Manufactured to the Highest Quality Standards Standard Capacity 57/8" deep – 150 FPM @ 1.0 in. w.g. 111/2" deep – 260 FPM @ 1.0 in. w.g. HEPA Efficiencies - 99.97% and 99.99% minimum efficiency on 0.3 micrometer particles. ULPA Efficiency - 99.999% minimum efficiency of 0.3 micrometer particles and 99.9995% on 0.1 to 0.2 micrometer particles (111/2" deep only). For ULPA and MEGA efficiencies up to 99.999995% on 0.10 to 0.20 micrometer particles, use AstroCel II LPD Series minipleat filters. High Capacity 24" x 24" x 111/2" deep - 2000 CFM @ 1.4 in. w.g. HEPA Efficiencies - 99.97% and 99.99% minimum efficiency on 0.3 micrometer particles. Selected nuclear grade AstroCel I filters have been qualified by the Department of the Army in accordance with ASME AG-1. They are used in critical applications such as the Department of Energy and nuclear power plants. The qualification tests subject the filters to a series of rigorous environmental conditions and must meet rated efficiency. Underwriters’ Laboratories Classifications AstroCel l filters are UL Classified. Testing was performed according to UL Standard 900 (except those made with non-fire retardant wood cell sides). UL 586 This standard ensures that each filter is individually tested at the factory. Additionally, representative filters are tested by UL to ensure that they provide HEPA level filtration, after being subjected to the following conditions: • High moisture (90% R.H.) • High temperature (700°F/371°C) • Low temperature (27°F/-3°C) UL also subjects the filter to a spot flame test (1750°F/954°C). A numbered UL label certifying that the filter meets Standard 586 can be applied to the filter. Media Testing to Meet Exacting Quality Standards Every roll of media is carefully checked for a specific set of physical and performance characteristics, including: • Efficiency • Resistance • Thickness • Weight • Tensile Strength • Binder Content • Water Repellency 3 Overall Efficiency Testing Two methods of overall efficiency testing used: PAO Test This has been the industry standard for many years. It is conducted using a forward light scattering photometer. The filter is challenged with poly-alpha-olefin (PAO). By measuring the upstream and downstream concentration, the filter efficiency can be calculated. Laser Test The filter is tested with a laser spectrometer using polystyrene latex (PSL) spheres. Filter efficiency is determined by comparing the upstream and downstream concentrations. Efficiencies down to 0.10 micrometers can be determined. Scan Testing Leak Testing Filters that pass the overall efficiency test may still have minute pinhole leaks. AstroCel I filters can be factory scanned to assure there are no pinhole leaks. Scanning detects these leaks which are repaired before the filter is released for shipment. AAF uses a proprietary static scan test with a challenge aerosol of non-toxic, polyfunctional alcohol that leaves no residue on the media. For pharmaceutical and those applications requiring PAO, AAF offers scanning with this material using a light scattering photometer. Scan test showing leak indicated by a smoke trail. Scanning with light scattering photometer. AAF laser spectrometer.
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