AstroCel II: LPD Series knife-edge cell sides

Product catalog summary

Introduction
The AstroCel® II LPD Series by AAF International offers advanced HEPA and ULPA filters designed for cleanroom environments in industries such as semiconductor, pharmaceutical, biotech, and food processing. These filters are engineered to control airborne contaminants efficiently while minimizing operating costs.

Mini-Pleat Media Pack
The filters feature a mini-pleat media pack that provides high efficiency with the lowest possible pressure drop. Available in depths from 2" to 4", the design includes 7.5 to 8 pleats per inch, maximizing media usage in a compact form. The pleats are maintained straight to ± 1/4", eliminating the need for foreign separators and ensuring optimal airflow and cleaning potential.

Space-Saving Design
The compact design of the media pack, achieved through mini-pleat technology, reduces resistance and pressure drop, thus lowering operating costs. The filters are lightweight, easy to install, and available in various cleaning efficiencies.

Construction and Sealing Options
Constructed from borosilicate microfibers, the filters are water-resistant and fire-retardant. They are attached to an anodized extruded aluminum frame using a UL-classified adhesive. Sealing options include gasket seal, gel seal, and knife edge seal, suitable for different grid systems.

Quality Control and Testing
AAF implements rigorous quality control, starting with media testing for efficiency, thickness, and other parameters. Each filter is tested and certified for efficiency and pinhole leaks, if required. AAF's testing facilities ensure compliance with the highest standards, using methods like laser particle counters and static scan tests.

Operating Data and Efficiency
The filters are designed to handle large air volumes typical in cleanrooms, with a focus on minimizing pressure drop to reduce energy consumption. HEPA filters offer 99.99% efficiency on 0.30 micrometer particles, while ULPA filters provide 99.9995% efficiency on 0.10 to 0.20 micrometer particles. AAF's volumetric testing method ensures accurate pressure drop measurements, crucial for cost-effective cleanroom operations.

Conclusion
AAF International's AstroCel II LPD Series filters are a reliable choice for cleanroom applications, offering high efficiency, low pressure drop, and robust construction. Continuous product research and improvement ensure these filters meet evolving industry standards.

Catalog excerpts

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LPD Series HEPA and ULPA Filters

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HEPA and ULPA Filters for State-of-the-Art Cleanroom Requirements • Lightweight and compact • Easy installation — no corrugated separators • Mini-pleat design features maximum media cleaning potential • Lowest possible pressure drop reduces operating costs • Available in a range of cleaning efficiencies The AAF AstroCel II LPD Series is a unique family of mini-pleat HEPA and ULPA filters designed to meet the demanding airflow and efficiency requirements of the semiconductor, pharmaceutical, biotech, food processing, and other industries in which airborne contaminants must be carefully controlled....

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Sturdy Construction Manufactured from borosilicate microfibers, AstroCel II filter glass media is water-resistant and fire-retardant. Neoprene Gasket Seal Frame The media pack is permanently attached to an anodized extruded aluminum frame with a UL classified, white urethane adhesive. The AstroCel II LPD Series filters with knife edge cell sides was designed specifically for gel seal grid systems. 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. Frames are available with gasket seal, gel seal, or knife edge seal...

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Operating Data HEPA FILTER MEDIA 99.99% Minimum Efficiency On 0.30 Micrometer Particles ULPA FILTER MEDIA 99.9995% Minimum Efficiency On 0.10 to 0.20 Micrometer Particles Lowest Possible Pressure Drop Because of the relatively large volumes of air handled in a typical cleanroom application, operating cost is a prime consideration in the design of the air filtration system. One of the most important areas to be evaluated is the resistance or pressure drop across the HEPA filters, because fan horsepower is the single biggest energy consumer in the cleanroom. Some manufacturers determine the test...

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