On June 26, 2026, LONGWELL opened a project to issue a standard technical specification sheet for an AC axial fan with a square mounting panel, designated under model number LWAA4D350S-5MKB-22-00. LONGWELL engineering completed the technical evaluation and official specification documentation on June 29, 2026.
Documented Technical Ratings
The LWAA4D350S-5MKB-22-00 AC axial fan is engineered for 380 VAC operation. The documented parameters outlined in the specification document include:
| Parameter | Value / Rating |
|---|---|
| Nominal Voltage | 380 VAC (Range: 342–418 VAC) |
| Frequency | 60 Hz |
| Rated Speed | 1550 rpm |
| Power Input | 180 W |
| Rated Current | 0.5 A |
| Maximum Airflow | 2678 m³/h (1575 CFM) |
| Noise Level (LpA) | 67 dB(A) |
| Insulation Class | Class F |
| Protection Type | IP54 |
| Operating Temperature Range | -30°C to +60°C |
Mechanical configuration
The unit features cold-rolled sheet steel impeller construction and maintenance-free deep groove ball bearings. Mechanical drawings indicate a square mounting panel measuring 410 mm by 410 mm with a 370 mm mounting hole pitch and four 12 mm mounting holes (4-Ø12). The fan assembly has an overall depth of 170 mm, comprising a 40 mm panel front offset and a 130 mm rear body extension, with an outer shroud diameter of 370 mm and an inner duct diameter of 350 mm.
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