Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade. The system resistance curve depends on the actual ductwork — confirm the operating point on site. Need an engineer to verify the duty point? Contact us or add the model to your RFQ and note the duty point.
- ImpellerØ450 mm17.7 in
- Max airflow5,050 m³/h2,972 CFM
- Max static pressure417 Pa1.67 in. wg
- Voltage230 V
- Speed1,400 rpm
- Input power320 W
- Noise68 dB(A)
LWBE3G450-102NS-21 EC Backward Curved Centrifugal Fan Ø450 mm
Ø450 mm | EC | Max airflow 5,050 m³/h | Max static pressure 417 Pa | 68 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Downloads for LWBE3G450-102NS-21
PDFDatasheet · 80 KBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBE3G450-102NS-21 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø450 mm, rated 230 V EC, maximum airflow 5,050 m³/h, maximum static pressure 417 Pa, noise 68 dB(A), input power 320 W. The EC motor integrates the drive electronics: stepless speed control by 0–10 V or PWM signal, speed feedback and high efficiency at part load.
Technical data
| Model | LWBE3G450-102NS-21 |
|---|---|
| Series | LWBE3G450 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 230 V |
| Frequency | 50 Hz |
| Current | 1.45 A |
| Input power | 320 W |
| Speed | 1,400 rpm |
| Max. airflow | 5,050 m³/h |
| Max. static pressure | 417 Pa |
| Noise | 68 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Impeller diameter | Ø450 mm |
| Rotor diameter | 102 |
| Impeller material | Aluminum Alloy |
| Protection class | IP44 |
| Insulation class | B |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| Rotation | Clockwise,seen on rotor |
Typical applications
- Air handling units (AHU) and rooftop units (RTU)
- Data-center CRAH / CRAC units and fan walls
- Dust extraction and process ventilation
- Fan filter units and air purifiers
Series LWBE3G450: models in the same series share the impeller and motor platform and differ in speed grade, voltage or lead-out / terminal-box configuration — compare them in the table below or ask for the best fit at your duty point.
Nameplate values: maximum airflow is measured at zero static pressure and maximum static pressure at zero airflow; the two never occur together. Confirm the operating point on the performance curve. Final selection is subject to the duty point (airflow / static pressure / voltage / control mode) and project verification.
Alternatives with the same impeller (Ø450 mm · EC)
Same impeller, different speed grade, power or wiring. Step up for more airflow, step down for lower noise.
| Model | Max airflow | Max static pressure | Speed | Power | Noise | Voltage | |
|---|---|---|---|---|---|---|---|
| LWBE3G450-102NS-21 this model | 5,050 m³/h | 417 Pa | 1,400 rpm | 320 W | 68 dB(A) | 230 V | |
| LWBE3G450-138PT-12 | 5,329 m³/h | 452 Pa | 1,200 rpm | 386 W | — | 400 V | View |
| LWBE3G450-138PT-13 | 7,182 m³/h | 730 Pa | 1,610 rpm | 900 W | — | 400 V | View |
| LWBE3G450-188PT-07 | 7,425 m³/h | 1,568 Pa | 2,400 rpm | 1,590 W | — | 400 V | View |
| LWBE3G450-188NT-15 | 7,425 m³/h | 1,568 Pa | 2,400 rpm | 1,590 W | 70 dB(A) | 400 V | View |
| LWFE3G450-102PS-11 | 7,467.5 m³/h | 1,030 Pa | 1,450 rpm | 700 W | 70 dB(A) | 230 V | View |
| LWBE3G450-138PT-04 | 7,828 m³/h | 824 Pa | 1,720 rpm | 910 W | 79 dB(A) | 400 V | View |
| LWBE3G450-188PT-08 | 8,019 m³/h | 1,802 Pa | 2,600 rpm | 2,060 W | — | 400 V | View |
| LWBE3G450-188NT-16 | 8,019 m³/h | 1,802 Pa | 2,600 rpm | 2,060 W | 74 dB(A) | 400 V | View |
| LWFE3G450-102PT-06 | 8,652 m³/h | 1,390.5 Pa | 1,500 rpm | 1,100 W | 85 dB(A) | 400 V | View |
| LWBE3G450-188PT-09 | 8,661 m³/h | 2,114 Pa | 2,800 rpm | 2,595 W | — | 400 V | View |
| LWBE3G450-188NT-17 | 8,661 m³/h | 2,114 Pa | 2,800 rpm | 2,595 W | 85 dB(A) | 400 V | View |
| LWBE3G450-188PT-16 | 8,985 m³/h | 840 Pa | 2,600 rpm | 2,400 W | — | 400 V | View |
| LWBE3G450-188NT-22 | 10,752 m³/h | 1,669 Pa | 2,400 rpm | 2,400 W | 92 dB(A) | 380 V | View |
| LWBE3G450-188NT-21 | 12,647 m³/h | 2,342 Pa | 2,800 rpm | 4,600 W | 96 dB(A) | 380 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Related products
Other models in the LWBE3G450 seriesSame impeller, different speed grade or wiring
LWBE3G450-102NS-19Ø450 mm · 7,467.5 m³/h · 1,030 Pa · ECsame series
LWBE3G450-102NT-20Ø450 mm · 8,652 m³/h · 1,390.5 Pa · ECsame series
LWBE3G450-138NT-08Ø450 mm · 7,828 m³/h · 824 Pa · ECsame series
LWBE3G450-138NT-11Ø450 mm · 5,329 m³/h · 452 Pa · ECsame series
LWBE3G450-138NT-12Ø450 mm · 7,182 m³/h · 730 Pa · ECsame series
LWBE3G450-188NT-14Ø138 mm · 8,985 m³/h · 840 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA4D400-138NT-10Ø400 mm · 4,120 m³/h · 494 Pa · ACadjacent size
LWBE3G500-188NT-10Ø500 mm · 13,472 m³/h · 1,541 Pa · ECadjacent size
LWBA4D400-138NT-08Ø400 mm · 4,532 m³/h · 494 Pa · ACadjacent size
LWBA4E400-138NS-09Ø400 mm · 4,120 m³/h · 494 Pa · ACadjacent size
LWBE3G500-188NT-08Ø500 mm · 14,214 m³/h · 886 Pa · ECadjacent size
LWBA4D400-138NT-11Ø400 mm · 5,082 m³/h · 504 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWFE3G355-102PS-03Ø355 mm · 5,047 m³/h · 1,009.4 Pa · ECsimilar duty
LWBE3G355-102NS-11Ø355 mm · 5,047 m³/h · 1,009.4 Pa · ECsimilar duty
LWMFAF400-01Ø400 mm · 5,100 m³/h · 1,390 Pa · ACsimilar duty
LWFA-E-400-02Ø400 mm · 5,100 m³/h · 610 Pa · ACsimilar duty
LWAA4D400S-5MEB-12Ø400 mm · 5,150 m³/h · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point