Ultra-Compact Direct-Drive Construction
The external rotor motor resides entirely within the blower impeller, drastically saving axial depth for tight enclosures and HVAC cabinets.
+91 98209 33660
Delco Fans manufactures high-efficiency single inlet centrifugal blowers integrated with external rotor motor technology. Designed with a single-sided axial intake and spiral scroll discharge, these compact blower assemblies are specifically built for restricted space profiles where high static pressure and low aerodynamic turbulence are essential.
By mounting the motor rotor directly inside the impeller hub, mechanical efficiency is maximized while eliminating belt maintenance or external motor overhang. Each unit is constructed in-house at our plant in Thane, India, undergoing strict electrical and air performance testing to ensure long operational lifespan in demanding OEM machinery.
Delco single inlet blowers can be customized to match your exact system resistance curve, electrical supply, and ambient requirements.
| Parameter | Standard Specification Range | OEM Customization Capabilities |
|---|---|---|
| Motor Architecture | AC External Rotor Motor / EC Brushless Motor | Custom winding turns, 115V / 230V, 50Hz / 60Hz single & 3-phase |
| Impeller Type | Forward Curved Metal / Plastic Impeller | Wheel width, blade angle, dynamically balanced to ISO 1940 standard |
| Airflow Rate | 150 CFM to 1,800 CFM (250 m³/h to 3,000 m³/h) | Specific duty-point matching to duct & filter resistance |
| Static Pressure | Up to 850 Pa (3.4 in. wg) | Scroll geometry tuning for low-flow or high-pressure setups |
| Speed & Control | 900 RPM – 2,800 RPM (Fixed or Variable) | Voltage regulator, TRIAC speed control, 0-10V PWM input (EC) |
| Insulation & Protection | Class B (130°C) / Class F (155°C), IP44 / IP54 | Thermal overload protection (TOP), tropicalized varnish dipping |
| Housing Finish | Galvanized Steel / Powder-Coated Sheet Metal | Stainless steel, aluminum, custom mounting flange hole dimensions |
Built on over 50 years of electrical motor and air movement manufacturing experience.
The external rotor motor resides entirely within the blower impeller, drastically saving axial depth for tight enclosures and HVAC cabinets.
Every rotor and impeller is precision-balanced to minimize acoustic noise, shaft runout, and bearing stress during continuous 24/7 duty.
Single inlet geometry draws air cleanly from one directional intake, allowing efficient connection to ducts, filters, or dedicated intake grilles.
Moving air passing through the impeller actively draws thermal energy away from the external rotor surface, maintaining lower coil temperatures.
Pre-lubricated, sealed precision ball bearings ensure reliable operation in high ambient conditions up to +60°C without re-greasing.
Tailored mounting brackets, lead lengths, harness connectors, and voltage configurations designed directly to OEM manufacturing drawings.
Delco single inlet centrifugal blowers perform reliably in applications demanding stable air distribution against system backpressure.
Ducted ventilation, fan coil units, heat recovery ventilators, air purifiers, and laminar flow hoods.
Forced-air heat exchange in high-density drive panels, UPS systems, and power distribution enclosures.
Sterilizers, laboratory incubators, fume extraction units, and medical diagnostic equipment cooling.
Drying tunnels, packaging machines, printing press air supply, and continuous industrial exhaust systems.
At Delco Fans Pvt. Ltd., quality control is embedded into every production stage to safeguard long-term operational performance for international B2B buyers.
Automatic high-density copper winding followed by vacuum pressure impregnation for optimal dielectric strength and thermal resistance.
Rotor-impeller subassemblies undergo dual-plane electronic dynamic balancing to eliminate vibration and bearing fatigue.
Every unit passes high-voltage breakdown, insulation resistance, no-load current, and wattage checks prior to approval.
Performance curves are validated on calibrated wind tunnel test benches to verify airflow against backpressure ratings.
Key technical considerations when selecting single inlet centrifugal blowers with external rotor motors.
Contact our engineering desk for custom drawings, torque-speed curves, airflow test reports, and volume pricing.