Series catalogue
PDFLWFA LWFA Series Direct Driven centrifugal blower · 1.4 MBCovers the whole series, not only this model.
Need a non-standard size or another format? Ask an engineer or search the download center.
- ImpellerØ250 mm
- Max airflow2,472 m³/h
- Max static pressure391.4 Pa
- Voltage380 V
- Speed1,300 rpm
- Input power630 W
- Noise74 dB(A)
LWFA4D250-138ST-02 AC Single Inlet Forward Centrifugal Blower Ø250 mm
Ø250 mm | AC | Max airflow 2,472 m³/h | Max static pressure 391.4 Pa | 74 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
LWFA4D250-138ST-02 is a LONGWELL AC Single Inlet Forward Centrifugal Blower from the Single Inlet Forward Curved Blowers range, impeller Ø250 mm, rated 380 V AC, maximum airflow 2,472 m³/h, maximum static pressure 391.4 Pa, noise 74 dB(A), input power 630 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWFA4D250-138ST-02 |
|---|---|
| Series | LWFA4D250 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 50 Hz |
| Current | 1.2 A |
| Input power | 630 W |
| Speed | 1,300 rpm |
| Max. airflow | 2,472 m³/h |
| Max. static pressure | 391.4 Pa |
| Noise | 74 dB(A) |
| Ambient temperature | -30 ~ 60 °C |
| Impeller diameter | Ø250 mm |
| Rotor diameter | 138 |
| Impeller material | Galvanised sheet steel |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
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 LWFA4D250: 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 · 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 | |
|---|---|---|---|---|---|---|---|
| LWFA4D250-138ST-02 this model | 2,472 m³/h | 391.4 Pa | 1,300 rpm | 630 W | 74 dB(A) | 380 V | |
| LWA-250(10")U(S)M-01 | 28 m³/h | see curve | 1,350 rpm | 80 W | — | 110-120 V | View |
| LWA-250(10")U(S)M-02 | 48 m³/h | see curve | 2,800 rpm | 230 W | — | 110-120 V | View |
| LWDA-250S-MBN-10 | 1,034 m³/h | 515 Pa | 2,615 rpm | 165 W | 71 dB(A) | 230 V | View |
| LWDA-250 (10")U-MWN-01 | 1,219 m³/h | see curve | 3,000 rpm | 228 W | 69 dB(A) | 110-120 V | View |
| LWDA-250 (10")U-MWN-03 | 1,219 m³/h | see curve | 3,000 rpm | 228 W | 62 dB(A) | 110-120 V | View |
| LWDA-250(8'')S-PWN-05 | 1,600 m³/h | 420 Pa | 2,500 rpm | 175 W | 50 dB(A) | 230 V | View |
| LWFA6E250-102NS-04 | 1,751 m³/h | 164.8 Pa | 900 rpm | 320 W | 62 dB(A) | 220 V | View |
| LWFA6D250-102NT-03 | 1,751 m³/h | 164.8 Pa | 910 rpm | 320 W | 62 dB(A) | 380 V | View |
| LWDA-250 (10")S-MWN-02 | 1,900 m³/h | see curve | 2,750 rpm | 162 W | 68 dB(A) | 220-240 V | View |
| LWDA-250 (10")S-MWN-04 | 1,900 m³/h | see curve | 2,750 rpm | 162 W | 60 dB(A) | 220-240 V | View |
| LWFA-E-250-02 | 2,100 m³/h | 215 Pa | — | — | 64 dB(A) | — | View |
| LWA-250(10")U(S)M-03 | 2,100 m³/h | 215 Pa | 2,800 rpm | 250 W | — | 110-120 V | View |
| LWDA-250(10")S-MWN-06 | 2,100 m³/h | 215 Pa | 2,800 rpm | 100 W | 65 dB(A) | 220 V | View |
| LWFA-E-250-01 | 2,500 m³/h | 380 Pa | — | — | 70 dB(A) | — | 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 LWFA4D250 seriesSame impeller, different speed grade or wiring
Adjacent 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
LWBE3G250-102NS-10Ø250 mm · 2,472 m³/h · 1,545 Pa · ECsimilar 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
LWFE3G250-102PS-06Ø250 mm · 2,472 m³/h · 1,545 Pa · ECsimilar duty
LWBE3G280-102PS-18Ø280 mm · 2,472 m³/h · 1,051 Pa · ECsimilar dutySee all Centrifugal Fans · select by duty point