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.
- ImpellerØ280 mm
- Max airflow2,317.5 m³/h
- Max static pressure556.2 Pa
- Voltage115 V
- Speed1,910 rpm
- Input power170 W
- Noise73 dB(A)
LWBE3G280-072NU-21 EC Backward Curved Centrifugal Fan Ø280 mm
Ø280 mm | EC | Max airflow 2,317.5 m³/h | Max static pressure 556.2 Pa | 73 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Need a non-standard size or another format? Ask an engineer or search the download center.
LWBE3G280-072NU-21 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø280 mm, rated 115 V EC, maximum airflow 2,317.5 m³/h, maximum static pressure 556.2 Pa, noise 73 dB(A), input power 170 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 | LWBE3G280-072NU-21 |
|---|---|
| Series | LWBE3G280 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 115 V |
| Frequency | 50 Hz |
| Current | 2.4 A |
| Input power | 170 W |
| Speed | 1,910 rpm |
| Max. airflow | 2,317.5 m³/h |
| Max. static pressure | 556.2 Pa |
| Noise | 73 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Impeller diameter | Ø280 mm |
| Rotor diameter | 72 |
| Impeller material | Aluminum Alloy |
| Protection class | IP55 |
| Insulation class | F |
| 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 LWBE3G280: 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 (Ø280 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 | |
|---|---|---|---|---|---|---|---|
| LWBE3G280-072NU-21 this model | 2,317.5 m³/h | 556.2 Pa | 1,910 rpm | 170 W | 73 dB(A) | 115 V | |
| LWBE3G280-092PS-14 | 1,743 m³/h | 481 Pa | 2,200 rpm | 105 W | 69 dB(A) | 230 V | View |
| LWBE3G280-092PS-15 | 1,813 m³/h | 680 Pa | 2,600 rpm | 165 W | 74 dB(A) | 230 V | View |
| LWFE3G280-092PS-03 | 2,008.5 m³/h | 803.4 Pa | 2,650 rpm | 225 W | 70 dB(A) | 230 V | View |
| LWBE3G280-092PS-13 | 2,019 m³/h | 546 Pa | 2,200 rpm | 180 W | 72 dB(A) | 230 V | View |
| LWFE3G280-072PS-01 | 2,317.5 m³/h | 556.2 Pa | 1,910 rpm | 170 W | 73 dB(A) | 230 V | View |
| LWBE3G280-102PS-16 | 2,318 m³/h | 824 Pa | 2,760 rpm | 340 W | 78 dB(A) | 230 V | View |
| LWBE3G280-102PS-18 | 2,472 m³/h | 1,051 Pa | 3,100 rpm | 475 W | 82 dB(A) | 230 V | View |
| LWBE3G280-138PT-05 | 3,028 m³/h | 886 Pa | 3,000 rpm | 860 W | 85 dB(A) | 400 V | View |
| LWBE3G280-102PS-19 | 3,039 m³/h | 1,102 Pa | 3,000 rpm | 625 W | 82 dB(A) | 230 V | View |
| LWFE3G280-102PS-07 | 3,193 m³/h | 1,442 Pa | 3,000 rpm | 500 W | 75 dB(A) | 230 V | View |
| LWBE3G280-138PT-06 | 3,790 m³/h | 1,421 Pa | 3,500 rpm | 1,355 W | 89 dB(A) | 400 V | View |
| LWBE3G280-138NT-18 | 3,790 m³/h | 1,421 Pa | 3,500 rpm | 1,355 W | 89 dB(A) | 400 V | View |
| LWFE3G280-102PS-04 | 3,862.5 m³/h | 1,658 Pa | 3,270 rpm | 700 W | 85 dB(A) | 230 V | View |
| LWFE3G280-102PT-08 | 4,377.5 m³/h | 1,751 Pa | 3,370 rpm | 1,100 W | 78 dB(A) | 400 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 LWBE3G280 seriesSame impeller, different speed grade or wiring
LWBE3G280-072NS-12Ø280 mm · 2,317.5 m³/h · 556.2 Pa · ECsame series
LWBE3G280-092NS-11Ø280 mm · 2,008.5 m³/h · 803.4 Pa · ECsame series
LWBE3G280-102NS-06Ø280 mm · 3,862.5 m³/h · 1,658 Pa · ECsame series
LWBE3G280-102NS-16Ø280 mm · 3,193 m³/h · 1,442 Pa · ECsame series
LWBE3G280-102NT-17Ø280 mm · 4,377.5 m³/h · 1,751 Pa · ECsame series
LWBE3G280-102NU-22Ø280 mm · 3,090 m³/h · 1,236 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBE3G270-092NU-01Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent size
LWBE3G270-092NS-02Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent size
LWFA6E300-138DS-01Ø300 mm · 1,596 m³/h · 368 Pa · ACadjacent size
LWBE3G310-072NS-21Ø310 mm · 2,266 m³/h · 618 Pa · ECadjacent size
LWBE3G310-092NS-22Ø310 mm · 2,678 m³/h · 607.7 Pa · ECadjacent size
LWBE3G310-092NU-28Ø310 mm · 2,678 m³/h · 607.7 Pa · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWFE3G280-072PS-01Ø280 mm · 2,317.5 m³/h · 556.2 Pa · ECsimilar duty
LWAA2E250S-7MEB-16Ø250 mm · 2,318 m³/h · ACsimilar duty
LWBA4E315-138NS-13Ø315 mm · 2,318 m³/h · 371 Pa · ACsimilar duty
LWBA4D315-138NT-15Ø315 mm · 2,318 m³/h · 371 Pa · ACsimilar duty
LWFA6D280-138NT-03Ø280 mm · 2,318 m³/h · 247.2 Pa · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point