, cleaner air and greater cost savings than other types of cartridge filter media. Made with an electrospinning process that produces a very fine, continuous fiber of 0.2-0.3 micron in diameter, Ultra-Web fine fiber filter media. Made with an electrospinning process that produces a very fine, continuous fiber of 0.2-0.3 micron in diameter, Ultra-Web fine fibers form a permanent web-like net with very fine interfiber spaces that trap dust on the surface of the media.
 
 
​DFO FIlter Media Pleats
​ The innovation of shorter and stiffer filter pleats helps minimize dust entrapment and simplify filter cleaning. By reducing the height of the filter pleats from the standard 2 inches to 1.5 inches, the pleat wall is less likely to collapse or bend, which can encapsulate dust and prevent its expulsion.
Downflo Oval Filter Standard Filter
 

unique oval shape contributes to higher airflow capacity

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 percent 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.
 
Downflo Oval Collector: 9145 CFM
 
Standard Collector: 7315 CFM
 

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.
 
​DFO 3-3 Air Velocity Distribution DFO 3-3 Stress and Deflections 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.
 
 

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).

 

DFO 1-1, 2-2, 3-3

Collector Design ​Standard ​Optional
Mild Steel Construction x
Integral High Performance Power Packs x
Ledge-Free Hopper x
Inlet x
Sprinkler Taps x
ExtraLife Filter Cleaning System x
Quick-Removal Access Covers x
Integral Exhaust Silencer x
Airflow Damper x
Stainless Steel Construction x
Explosion Protected Models x
High Static Power Packs x
Inlet Damper x
Abrasion Resistant (AR) Inlet x
Sprinkler Heads x
Extraction Arms (7, 10, 14) x
Caster Packs x
Bag-Out Kit (Filter & Discharge) x
Bag-In/Bag-0ut Kit (Filter & Discharge) x
Cartridge Filters ​Standard ​Optional
Ultra-Web (MERV* 15) x
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) x
HEPA/ASHRAE Afterfilters x
​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. x
Custom Color x
Hostile Environment Coating x
Epoxy Coating x
Hopper Discharge ​Standard ​Optional
10-Gallon Pail Pack x
10-Gallon Pail Pack with Sealer Gear x
25-Gallon Dust Container x
Electrical Controls, Gauges, and Enclosures ​Standard ​Optional
Minihelic** Gauge x
Manual or Automated Downtime Cleaning x
Solenoid Enclosure in NEMA 12 x
Continuous On-Demand Delta P Control x
Solenoid Enclosure NEMA 9 x
Starter Controls x
​Warranty ​Standard ​Optional
10-Year Warranty x
 

DFO 2-4 through 4-128

​Collector Design ​Standard ​Optional
Mild Steel Construction x
ExtraLife Filter Cleaning System x
Quick-Removal Access Covers x
Inlets x
Ledge-Free Hopper x
Sprinkler Taps x
Stainless Steel Construction x
High Temperature Construction x
Explosion Protected Models x
Direct Drive Fans x
Chamber and Exhaust Silencers x
Abrasion Resistant (AR) Inlet x
Air Management Modules x
Extended Dirty Air Plenum x
Steep-Sided Hopper x
2-Mod Hopper x
Sprinkler Heads x
Service Platform (OSHA compliant) x
Damper Pack x
Drum Sentry Drum-Full Indicator x
Lined Clean Air Plenum x
Bag-Out Kit (Filter & Discharge) x
Bag-In/Bag-0ut Kit (Filter & Discharge) x
Cartridge Filters ​Standard ​Optional
Ultra-Web (MERV* 15) x
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) x
HEPA/ASHRAE Afterfilters x
Paint System ​Standard ​Optional
Prime Coated Interior x
Textured Multi-Coat Paint Finish with 2,000-Hour Salt Spray Performance x
Custom Color x
Premium Duty Coating x
Epoxy Coating x
Hopper Discharge ​Standard ​Optional
Drum Cover and Hose x
Slide Gates x
Rotary Valves and Transitions x
Screw Conveyors x
Electrical Controls, Gauges, and Enclosures ​Standard ​Optional
Control Box w/Timer in NEMA 4 Enclosure x
Magnehelic** Gauge Controls x
Delta P Control, Delta P Plus Control x
Dustronix Control Assembly x
Custom Panels x
Photohelic** Gauge Standard and Weatherproof x
Basic Cold Climate Kit x
Heavy-Duty Cold Climate Kit x
Solenoid Enclosure (NEMA 7 & 9) x
Warranty ​Standard ​Optional
10-Year Warranty x
*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 118 feet per minute and loading up to four inches 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.
** Magnehelic and Photohelic are registered trademarks of Dwyer Instruments, Inc.
Ultra-Web Technology Provides Filters that DeliverProven and proprietary Ultra-Web® technology delivers longer filter life, cleaner air and greater cost savings.
Downflo Oval (DFO) Dust CollectorThis high performance dust collector provides up to 25 percent more filtration capacity than other same-sized cartridge collectors.
Downflo Oval DFO Filter ChangeoutThe Downflo Oval - DFO - provides easy filter changeouts with its quick-release handle design.