High Static Efficiency
Curved blade geometry converts rotational velocity into static pressure efficiently, overcoming duct, filter, and plenum resistance.
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Delco Fans manufactures premium-grade Backward Curved Centrifugal Fans equipped with high-performance external rotor motors. Engineered specifically for OEMs requiring high aerodynamic efficiency, stable static pressure, and quiet acoustic profiles, these motorized impellers operate seamlessly under high-resistance industrial environments.
Featuring precision backward-curved blades, our impellers prevent motor overload across varying pressure differentials. Every assembly undergoes rigorous dynamic balancing to ISO standards to guarantee vibration-free service and maximum lifecycle reliability.
Built on over five decades of motor and air movement engineering experience in Thane, India, Delco offers standard and customized mechanical options for global OEM requirements.
| Specification Parameter | Standard Engineering Range | OEM Customization Capabilities |
|---|---|---|
| Impeller Diameter Range | 133 mm ø to 400 mm ø | Custom diameters, inlet cones, and mounting plates |
| Power Supply / Phase | Single Phase 230V AC (50Hz / 60Hz) | Three Phase 415V or customized EC drive integration |
| Motor Construction | External Rotor Motor / AC FHP Drive | Specialized winding configurations & voltage taps |
| Insulation Class | Class F / Class H | High-temperature insulation options available |
| Bearing Configuration | Permanently lubricated, double-shielded ball bearings | Extended temperature range bearing grease |
| Thermal Protection | Internal automatic reset thermal overload protector | External lead terminals or custom thermistors |
| Duty Cycle & Protection | Continuous Duty (S1), IP44 / IP54 Rated | Custom IP ratings for moisture and dust exposure |
Our backward curved fans are tailored to satisfy international efficiency standards, reducing power consumption while increasing system airflow.
Curved blade geometry converts rotational velocity into static pressure efficiently, overcoming duct, filter, and plenum resistance.
Unlike forward-curved blowers, power draw peaks safely, preventing motor burnout during sudden drops in static resistance.
In-house dynamic balancing minimizes vibration levels, ensuring whisper-quiet operation in sensitive medical and commercial spaces.
The integrated external rotor structure places the motor inside the impeller hub, dramatically decreasing system cabinet footprint.
Compatible with voltage regulation, TRIAC, or frequency drives to allow precise volumetric airflow adjustments.
Manufactured and tested entirely in-house at our Thane facility, ensuring strict quality control and repeatable batch consistency.
Engineered for clean air handling systems, industrial machinery, and HVAC equipment operating under continuous duty.
Ideal for supply and return air circulation, fan coils, rooftop units, and ducted commercial ventilation.
Delivers steady pressure required to overcome HEPA/ULPA filter resistance while maintaining strict noise limits.
Protects power cabinets, variable frequency drives (VFDs), and telecommunications shelters from heat accumulation.
Pushes uniform airflow across cooling coils, industrial heat exchangers, process ovens, and de-humidification lines.
Direct answers from Delco's engineering desk for international equipment manufacturers.
Share your target duty point — static pressure, required CFM/m³/h, operating voltage, and dimensional limits — and our engineering team will provide a tailored technical proposal.