High-Volume Dual Airway Centrifugal Blowers for OEM Engineering
Engineered specifically for continuous-duty applications demanding high airflow displacement against low-to-medium static pressures. Operating with an external rotor motor design, Delco Double Inlet Centrifugal Blowers feature symmetrical dual-sided impellers that optimize volumetric performance while maintaining acoustic quietness and thermal balance.
Drawing air simultaneously from both lateral inlets of the scroll housing, this series balances axial aerodynamic forces across the drive assembly. This symmetry significantly decreases radial bearing stress, resulting in quieter operation, reduced mechanical vibration, and an extended operational lifespan across rigorous industrial cycles.
Technical Specifications Matrix
| Parameter | Standard Specification Range | OEM Customization Options |
|---|---|---|
| Impeller Diameter Range | 133 mm ø to 180 mm ø | Custom widths and blade pitch engineering |
| Motor Type Integration | External Rotor AC Motor / EC Drive Option | Single-phase or 3-phase high-efficiency coils |
| Voltage / Frequency | 230V AC, 50Hz / 60Hz | 115V, 230V, 400V dual-frequency capability |
| Bearings & Lubrication | Dual Precision Sealed Ball Bearings | High-temperature lubricants for extended S1 duty |
| Insulation Rating | Class B / Class F Standard | Class H thermal protection with auto-reset cutouts |
| Housing Material | Galvanized Sheet Steel / Die-Cast Aluminium | Custom epoxy powder coating, anti-corrosive finishes |
Core Engineering & Architectural Advantages
Dual-Symmetrical Air Intake
Balanced airflow from both sides increases volumetric efficiency while neutralizing shaft end-thrust on the bearings.
Low Acoustic & Vibration Profile
Dynamically balanced rotor-impeller assemblies ensure smooth rotation below 62 dBA, adhering to strict noise emission limits.
Compact Direct-Drive Footprint
Integrated external rotor design eliminates belt drives, saving critical spatial volume inside compact Air Handling Units (AHUs).
Continuous Duty Thermal Resilience
Optimum motor cooling via process airflow delivers reliable continuous duty (S1) performance under elevated ambient temperatures.
OEM Customization & Export Support
With five decades of shop-floor manufacturing experience, Delco Fans works directly with international procurement teams and equipment designers. We adapt standard fan geometries to match your physical envelope and electrical specifications:
- Custom discharge mounting flange orientations and hole patterns
- Specific lead wire lengths, terminal blocks, and sealed conduit connectors
- Integration of Electronically Commutated (EC) drives for variable speed control
- In-house air bench validation for system resistance matching
Target Industry Applications
HVAC & Air Handling Units (AHUs)
Primary supply and return blowers for commercial air conditioning, fan coils, and rooftop units.
Cleanroom & Filtration Plenums
High-volume air circulation through HEPA and ULPA filtration systems requiring stable pressure profiles.
Machinery & Panel Cooling
Forced-convection heat dissipation for heavy industrial enclosures, frequency drives, and automation cabinets.
Fume Extraction & Processing Lines
Dust extraction, food dehydration equipment, textile processing airflow, and industrial drying tunnels.
Need Full Technical Datasheets & CAD Models?
Download full engineering dimensional drawings and motor performance curves for our double inlet blowers.