Aerotech Fans
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AeroTech's High Volume Limit Load Blower in DIDW (Double Inlet Double Width) configuration features air entry from both sides of the blower, providing higher airflow in a compact size. The backward curved impellers are fabricated from high-grade steel, dynamically balanced for smooth vibration-free operation. The rigid welded construction from heavy-gauge steel with scroll-type casing ensures efficient air guidance.
The non-overloading characteristic of backward curved impellers inherently limits absorbed power, preventing motor overloading — a critical safety feature for large industrial systems. Available in direct drive or belt-driven configuration. Anti-corrosive powder coating or epoxy paint for enhanced durability.
Heavy-duty ball bearings and precision-machined shaft for continuous duty. Delivers up to 2,50,000 CMH at above 1200 mm w. g.
static pressure, handling temperatures up to 380°C with cooling disc. Available in MS, SS, Aluminium, and FRP. Widely used in HVAC air handling units, central AC plants, clean rooms and laboratories, industrial ventilation in factories and workshops, commercial spaces including malls, theatres, hotels, hospitals, and office complexes, and power plants and refineries for combustion air supply.
Max Airflow
Up to 2,50,000 CMH
Max Pressure
Above 1200 mm w.g.
Temp Range
Up to 380 C with cooling disc
Material
MS / SS / Aluminium / FRP
High Air Volume Handling
Suitable for large capacity airflow at low & medium static pressure
Low Noise Operation
Forward curved blades ensure quieter performance compared to backward curved designs
Compact & Space-Saving
DIDW arrangement offers double air intake in a single compact unit
Non-Overloading
Backward curved impellers inherently limit absorbed power, preventing motor overloading
HVAC & AHU
Clean Environments
Commercial
Double Inlet, Double Width (DIDW) design — air enters from both sides for higher airflow in compact size.
Backward curved impellers fabricated from high-grade steel, dynamically balanced.
Rigid welded construction from heavy-gauge steel with scroll-type casing.
Available in direct drive or belt-driven configuration.
Anti-corrosive powder coating or epoxy paint for enhanced durability.
Heavy-duty ball bearings and precision-machined shaft for continuous duty.
| Model | Air Volume (CFM) | Static Pressure (in.wg) | RPM (Max) | Motor (HP) |
|---|---|---|---|---|
| DIDW-900 | 90,000 | 700 | 1,600 | 110 |
| DIDW-1120 | 150,000 | 1000 | 1,450 | 220 |
| DIDW-1250 | 200,000 | 1500 | 1,200 | 355 |
A Double Inlet Double Width (DIDW) blower should be chosen when you require massive volumetric airflow (CFM) in a clean-air environment with restricted installation space, such as an HVAC Air Handling Unit. For high-pressure or material handling, an SISW blower is required.
For highly abrasive airstreams containing cement clinker or boiler fly ash, impellers must be fabricated from abrasion-resistant alloys like Hardox 400/500 steel, or heavily coated with tungsten carbide, to prevent rapid blade erosion and fatal fan imbalance.
For extracting highly corrosive acids like hydrochloric or sulfuric acid, Fiberglass Reinforced Plastic (FRP) offers superior chemical resistance and lifecycle longevity compared to 316L Stainless Steel, which can still succumb to chloride pitting under extreme concentrations.
A V-Belt drive decouples the fan speed from the motor's synchronous RPM, allowing engineers to precisely tune the fan's performance curve by changing pulley ratios. It also thermally and mechanically isolates the motor from hot or vibrating fan casings.
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.
