Low-Resistance EC Backward Curved Centrifugal Fan
SZR backward curved EC centrifugal fans are designed to achieve improved aerodynamic efficiency, reduced airflow resistance and stable pressure performance for modern ventilation systems. The backward curved impeller structure minimizes energy loss during air movement while maintaining quieter operation and reliable airflow stability. The series is suitable for HVAC systems, clean air equipment and intelligent ventilation devices.
Aerodynamic Design
The fan wheel adopts precision backward-curved blades engineered to reduce turbulence and improve air movement efficiency.
The EC motor system integrates intelligent electronic commutation technology to optimize speed performance and reduce operational power consumption.
The housing structure is developed using airflow simulation technology to improve pressure distribution and airflow uniformity.
High-precision balancing treatment reduces vibration and improves acoustic performance during operation.
Technical Specifications
|
Parameter |
EC BC 17569 |
EC BC 19075 |
|
Dimension |
175×69 mm |
190×75 mm |
|
Input Voltage |
230V EC |
230V EC |
|
Power Rating |
35-95 W |
55-135 W |
|
Speed Range |
1100-2800 RPM |
1200-3200 RPM |
|
Airflow Volume |
380-760 CFM |
520-980 CFM |
|
Static Pressure |
280-720 Pa |
350-860 Pa |
|
Noise Range |
45-60 dB(A) |
50-65 dB(A) |
|
Bearing Type |
Ball Bearing |
Ball Bearing |
|
Efficiency Control |
PWM Variable Speed |
PWM Variable Speed |
|
Protection Grade |
IP54 |
IP54 / IP65 |
|
Certifications |
CE, RoHS, ERP |
CE, RoHS, ERP |
Design Advantages
• Improved aerodynamic efficiency
• Lower airflow resistance during operation
• Reduced acoustic noise generation
• Stable static pressure characteristics
• Intelligent variable-speed EC control
Common Applications
• Air purification systems
• HVAC air circulation units
• Fresh air ventilation equipment
• Data center cooling systems
• Commercial ventilation devices
• Smart environmental control systems
• Heat recovery equipment
FAQ
Q: Why use backward curved impellers?
A: Backward curved blades improve airflow efficiency while reducing power consumption and turbulence noise.
Q: Can the fan operate with variable-speed control?
A: Yes. EC motor systems support intelligent speed adjustment.
Q: Is the fan suitable for clean air systems?
A: The low-turbulence airflow structure is suitable for controlled ventilation environments.
Q: Are custom dimensions available?
A: SZR supports project-based structural customization and airflow configuration.
Technical Development Support
SZR provides customized backward curved EC fan solutions including aerodynamic optimization, noise reduction engineering and intelligent control integration for advanced ventilation systems.
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