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.
- ImpellerØ250 mm9.8 in
- Max airflow3,708 m³/h2,182 CFM
- Max static pressure1,751 Pa7.03 in. wg
- Voltage380 V
- Speed3,860 rpm
- Input power1,000 W1.34 hp
- Noise92 dB(A)
LWBE3G250-102NT-21 EC Backward Curved Centrifugal Fan Ø250 mm
Ø250 mm | EC | Max airflow 3,708 m³/h | Max static pressure 1,751 Pa | 92 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
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.
Downloads for LWBE3G250-102NT-21
PDFDatasheet · 636 KBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBE3G250-102NT-21 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø250 mm, rated 380 V EC, maximum airflow 3,708 m³/h, maximum static pressure 1,751 Pa, noise 92 dB(A), input power 1,000 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 | LWBE3G250-102NT-21 |
|---|---|
| Series | LWBE3G250 |
| Motor type | EC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 50 Hz |
| Current | 1.6 A |
| Input power | 1,000 W |
| Speed | 3,860 rpm |
| Max. airflow | 3,708 m³/h |
| Max. airflow (CFM) | 2,181 CFM |
| Max. static pressure | 1,751 Pa |
| Noise | 92 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -40 ~ 80℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø250 mm |
| Rotor diameter | 102 |
| Impeller material | Aluminum Alloy ( Impeller ) |
| Protection class | IP55 |
| Insulation class | F |
| Bearing | Maintenance-free deep groove ball bearings |
| Duty | S1 |
| Balance grade | G6.3 |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH |
| 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 | |
|---|---|---|---|---|---|---|---|
| LWBE3G250-102NT-21 this model | 3,708 m³/h | 1,751 Pa | 3,860 rpm | 1,000 W | 92 dB(A) | 380 V | |
| LWBE3G250-072PS-15 | 1,215 m³/h | 391 Pa | 2,150 rpm | 90 W | 68 dB(A) | 230 V | View |
| LWDE-250 (10")U-MWN-01 | 1,219 m³/h | see curve | 3,000 rpm | 195 W | 69 dB(A) | 110-120 V | View |
| LWDE-250 (10")U-MWN-03 | 1,219 m³/h | see curve | 3,000 rpm | 195 W | 62 dB(A) | 110-120 V | View |
| LWDE-250S-MBN-07 | 1,231 m³/h | 1,030 Pa | 2,700 rpm | 170 W | 71 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 |
| LWBE3G250-102PS-22 | 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 |
| LWBE3G250-092PS-20 | 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 |
| LWDE-250 (10")S-MWN-02 | 2,075 m³/h | see curve | 3,000 rpm | 195 W | 69 dB(A) | 220-240 V | View |
| LWDE-250 (10")S-MWN-04 | 2,075 m³/h | see curve | 3,000 rpm | 195 W | 62 dB(A) | 220-240 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.
Related products
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
LWBA2E225-092NS-01Ø225 mm · 618 m³/h · 165 Pa · ACadjacent size
LWFA4D225-138ST-02Ø225 mm · 1,442 m³/h · 288.4 Pa · ACadjacent size
LWBA4E225-092NS-02Ø225 mm · 690 m³/h · 216 Pa · ACadjacent size
LWFA4D225-138NT-01Ø225 mm · 1,648 m³/h · 288.4 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWFE3G250-102PT-08Ø250 mm · 3,708 m³/h · 1,751 Pa · ECsimilar duty
LWCE-1501200SN-06Ø150 mm · 3,700 m³/h · 143 Pa · ECsimilar duty
LWA-300S(T)M-05EØ290 mm · 3,720 m³/h · 300 Pa · ACsimilar duty
LWAA4D350S-5MEB-12Ø350 mm · 3,760 m³/h · ACsimilar duty
LWAA4E350S-5MEB-10Ø350 mm · 3,760 m³/h · ACsimilar duty
LWAA4E350S-5MKB-16Ø350 mm · 3,760 m³/h · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point