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Downflo® Oval

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® nanofiber 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.

DFO Offers:

  • 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


Outperforms 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% 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 Ultra-Web cartridge filters provide the longest filter life and highest filtration efficiency—which lowers cost.

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% 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.
 

See Cartridge Filters >>
 

Standard Collector

Downflo® Oval Downflo® Oval

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 Mode

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

Standard collector (left) versus Downflo Oval collector (right)
DFO with ExtraLife Cleaning System

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  
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  
Dustronix Control Assembly  
Custom Panels  
Photohelic** Gauge Standard and Weatherproof  
Basic Cold Climate Kit  
Heavy-Duty Cold Climate Kit  
Solenoid Enclosure (NEMA 7 & 9)  

 

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.

Ultra-Web Technology Provides Filters that Deliver

Proven and proprietary Ultra-Web technology delivers longer filter life, cleaner air and greater cost savings.

Downflo Oval (DFO) Dust Collector

This high performance dust collector provides up to 25% more filtration capacity than other same-sized cartridge collectors.

Downflo Oval DFO Filter Changeout

The Downflo Oval - DFO - provides easy filter changeouts with its quick-release handle design.