The AstroCel II LPD Series with knife edge cell sides was designed specifically for AAF's AstroGel gel seal grid system. The grid consists of a network of E-channel extrusions in which a gel sealant is poured to assure an airtight seal around the edges.

With a 2", 3", and 4" deep media packs, the AstroCel II’s mini-pleat design reduces resistance and provides the lowest possible pressure drop. Ribbons of media maintain pleat separation within the pack, while allowing a more compact filter depth than corrugated separators. The media pack is bonded to the sides of the extruded aluminum frame with urethane adhesive, forming an airtight seal. AstroCel II microglass media is water-resistant and fire-retardant.

AstroCel II filters are scan tested at 99.99% efficiency with a NON-DOP aerosol to insure the filter is free from pin hole leaks. Also available is an ULPA (Ultra Low Penetration Air) model, which is additionally laser tested to 99.9995% at 0.12μm.