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Product Overview

  • Meets requirements for performance, testing and construction specified in accordance with Section 4.2.5 of IEST-RP-CC001.3 for Type A or Type C HEPA filters
  • Also given a scan or probe test in accordance with Section 6.2 of IEST-RP-CC034.1 for Type C HEPA filters
  • Can be either conventional separator style or PureForm® separatorless style 
  • PureForm filters have high dust holding capacity (DHC) and long service life

Typical Applications

  • Food and Beverage
  • Healthcare
  • Industrial
  • Pharmaceutical
Filter Depth
  • 6"
  • 12"
Media Type
  • Boron silicate microfiber
Frame Material
  • Wood
  • Aluminum
  • Galvanneal Steel
  • Stainless Steel
Separator Style
  • Aluminum
  • Separatorless
Max Operating Temperature
  • 250°F (121°C)
Industrial Grade HEPA Filters meet the requirements for performance, testing and construction specified in accordance with Section 4.2.5 of IEST-RP-CC001.3 for Type A and Type C HEPA filters. These filters are also tested in accordance with MIL-STD-252 while encapsulated at two flows for resistance and penetration at nominal rated capacity, and for penetration at 20% of the nominal rated capacity on a Q-107 Penetrometer. The penetration at both test flows cannot exceed .03%, and the filters are labeled and certified to have an efficiency of no less than 99.97% on a challenge aerosol having a homogenous particle size of 0.3 μm.

In addition to the efficiency test, each Type C HEPA filter is given a scan or probe test for pinhole and edge leaks greater than .01% of the upstream concentration at 90 fpm (±10 fpm) face velocity. Scan testing is in accordance with Section 6.2 of IEST-RP-CC034.1. Test results appear on the filter label, carton label, and the Test and Certification of Compliance Report.

AAF Flanders manufactures both conventional separator style and PureForm separatorless HEPA filters. To make a separator style filter, the media is folded over corrugated aluminum separators with hemmed edges to separate the pleats in the filter pack. 

The PureForm filter offers many advantages over conventional separator style HEPA filters:
  • More usable media area for longer service life because of higher DHC
  • Reduced cost of ownership because of longer service life
  • Maximum utilization of the media
  • Media pack can be incinerated
  • Media is 28 mils thick
Industrial Grade HEPA Filters are available in a variety of wood and metal frame materials, such as aluminum, galvaneal, plywood, and stainless steel. The standard gasket is 0.75 in. x 0.25 in. neoprene for installation on either the upstream, downstream, or both sides of the filter. The standard gel seal is AAF Flanders’ BluJel® Seal, which is a two-part silicone material suitable for temperatures up to 392°F. Biological Grade HEPA Filters are also UL 586 listed.

For sizes and performance data:

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