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General
Alpha Panel Minipleat HEPA/ULPA filters are avail-
able in two particle size efficiencies: 99.99% on 0.3
µm and 99.99% on 0.12 µm. They are offered in a
complete range of standard sizes to meet the needs
of critical applications where HEPA/ULPA filtration
is required. Individual testing under rigid quality
control and modern assembly methods ensures
conformance to specifications.
Construction
Filter media is manufactured of moisture resistant
microfine fiberglass that is formed into closely-
spaced pleats held firmly in place with polyurethane
sealant bead separators. The 2.1” (53 mm) sepa-
ratorless minipleat panel is urethane sealed into a
clearcoat- anodized extruded aluminum frame.
Media dividers are furnished on all filters over 36”
width. Filters over 24” height are also furnished
with media dividers and pleats that are parallel to
the width.
Alpha Panel HEPA/ULPA filters can be furnished
with 0.25” thick x 0.75” wide closed cell neoprene
gaskets as an option on either side or both sides of
the face flanges.
Testing
Each Alpha Panel HEPA/ULPA filter is scan tested
after assembly with automated laser equipment to
ensure that it has attained a particle size efficiency
of at least 99.99% on 0.30 µm or 99.99% on 0.12
µm. This performance meets the requirements of
the Institute of Environmental Sciences and
Technology (IEST) RP-1 for Type C or F filters.
Efficiency and pressure drop are certified on each
filter identification label.
Installation
Alpha Panel HEPA/ULPA filters are used in applica-
tions and equipment that require ultraclean air.
These may range from the fabrication of microelec-
tronics, semi-conductors and medical devices to
aerospace, biotech and pharmaceutical manufac-
turing.
The standard face velocity range of 70 to 110 fpm
makes them ideal for unidirectional (laminar flow)
applications in clean benches, ceiling grids, fan
powered filter units, and horizontal flow wall mod-
ules.
Filters of standard construction may be operated at
up to 150 fpm face velocity and to a final static pres-
sure drop of 2.0 inch w. g. As with all HEPA and
ULPA filters, high efficiency ASHRAE-rated pre-
filters are recommended.
Physical Data
Media: Moisture-resistant microfine fiberglass
Filter pack: 2.1” (53 mm) separatorless minipleat
Media sealant: Urethane
Pleat stabilizers: Polyurethane bead separator
Frames: Clearcoat-anodized extruded aluminum
Media dividers: Extruded aluminum channel
Gaskets: Closed cell neoprene
Alpha Panel
Minipleat HEPA/ULPA Filters
Models AP*-xxxx
(Where * indicates efficiecy designator of 493 for 99.99% efficient on 0.30
micron particles or 591 for 99.995% efficient on 0.12 micron particles.)
Important Features
• Minipleat separatorless filter pack
• Thin and lightweight easy-to-handle units
• Rugged 3” deep clearcoat-anodized extrud-
ed aluminum frame
• Available in many standard sizes
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