Aerotech Fans
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Aerotech Fans
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Engineering answers to the most common questions about industrial ventilation, air handling, and pollution control systems.
To prevent moisture carryover into the supply ductwork, the maximum face velocity across a standard AHU chilled water coil should not exceed 500 Feet Per Minute (FPM). If spatial constraints require higher velocities, specialized droplet eliminator plates must be installed downstream.
IE3 designates Premium Efficiency AC induction motors, while IE4 designates Super Premium Efficiency (often achieved using Permanent Magnet or EC technology). Using IE4 motors in continuous-duty AHUs or FCUs can reduce electrical losses by an additional 15% compared to IE3.
A dry scrubber uses an Electrostatic Precipitator (ESP) and activated carbon to magnetically capture smoke and absorb odors. A wet scrubber (Ecology Unit) uses a continuous high-pressure water and surfactant spray to physically wash the grease from the airstream and extinguish live embers.
Yes, dust collectors handling organic particulates like flour, sugar, and cornstarch require strict ATEX and NFPA 68 certification. These systems must be equipped with explosion venting panels and epitropic (anti-static) filter media to prevent catastrophic deflagration.
An enthalpy wheel is a rotating desiccant-coated matrix that transfers both sensible heat (temperature) and latent heat (humidity) between the hot incoming fresh air and the cold exhaust air, recovering up to 80% of the HVAC energy that would otherwise be wasted.
A cleanroom AHU maintains positive pressure by supplying a slightly higher volumetric airflow (CFM) into the sterile core than what is mechanically extracted. High-static centrifugal blowers within the AHU force this excess air outward through airlocks, preventing contaminated ambient air from entering.
Our double-stage high-pressure blowers can generate up to 2500 mm w.g. static pressure by utilizing two impellers mounted in series on a common shaft, effectively doubling the compression capability of a single-stage unit.
For heavy-duty ID fans operating in high-temperature environments, bearings should typically be greased every 2,000 to 4,000 operating hours using high-temperature lithium complex grease, though automated continuous lubrication systems are highly recommended to prevent premature failure.
Severe vibration is typically caused by severe impeller imbalance due to localized particulate buildup, abrasive wear on the blades, or bearing failure. Continuous vibration monitoring systems are recommended to detect these imbalances before they cause catastrophic shaft failure.
Because the Venturi throat accelerates gas to extreme velocities, the throat walls are subject to severe abrasive erosion. Maintenance involves periodic ultrasonic thickness testing of the throat walls and replacing the internal silicon carbide or ceramic wear liners before structural failure occurs.
Marine engine room tube axial fans require a minimum IP56 or IP66 motor rating to survive continuous salt-spray and moisture ingress. The motors must be Totally Enclosed (TEFC or TENV) and the casings should be hot-dip galvanized or marine-grade aluminum.
Water pooling around an AHU is almost always caused by a blocked condensate drain line or an improperly trapped drain pan. Because the blower creates negative pressure inside the cabinet, the drain must feature a P-trap with sufficient depth to overcome the static pressure and allow water to exit.
