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 mm11.0 in
- Max airflow2,833 m³/h1,667 CFM
- Max static pressure927 Pa3.72 in. wg
- Voltage380 V
- Speed2,900 rpm
- Input power680 W
- Noise80 dB(A)
LWBA2D280-138NT-10 AC Backward Curved Centrifugal Fan Ø280 mm
Ø280 mm | AC | Max airflow 2,833 m³/h | Max static pressure 927 Pa | 80 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.
Need a non-standard size or another format? Ask an engineer or search the download center.
LWBA2D280-138NT-10 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø280 mm, rated 380 V AC, maximum airflow 2,833 m³/h, maximum static pressure 927 Pa, noise 80 dB(A), input power 680 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWBA2D280-138NT-10 |
|---|---|
| Series | LWBA2D280 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 60 Hz |
| Current | 1.6 A |
| Input power | 680 W |
| Speed | 2,900 rpm |
| Max. airflow | 2,833 m³/h |
| Max. airflow (CFM) | 1575/1666 CFM |
| Max. static pressure | 927 Pa |
| Noise | 80 dB(A) |
| Ambient temperature | -30 ~ 60 °C |
| Altitude | < 1000m |
| Impeller diameter | Ø280 mm |
| Rotor diameter | 138 |
| Impeller material | Aluminum Alloy |
| Protection class | IP54 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| Balance grade | According to JB/T 9101-1999 requirements G6.3 |
| Vibration standard | Test method accord with JB/T 8689 |
| Service life | 30,000Hours(L10), At 40 °C room, 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 LWBA2D280: 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 · AC)
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 | |
|---|---|---|---|---|---|---|---|
| LWBA2D280-138NT-10 this model | 2,833 m³/h | 927 Pa | 2,900 rpm | 680 W | 80 dB(A) | 380 V | |
| LWBA4E280-092NS-04 | 1,442 m³/h | 288 Pa | 1,500 rpm | 100 W | 66 dB(A) | 230 V | View |
| LWEA280S(T)M-155E | 1,605 m³/h | 60 Pa | 1,450 rpm | 180 W | — | 220 V | View |
| LWBA2D280-102NT-06 | 1,833 m³/h | 773 Pa | 2,650 rpm | 250 W | 80 dB(A) | 380 V | View |
| LWBA2E280-102NS-05 | 1,833 m³/h | 773 Pa | 2,650 rpm | 250 W | 80 dB(A) | 230 V | View |
| LWFA-E-280-02 | 2,100 m³/h | 220 Pa | — | — | 64 dB(A) | — | View |
| LWBA2D280-102NT-08 | 2,163 m³/h | 773 Pa | 2,700 rpm | 330 W | 80 dB(A) | 380 V | View |
| LWBA2E280-102NS-07 | 2,163 m³/h | 773 Pa | 2,700 rpm | 330 W | 80 dB(A) | 230 V | View |
| LWFA4E280-188NS-02 | 2,284 m³/h | 391.4 Pa | 1,360 rpm | 1,600 W | 77 dB(A) | 220 V | View |
| LWFA6E280-138NS-04 | 2,318 m³/h | 247.2 Pa | 900 rpm | 450 W | 65 dB(A) | 220 V | View |
| LWFA6D280-138NT-03 | 2,318 m³/h | 247.2 Pa | 900 rpm | 450 W | 65 dB(A) | 380 V | View |
| LWFA-E-280-01 | 2,600 m³/h | 490 Pa | — | — | 69 dB(A) | — | View |
| LWBA2D280-138NT-09 | 2,678 m³/h | 917 Pa | 2,750 rpm | 500 W | 78 dB(A) | 380 V | View |
| LWEA280S(T)M-156E | 3,202 m³/h | 232 Pa | 2,900 rpm | 250 W | — | 220 V | View |
| LWFA4D280-188NT-01 | 3,502 m³/h | 463.5 Pa | 1,360 rpm | 1,700 W | 77 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 LWBA2D280 seriesSame impeller, different speed grade or wiring
Adjacent 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
LWBA4E355-102NS-02Ø355 mm · 2,812 m³/h · 515 Pa · ACsimilar duty
LWBA4D355-102NT-06Ø355 mm · 2,812 m³/h · 515 Pa · ACsimilar duty
LWBE3G310-102NS-16Ø310 mm · 2,868.6 m³/h · 630 Pa · ECsimilar duty
LWBE3G310-102PS-02Ø310 mm · 2,869 m³/h · 630 Pa · ECsimilar duty
LWAE3G350SS-5MEW-07Ø350 mm · 2,884 m³/h · 150 Pa · ECsimilar duty
LWAE3G350ST-5MEW-08Ø350 mm · 2,884 m³/h · 150 Pa · ECsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point