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Donaldson’s high efficiency filtration removes particulate contamination from critical environments. Donaldson engineers have worked closely with the aerospace and defense industries to design filters that operate at the highest efficiencies, are easy to maintain, and provide superior protection for passengers, crew, and equipment. The breadth of our experience in all types of air filtration and close partnership with major airframe manufacturers and airlines enabled us to develop a product line that includes cabin air filters, chemical filters, and specialty filters for the protection of avionics and other equipment. Behind all our filters stand 80 years of Donaldson filtration experience, as well as our corporate commitment to technologically advanced products and responsive customer service worldwide.
Donaldson brings cleanroom filtration technology to aircraft cabin recirculation systems.
Donaldson Company is the leading manufacturer of HEPA (High Efficiency Particulate Air) filters. HEPA filters have a removal efficiency of 99.97 percent of all 0.3µm particles. The 0.3µm benchmark is used in efficiency ratings, because it approximates the most difficult particle size for a filter to capture. The filters are even more efficient in removing both smaller particles (tobacco smoke, atmospheric dust, microbiological material) and larger ones (lint, pollen).
HEPA filters can be especially effective in removing bacteria and microbial aerosols from aircraft cabin air.
Because these microbiological organisms are likely to stick to larger particles — in the 1µm to 10µm range — the filter efficiency for particles carrying bacteria or virus is much higher than the minimum efficiency.
Donaldson HEPA filters achieve high efficiency through advanced filter design, careful airflow management and enhanced packing of the filter media.
Donaldson’s computer-controlled manufacturing line pleats a continuous sheet of glass fiber media while spacing each pleat with non-flammable hot melt beads. Each filter is one continuous sheet of media, eliminating any leakage through seals and increasing the structural strength.The configuration of beads allows substantially more media surface area to be packed into each filter. The beads are placed only between the pleats, so not to cover filter media on the pleat tips and to reduce the filter’s weight. Donaldson filters are carefully tested to assure filter efficiency, integrity, and performance. Donaldson designs and manufactures aircraft cabin recirculation filters to perform exactly as specified — reducing maintenance costs and improving cabin air quality.
More details are available in our Product Literature and Application Overview sections.
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