Standard AC Centrifugal Fan Specifications
On July 25, 2026, LONGWELL opened a project to prepare technical specifications for standard versions of AC backward curved centrifugal fans under model designations LWBA2D225-092NT-11 and LWBA2D250-092NT-15. Engineering completed the standardized specification outputs LWBA2D225-092NT-11-00 and LWBA2D250-092NT-15-00, which passed technical review on July 27, 2026.
Documented Technical Parameters
The standard technical specifications establish rated operating envelopes and mechanical features for both fan models operating on a nominal 380 VAC supply.
| Parameter | LWBA2D225-092NT-11-00 | LWBA2D250-092NT-15-00 |
|---|---|---|
| Nominal Voltage | 380 VAC (342~418 VAC) | 380 VAC (340~420 VAC) |
| Frequency | 50/60 Hz | 50 Hz |
| Rated Speed | 2600 / 2900 rpm | 2500 rpm |
| Power Input | 135 / 180 W | 180 W |
| Maximum Air Flow | 1133 / 1288 m³/h (666 / 758 CFM) | 1524 m³/h (867 CFM) |
| Maximum Static Pressure | 546 / 695 Pa | 598 Pa |
| Impeller Material | Plastic PA66 | SGCC |
| Protection Type | IP54 | IP44 |
Design Features and Mechanical Construction
Both models feature Class F insulation and maintenance-free deep groove ball bearings with an L10 life expectancy rated at 30,000 hours at 40°C. Thermal protection includes a disconnection threshold between 150°C and 160°C with reset between 100°C and 130°C. Structural balancing is specified according to JB/T 9101-1999 G6.3 standards, and vibration testing conforms to JB/T 8689 requirements.
Discuss a Similar Requirement
If you require tailored technical specifications or selection assistance for AC backward curved centrifugal fans, please share your required duty point (air volume and static pressure), voltage/frequency range, and mounting dimensions at Contact Us or use the LONGWELL Fan Selector.
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