Model HFA Washable Electrostatic Commercial Air Filter
High Efficiency Particulate Removal
Designed with high efficiency particulate removal and dust control in mind, Model HFA is perfect for use in hospitals, laboratories, electronic and computer assembly areas. Model HFA air filter contains a balanced combination of electrostatic and impingement media.
Model HFA utilizes multiple layers of woven industrial polypropylene fabric with nonwoven polyester panels for optimal filtration effectiveness. The nonwoven polyester captures the smaller particles, and particles that do not normally respond to an electrostatic charge. The Model HFA electrostatic panel style air filter can be water rinsed for dirt removal.
Model HFA utilizes Permatron's exclusive Accumulator Chamber® design, consisting of two electrostatically charged fabric panels separated by our unique ACCUMULATOR CHAMBER® produces a very effective three-stage filtration process. The first media panel (prefilter) attracts and holds airborne particulates. The filter fabric's inherent electrostatic charge enhances filtration by drawing particulates onto fiber surfaces like iron fillings onto a magnet. Static electricity, being static, does not flow like electrical current, and therefore does not discharge over time or require either grounding or insulation. When particulates build up on the prefilter, airflow causes them to break off and be swept into the ACCUMULATOR CHAMBER, where turbulence and electrostatic forces cause agglomeration into even larger particulates. These agglomerated particulates are too large to pass through the second panel (afterfilter). The afterfilter attracts and holds the smaller particulates that may have escaped the prefilter, or do not respond to an electrostatic charge. Using a unitized filter bank design, our electrostatic filters promote free air flow with superior dust holding capacity while resisting face loading. The filter's steel outer frame features strategically placed drain holes for thorough cleaning.
No system modifications or electrical hook-ups are needed. Model HFA is available in any size you require up to 1,000 square inches. Over 1,000 square inches is available, but requires special handling, and is not recommended. We recommend the filter be manufactured in 2 pieces and the frames butted together. Available in a 1/4" or 1/2" (without Accumulator Chamber design), 1" or 2" galvanized steel frame. Stainless steel is also an option for cleanroom environments.
Product model name
Model | HFA |
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Material frame is made of
Frame | Galvanized Steel |
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Filtering material used
Media | Polypropylene & Non-Woven Polyester |
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Thickness filter is available in
Filter Thickness | 1/4", 1/2", 1", 2" |
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Percentage of dust captured by filter under test conditions
Average Arrestance Efficiency | 89% |
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Clean filter resistance to air flow
Initial Resistance | 0.20" w.g. |
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Dust captured before reaching end of test pressure
Dust Holding Capacity | 120 grams |
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Underwriters Laboratory flammability designation
U.L. Classification | As to Flammability Only |
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Length of time product is warrantied
Warranty | 5 Years |