On August 3, 2026, LONGWELL opened an engineering request for technical specification documentation and sample ordering requirements covering two 250mm AC backward curved centrifugal fan models.
Engineering Specification Comparison
The engineering team documented the ratings and technical features for two distinct motor configurations: a 2-pole unit (LWBA2D250-092NT-16-00) and a 4-pole unit (LWBA4D250-092NT-20-00). Both models feature galvanized sheet steel impellers, IP54 protection ratings, and Class F insulation, designed for 380 VAC nominal input operating at 50/60 Hz.
| Parameter / Feature | LWBA2D250-092NT-16-00 (2-Pole) | LWBA4D250-092NT-20-00 (4-Pole) |
|---|---|---|
| Nominal Voltage | 380 VAC (50/60 Hz) | 380 VAC (50/60 Hz) |
| Speed (rpm) | 2450 / 2550 | 1450 / 1600 |
| Power Input (W) | 150 / 200 | 150 / 200 |
| Current (A) | 0.31 / 0.37 | 0.15 / 0.15 |
| Max Air Flow (m3/h) | 1380 / 1455 | 830 / 950 |
| Max Static Pressure (Pa) | 600 / 750 | 165 / 220 |
| Noise Level LpA [dB(A)] | 70 / 72 | 68 / 70 |
| Impeller Material | Galvanised sheet steel | Galvanised sheet steel |
| Protection / Insulation | IP54 / Class F | IP54 / Class F |
Technical Documentation Output
Engineering deliverables completed technical review on August 4, 2026. Official specification files were compiled for models LWBA2D250-092NT-16-00 and LWBA4D250-092NT-20-00 to support fit and performance evaluation.
For detailed drawing and curve information, refer to the published technical documentation: LWBA2D250-092NT-16-00 Specification Document and LWBA4D250-092NT-20-00 Specification Document.
Request Specifications for Your Application
If your project requires custom AC or EC backward curved centrifugal fans, contact LONGWELL engineers to evaluate your operating requirements. Please provide your required duty point (air volume and static pressure), operating voltage, control type, mounting space, and environmental requirements.
Get in touch via our Contact Page or browse models on the LONGWELL Fan Selector.
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