Downflo Oval DFO Cartridge Dust Collector | Donaldson Industrial Dust, Fume & Mist

Overview

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.

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.

Cartridge Filters

Choose cleaner air with Donaldson Torit® advanced-technology cartridge dust collectors filter media that conquer the challenges of most types of industrial dusts.

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.

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.

Standard collector (left) versus Downflo Oval collector (right)

Pulse Cleaning Technology

DFO with ExtraLife Cleaning System

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).

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)

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.