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Oval Replacement Cartridge Filters for Donaldson Torit® Downflo® Oval (DFO) Dust Collectors


Our oval replacement cartridge filters provide superior filtration due to our advanced proprietary BHA® ProTura® Nanofiber filtration technology. This technology is scientifically proven to achieve: higher efficiency, cleaner air, lower pressure drop, longer filter life, and greater energy savings than any other media used in cartridge filters.

BHA ProTura Nanofiber acts as a shield to prevent submicron particles from entering and becoming embedded within the filter's substrate media. As a result, pressure does not build up as rapidly and power requirements are dramatically reduced leading to operational savings.

Independent lab testing has certified our BHA ProTura Nanofiber filters at MERV 15 efficiency, which means they are up to 95% efficient on 0.3 and 1.0 micron size dust. Additional benefits from this superior filtration technology include improved dust cake release and filter life that meets or exceeds competitive oval cartridges more cost effectively.

We offer multiple media configurations to meet all your oval replacement filter needs for the Donaldson Torit® Downflo® Oval (DFO) dust collector in addition to the BHA ProTura Nanofiber, which comes in fire retardant and wide pleat versions. Other filter media options include 100% poly-glass, spunbond polyester and spunbond polyester with PTFE that repels moisture. See the chart below for reference.

Filter Media* Unique Characteristics Typical Applications
BHA ProTura Nanofiber Suitable for most applications. This is the standard filter that is included in all base units.

Maximum Temperature: 180° F

Washable: No
  • Abrasive blasting
  • Carbon black
  • Dry chemical processing
  • Pharmaceuticals
  • Powder paints
BHA ProTura Nanofiber,
Fire Retardant
For applications where live sparks could enter the dust collector. Will not suppress fires if collected materials are combustible.

Maximum Temperature: 180° F

Washable: No
  • Ferrous metal grinding
  • Flame cutting
  • Laser cutting
  • Metal spraying
  • Plasma cutting
  • Welding
BHA ProTura Nanofiber,
Wide Pleat
For applications where large or irregularly shaped particles may enter the dust collector.

Maximum Temperature: 180° F

Washable: No
  • Buffing
  • Composites grinding
  • Fiberglass grinding
  • Grain handling
  • Leather finishing
  • Tobacco processing
  • Wood sanding
BHA ProTura Nanofiber,
Fire Retardant,
Wide Pleat
For applications where larger particles and live sparks may enter the dust collector.

Maximum Temperature: 180° F

Washable: No
  • Coarse grinding of ferrous metals
Poly-Glass For applications with larger particles or with hygroscopic or agglomerative dusts. Filters can be washed and reused.

Maximum Temperature: 180° F
(High temperature version to 275° F is available)

Washable: Yes
  • Coffee
  • Cocoa
  • Detergents
  • Milk powder
  • Salt
  • Sugar
  • Stearates
  • Textiles
100% Spunbond Polyester For applications where high-strength media and excellent release characteristics are necessary.

Maximum Temperature: 180° F
(High temperature version to 275° F is available)

Washable: Yes
  • Cardboard
  • Cement
  • Paper
  • Rubber grinding
100% Spunbond Polyester with BHA Preveil® ePTFE membrane For applications demanding ultra-high filtration efficiencies or difficult dust cake release requirements. Spunbond ePTFE filter cartridges use a BHA Preveil ePFTE membrane to repel moisture while allowing air and moisture vapor to pass through the membrane's extremely small spaces.

Maximum Temperature: 180° F
(High temperature version to 275° F is available)

Washable: Yes
  • Agglomerating materials
  • Asbestos
  • Fluidized bed dryers
  • Food
  • Pesticides
*Other media or custom pleat spacing is available to meet the specific needs of any application. All blends are high-efficiency and proprietary.

**Donaldson Torit® and DownFlo® are registered trademarks of Donaldson Company, Inc.