Aerotech Fans
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Engineering answers to the most common questions about industrial ventilation, air handling, and pollution control systems.
When equipped with a PTFE-coated HEPA H14 final filter, a welding fume extractor captures 99.995% of sub-micron metallic oxides, keeping Hexavalent Chromium (Cr(VI)) and Manganese exposures well below OSHA's strict Permissible Exposure Limits (PEL).
The cooling capacity of an industrial air washer is mathematically limited by the ambient wet-bulb depression (the difference between the dry-bulb and wet-bulb temperatures). The system can cool the air close to the wet-bulb temperature, but it can never physically drop below it.
Chemical packed bed scrubbers utilize random packing media, most commonly Pall rings, Raschig rings, or Intalox saddles. Fabricated from Polypropylene (PP) or PVDF, these shapes maximize the wetted surface area for gas absorption while minimizing aerodynamic pressure drop.
To neutralize Sulfur Dioxide (SO2) in a wet scrubber, the recirculating water is typically dosed with an alkaline reagent such as Sodium Hydroxide (Caustic Soda, NaOH) or Calcium Carbonate (Limestone), which reacts with the SO2 to form harmless aqueous salts.
Yes, high-energy venturi wet scrubbers are capable of capturing sub-micron particulate matter down to 0.3 microns with up to 99% efficiency by relying on extreme throat velocities to atomize the scrubbing liquid, creating violent collisions with the dust.
Unlike standard ducted ventilation fans which are measured in volumetric flow (CFM or CMH), the performance of an impulse jet fan is measured strictly by its aerodynamic thrust output, rated in Newtons (N), which dictates its ability to entrain and push surrounding ambient air.
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.
PTFE (Teflon) membrane filter bags are required when handling highly abrasive dust, sticky/agglomerative particulates, or extreme temperatures up to 260°C. The slick membrane forces surface filtration, preventing dust from penetrating the core fabric and ensuring flawless pulse-jet cleaning.
Non-woven felted bags (like standard 16 oz polyester) are thick and provide high-efficiency depth filtration, making them standard for pulse-jet systems. Woven bags are thinner, rely strictly on the dust cake for filtration, and are used primarily in older mechanical shaker dust collectors.
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.
The lifespan of activated carbon in a kitchen exhaust scrubber ranges from 3 to 12 months, highly dependent on the cooking volume and the efficiency of the upstream Electrostatic Precipitator (ESP). If the ESP fails, grease will instantly blind the carbon's micropores.
A G4 filter is a pleated, primary coarse filter used at the intake of an AHU. It captures large particulate matter (like dust, pollen, and insects) with 90% arrestance, acting as a sacrificial shield to protect the expensive secondary F7 fine filters and the chilled water coils.
