Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (10 here, rated 230 V). Data version: catalogue 2026-08. 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.
Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ250 mm9.8 in
- Max airflow2,472 m³/h1,454 CFM
- Max static pressure1,545 Pa6.20 in. wg
- Voltage230 V
- Speed3,650 rpm
- Input power520 W
- Noise85 dB(A)
LWBE3G250-102NS-10 EC Backward Curved Centrifugal Fan Ø250 mm
Ø250 mm | EC | Max airflow 2,472 m³/h | Max static pressure 1,545 Pa | 85 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · ETL · RoHS
PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueEC ( ) EC Backward centrifugal fans #2 · SKU on PDF p. 18
All files for LWBE3G250-102NS-106 files · direct download
PDFFull product catalogue · model on PDF p. 18WEBPDimensional drawingWEBPPerformance curveWEBPWiring diagramPDFDrawing
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Proven in: AHU & ventilation unit fans · CRAH FanGrid retrofit · Heat pump fan programme — all case studies on longwellfans.com
Cross-reference: same impeller size class as ebm-papst K3G250, ebm-papst R3G250 — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.
Typical applications: Air conditioning · Air handling units · FanGrid arrays · FFU / EFU — all industries
Engineering files (on request)
CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.
CAD models contain the blade geometry and are not downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.
Longwell 250mm EC Backward Curved Centrifugal Fan | High Efficiency & Quiet HVAC Motor LWBE3G250-102PS-28 · open in video library
Longwell EC Backward Inclined Centrifugal Fan: Quiet Efficiency, Smart Future | LWBE3G250-102NS-40 · open in video library
Downloads for LWBE3G250-102NS-10
PDFDatasheetPDFFull product catalogue · EC ( ) EC Backward centrifugal fans #2 · model on PDF p. 18 · 27 MBPDFDrawing · 7.7 MBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBE3G250-102NS-10 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø250 mm, rated 230 V EC, maximum airflow 2,472 m³/h, maximum static pressure 1,545 Pa, noise 85 dB(A), input power 520 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 | LWBE3G250-102NS-10 |
|---|---|
| Series | LWBE3G250 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 230 V |
| Frequency | 50 Hz |
| Current | 2.5 A |
| Input power | 520 W |
| Speed | 3,650 rpm |
| Max. airflow | 2,472 m³/h |
| Max. airflow (CFM) | 1,454 CFM |
| Max. static pressure | 1,545 Pa |
| Noise | 85 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -40 ~ 80℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø250 mm |
| Rotor diameter | 102 mm |
| Impeller material | Aluminum Alloy ( Impeller ) Bearing Maintenance-free deep groove ball bearings Weight APPROX 5.2 (Kg) Electrical Protection Speed Control Control input 0~10VDC/PWM/RS485 VSP Control Control signal VSP voltage range1VDC~9 |
| Protection class | IP55 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH. Balancing According to JB/T 9101-1999 requirements G6.3 Vibration of the fan Test method accord with JB/T 8689 Installation method Horizontal or vertical installation Mate |
| 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 LWBE3G250: 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 (Ø250 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 | |
|---|---|---|---|---|---|---|---|
| LWBE3G250-102NS-10 this model | 2,472 m³/h | 1,545 Pa | 3,650 rpm | 520 W | 85 dB(A) | 230 V | |
| LWBE3G250-072PS-15 | 1,215 m³/h | 391 Pa | 2,150 rpm | 90 W | 68 dB(A) | 230 V | View |
| LWBE3G250-092PS-21 | 1,421 m³/h | 556 Pa | 2,600 rpm | 170 W | 69 dB(A) | 230 V | View |
| LWBE3G250-072PS-17 | 1,421 m³/h | 639 Pa | 2,760 rpm | 140 W | 77 dB(A) | 230 V | View |
| LWBE3G250-092NS-23 | 1,421 m³/h | 556 Pa | 2,600 rpm | 170 W | 69 dB(A) | 230 V | View |
| LWBE3G250-102PS-22 | 1,524 m³/h | 773 Pa | 3,150 rpm | 240 W | 78 dB(A) | 230 V | View |
| LWBE3G250-102NS-24 | 1,524 m³/h | 773 Pa | 3,150 rpm | 240 W | 78 dB(A) | 230 V | View |
| LWBE3G250-092PS-16 | 1,531 m³/h | 785 Pa | 3,010 rpm | 140 W | 72.1 dB(A) | 230 V | View |
| LWBE3G250-102PS-24 | 1,700 m³/h | 1,082 Pa | 3,500 rpm | 370 W | 82 dB(A) | 230 V | View |
| LWBE3G250-102NS-26 | 1,700 m³/h | 1,082 Pa | 3,500 rpm | 370 W | 82 dB(A) | 230 V | View |
| LWBE3G250-092PS-20 | 1,730 m³/h | 525 Pa | 2,500 rpm | 145 W | 74 dB(A) | 230 V | View |
| LWBE3G250-092NS-22 | 1,730 m³/h | 525 Pa | 2,500 rpm | 145 W | 74 dB(A) | 230 V | View |
| LWBE3G250-102PS-23 | 1,751 m³/h | 824 Pa | 3,170 rpm | 270 W | 84 dB(A) | 230 V | View |
| LWBE3G250-102NS-25 | 1,751 m³/h | 824 Pa | 3,170 rpm | 270 W | 84 dB(A) | 230 V | View |
| LWFE3G250-102PT-08 | 3,708 m³/h | 1,751 Pa | 3,860 rpm | 1,000 W | 92 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.
Other models in the LWBE3G250 seriesSame impeller, different speed grade or wiring
LWBE3G250-072NS-08Ø250 mm · 1,184.5 m³/h · 618 Pa · ECsame series
LWBE3G250-072NS-18Ø250 mm · 1,236 m³/h · 515 Pa · ECsame series
LWBE3G250-072NS-09Ø250 mm · 1,478.05 m³/h · 927 Pa · ECsame series
LWBE3G250-072NU-34Ø250 mm · 1,478.05 m³/h · 927 Pa · ECsame series
LWBE3G250-072NU-32Ø250 mm · 1,184.5 m³/h · 618 Pa · ECsame series
LWBE3G250-072NU-33Ø250 mm · 1,236 m³/h · 515 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBE3G270-092NS-02Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent size
LWBE3G270-092NU-01Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent size
LWBE3G225-092PS-07Ø225 mm · 1,630 m³/h · 839 Pa · ECadjacent size
LWBA2E225-092NS-01Ø225 mm · 618 m³/h · 165 Pa · ACadjacent size
LWBA2E225-092NS-10Ø225 mm · 1,257 m³/h · 695 Pa · ACadjacent size
LWBE3G225-092NS-12Ø225 mm · 1,545 m³/h · 731 Pa · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWFA4D250-138ST-02Ø250 mm · 2,472 m³/h · 391.4 Pa · ACsimilar duty
LWBE3G250-102NU-36Ø250 mm · 2,472 m³/h · 1,463 Pa · ECsimilar duty
LWBE3G280-102NS-15Ø280 mm · 2,472 m³/h · 1,051 Pa · ECsimilar duty
LWBE3G355-092NS-19Ø355 mm · 2,472 m³/h · 350.2 Pa · ECsimilar duty
LWBE3G280-102PS-18Ø280 mm · 2,472 m³/h · 1,051 Pa · ECsimilar duty
LWBE3G355-092PS-15Ø355 mm · 2,472 m³/h · 350 Pa · ECsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point