Donaldson Torit Downflo Oval DFO 3-12 Cartridge Dust Collector

Manufacturer: Donaldson Torit

Model: DFO 3-12 (3 Wide x 4 High Matrix)

Serial Number: 12235636-L1-1

Filter Capacity: 12 Oval Cartridge Filters

Airflow Rating: ~3,000 to 6,500 CFM (Depending on fan/motor HP and static pressure)

Cleaning Mechanism: Reverse Pulse-Jet Compressed Air Cleaning

Discharge Setup: Hopper Bottom with Rotary Airlock Valve & Drum Discharge Kit

Overview

Up for sale is an industrial Donaldson Torit Downflo Oval DFO 3-12 Cartridge Dust Collector (Serial Number: 12235636-L1-1). Recognized as the industrial gold standard for dust and fume collection, the DFO series utilizes proprietary oval-shaped cartridge filters combined with downward airflow technology to deliver high filtration efficiency and lower pressure drops.

As seen in the provided image, this unit is configured with an integrated side-mount blower fan package, a steep hopper discharge with a rotary airlock valve, a 55-gallon drum collection kit, and outdoor support legs with cross-bracing. The 12-filter capacity makes it ideal for central dust collection across medium-to-large metalworking, plasma cutting, woodworking, or shot blasting cells.

Key Specifications

• Filter Count: 12 Cartridge Filters (Oval Profile)
• Filtration Media Area: ~2,280 to 3,040 Sq. Ft. (Depending on Ultra-Web / Fibra-Web filter media installed)
• Matrix Configuration: 3 Columns Wide x 4 Filters High
• Cleaning System: Automatic Continuous Reverse Pulse-Jet (Compressed Air)
• Airflow Capacity Range: ~3,000 CFM – 6,500 CFM
• Discharge Type: Hopper Discharge with Motorized Rotary Airlock & Drum Seal Kit
• Blower Package: Direct-Drive Side/Top-Mounted Industrial Blower Fan (Typically 10 HP to 20 HP)
• Structure: Heavy-Duty Welded & Bolt-On Steel Frame with Support Legs & Bracing

Features & Machine Highlights

• Downflo Oval Technology: Donaldson’s patented oval filter shape provides 25% more airflow efficiency and superior pulse-cleaning dust release compared to standard round cartridges.
• Turnkey Discharge Setup: Features a motorized rotary airlock valve below the hopper. This allows continuous dust discharge into the drum without shutting off the collector or losing vacuum seal.
• Side-Mounted Blower Package: Integrated fan enclosure saves shop floor space and simplifies ductwork connections.
• Automatic Pulse Cleaning: Differential pressure controller automatically pulses compressed air through the cartridges while the unit is running to maintain low operating resistance.