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General
Precision Pak extended surface bag filters are
designed for use in most commercial or industrial
HVAC systems where medium to high efficiency fil-
tration is required. Precision Pak filters are available
in two media types: lofted fiberglass and micro-fine
synthetic media with average efficiency ranges of
55%, 65%, 85%, and 95% per ASHRAE Standard
52.1 test methods. Operating face velocities up to
625 fpm are available for all models. Precision Pak
filters in depths up to 22” are suited for variable air
volume systems. Filters with greater depth are not
recommended.
Precision Pak filters are UL 900 Class 2 listed as a
standard and are also available in UL Class l.
Installation Considerations
Precision Pak bag filters may be installed in
Flanders Type 9 Holding Frames, K-Trac Filter
Framing Modules, Sureseal Side Access Housings,
or in similar existing hardware.
Type 9 Holding Frames are riveted together to form
a bank and may be installed for upstream or down-
stream service. K-Trac Filter Framing Modules are
especially suitable for medium to large built-up filter
banks. Smaller systems and systems with minimum
upstream access space are best served using
Sureseal Side Access Housings.
Physical Data
Media: Lofted fiberglass or micro-fine synthetic
Media Backer: Non-woven polyester
Pocket Sealant: Thermoplastic resin
Pocket Retainer: 26 ga. corrosion-resistant steel
Header: 11/26” wide 26 ga. corrosion-resistant steel
Operating Limits: 100% RH and 190° F
Actual Header Face Size: Nominal size less 5/8” (e.g., a
nominal 24” x 24” filter header is actually 23-3/8” x 23-
3/8”)
Precision Pak
Extended Surface Bag Filters
Synthetic Class 1: PAPxx**Sxxxxx1 Synthetic Class 2: PAPxx**Sxxxx
Glass Class 1: PAPxx**Gxxxxx1 Glass Class 2: PAPxx**Gxxxx
(** insert 50, 65, 85 or 95 for ASHRAE efficiency)
Important Features
• Low initial pressure drop provides longer life.
• Adjustable-width stitched pockets provide
aerodynamics for optimal inflation.
•Wide range of cartridge depths, efficiencies
and operating capacities are available.
• Edges have an overlock stitch.
•Available in lofted fiberglass or synthetic media.
• 100% stake-through pocket retainers
• UL 900 Class 1 or 2 available
Flanders - Foremost in Air Filtration
Corporate Headquarters, St. Petersburg, FL
the filter and hvac store