Nanofiber FR Dust Collector Filters
Nanofiber FR dust collector filters are cartridge filters built on a nanofiber media layer that has been treated to resist combustion. AirMax Filters supplies these filters for facilities performing welding fume extraction, metalworking, woodworking, and other operations. Every cartridge is made in the USA, held in inventory, and cross-referenced to the OEM part numbers your dust collector was built around.
The filters on this page carry the same dimensions, configurations, and cross-reference coverage as the rest of the cartridge filter line. What changes is the media.
What Makes a Nanofiber FR Filter Different
A nanofiber FR filter differs from a standard cartridge in two ways: the media captures dust on the surface rather than inside the fiber depth, and the substrate carries a fire-retardant treatment. Standard 80/20 blended media can trap particles throughout its thickness, which means some of the load never releases during a pulse-clean cycle. A nanofiber layer holds the fine particulate at the surface, where the pulse can lift it off and drop it into the hopper.
The FR designation refers to the treatment applied to the media substrate. AirMax dust collector filters meet the fire-retardant standards set by the American Society for Testing and Materials. The treatment is what allows the cartridge to be specified into applications where a spark reaching the filter bank is a foreseeable event rather than a remote one.
A conductive nanofiber FR option is also available. Conductive media is specified where static build-up in the dust stream is a concern in addition to combustion, and it is the correct choice when the dust hazard analysis for the facility calls for a grounded filter element.
What Fire-Retardant Treatment Does and Does Not Do
Fire-retardant media slows combustion and reduces the intensity of a fire. It does not make a filter fireproof. Fire-retardant material is not readily susceptible to fire and will either prevent or slow down combustion, but the media can still ignite if a flame is applied directly and held there. At high enough temperatures, every filter material will burn, melt, or vaporize.
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This matters because a fire-retardant cartridge is one layer of protection rather than the whole system. Facilities handling combustible dust typically pair nanofiber fire-retardant dust collector filters with spark traps ahead of the collector and Boss fire suppression on the collector itself. The distinction between fire-retardant and fire-resistant media is covered in more depth in the AirMax guide to fire-retardant versus fire-resistant filters.
Applications for Nanofiber FR Dust Collection Equipment
Nanofiber FR media is specified most often in welding fume extraction, where the particulate is submicron and the process generates sparks continuously. Beyond welding, nanofiber FR dust collection equipment is used across operations that produce fine or combustible dust:
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Welding and cutting fume extraction, including robotic weld cells and fume arms
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Plasma and laser cutting, where the fume load is fine and hot
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Metalworking, grinding, and deburring
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Woodworking, furniture making, and cabinetry, where wood dust and finishing chemicals are both present
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Thermal spray and powder coating operations
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Foundry and abrasive blasting recovery
If a facility has completed a dust hazard analysis under NFPA 652, their documentation will usually name the filter media requirement directly. Have your documents available for your quote and AirMax can match the specifications.
Sizes, Cap Configurations, and Cross-Referencing
AirMax stocks nanofiber FR cartridges in the standard industrial diameters and lengths, including 12.75 inch and 13.8 inch outside diameters in 16-, 26-, 28-, 30-, and 36-inch heights. Open/open and open/closed cap configurations are both available, with or without bolt hole and inner/outer cage. Specialty and custom sizes are made to order.
Nanofiber FR is one of several media options offered across the AirMax cartridge line. The others are standard 80/20 blended, plain nanofiber without the FR treatment, conductive nanofiber FR, spunbond polyester, PTFE membrane on spunbond, and Nomex aramid.
| Media | How It Loads | Specified When |
|---|---|---|
| 80/20 blended (standard) | Depth loading through the media thickness | General dust, no fire hazard, cost is the driver |
| Nanofiber | Surface loading on a nanofiber layer | Fine and submicron particulate, frequent pulse cycles |
| Nanofiber FR | Surface loading, fire-retardant treated substrate | Fine particulate plus a spark or combustible dust hazard |
| Conductive nanofiber FR | Surface loading, fire-retardant and static dissipative | Combustible dust where static build-up is also a concern |
Filters are cross-referenced to OEM part numbers from Donaldson Torit, Camfil Farr, AAF, RoboVent, A.C.T., Dust Hog, Sly, and other manufacturers. If the AMX number is not known, the part number search accepts the compatible OEM number and returns the AirMax equivalent.
Buying Nanofiber Fire-Retardant Dust Collector Filters from AirMax
AirMax Filters is a division of AM Industrial Group, operating from an office in Brook Park, Ohio and a warehouse in Cleveland. Filters are manufactured in the USA and held in inventory rather than built to order, which is what makes same-day shipping possible on stocked sizes. Local pickup is also available at our Cleveland location.
Sizing a replacement cartridge incorrectly is the most common problem on a media change. If the current filter is being upgraded from standard media to nanofiber fire-retardant dust collection equipment, the specialist team will verify the dimensions, pan configuration, and cage requirement against the collector before the order ships.
Frequently Asked Questions
Will a nanofiber FR filter fit my existing dust collector?
Yes, in nearly all cases. Nanofiber FR is a media change, not a dimensional change. The cartridge keeps the same outside diameter, height, and cap configuration as the filter it replaces, so no modification to the collector is required. Confirm the current part number against the cross-reference before ordering.
Does an FR filter satisfy NFPA combustible dust requirements?
Fire-retardant media is one component of a compliant system, not the whole of it. NFPA 652 requires a dust hazard analysis, and the resulting protection strategy usually includes explosion venting, isolation, and suppression alongside the filter media specification. Fire-retardant filters address the media itself and nothing beyond it.
How long does a nanofiber FR cartridge last?
Filter life depends on dust load, moisture, pulse frequency, and run hours, so no single figure applies across facilities. The practical indicator is the differential pressure gauge. A reading above 6 inches of water column generally means the filters are due for replacement, and visible dust discharge from the collector means they are past due.
Is nanofiber FR worth the cost over standard 80/20 media?
It depends on what the collector is pulling. In applications with fine or submicron particulate and a spark risk, the fire-retardant treatment is a safety requirement rather than an upgrade. In clean, coarse dust applications with no ignition source, standard 80/20 blended media is usually the appropriate specification, and the lower cost is real.
Are custom sizes available in nanofiber FR?
Yes. Specialty and custom-sized cartridges are made to order in nanofiber FR media. Provide the dimensions, pan configuration, and cage requirement, or the OEM part number being replaced, and the team will quote it.
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Need help choosing a dust collector filter? Reach out to our experienced team today and we can determine the best solution for your application.