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LWFA4D250-138ST-01 product photo
LWFA4D250-138ST-02 product photo
LWFA4D250-138ST-02 product photo
  • ImpellerØ250 mm9.8 in
  • Max airflow3,399 m³/h2,001 CFM
  • Max static pressure391.4 Pa1.57 in. wg
  • Voltage380 V
  • Speed1,350 rpm
  • Input power850 W1.14 hp
  • Noise80 dB(A)

LWFA4D250-138ST-01 AC Single Inlet Forward Centrifugal Blower Ø250 mm

Ø250 mm | AC | Max airflow 3,399 m³/h | Max static pressure 391.4 Pa | 80 dB(A)

SKU: LWFA4D250-138ST-01 Categories: , ,
  • Factory direct
  • OEM / ODM
  • Samples in 1–3 days
  • Production 15–30 days
  • 18-month warranty
  • CE · ETL · RoHS
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Dimensional drawingDimensions in mm. Confirm against the final approval drawing before machining cut-outs.
LWFA4D250-138ST-01 Dimensional drawing
Performance curve (P-Q)Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.
LWFA4D250-138ST-01 Performance curve (P-Q)

Series catalogue

PDFLWFA LWFA Series Direct Driven centrifugal blower · 1.4 MB

Covers the whole series, not only this model.

Need a non-standard size or another format? Ask an engineer or search the download center.

LWFA4D250-138ST-01 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 3,399 m³/h, maximum static pressure 391.4 Pa, noise 80 dB(A), input power 850 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model LWFA4D250-138ST-01
Series LWFA4D250
Motor type AC
Phase 3-phase
Rated voltage 380 V
Frequency 50 Hz
Current 1.6 A
Input power 850 W
Speed 1,350 rpm
Max. airflow 3,399 m³/h
Max. static pressure 391.4 Pa
Noise 80 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.

ModelMax airflowMax static pressureSpeedPowerNoiseVoltage
LWFA4D250-138ST-01 this model 3,399 m³/h391.4 Pa 1,350 rpm850 W80 dB(A)380 V
LWA-250(10")U(S)M-01 28 m³/hsee curve 1,350 rpm80 W—110-120 V View
LWA-250(10")U(S)M-02 48 m³/hsee curve 2,800 rpm230 W—110-120 V View
LWDA-250S-MBN-10 1,034 m³/h515 Pa 2,615 rpm165 W71 dB(A)230 V View
LWDA-250 (10")U-MWN-01 1,219 m³/hsee curve 3,000 rpm228 W69 dB(A)110-120 V View
LWDA-250 (10")U-MWN-03 1,219 m³/hsee curve 3,000 rpm228 W62 dB(A)110-120 V View
LWDA-250(8'')S-PWN-05 1,600 m³/h420 Pa 2,500 rpm175 W50 dB(A)230 V View
LWFA6E250-102NS-04 1,751 m³/h164.8 Pa 900 rpm320 W62 dB(A)220 V View
LWFA6D250-102NT-03 1,751 m³/h164.8 Pa 910 rpm320 W62 dB(A)380 V View
LWDA-250 (10")S-MWN-02 1,900 m³/hsee curve 2,750 rpm162 W68 dB(A)220-240 V View
LWDA-250 (10")S-MWN-04 1,900 m³/hsee curve 2,750 rpm162 W60 dB(A)220-240 V View
LWFA-E-250-02 2,100 m³/h215 Pa ——64 dB(A)— View
LWA-250(10")U(S)M-03 2,100 m³/h215 Pa 2,800 rpm250 W—110-120 V View
LWDA-250(10")S-MWN-06 2,100 m³/h215 Pa 2,800 rpm100 W65 dB(A)220 V View
LWFA-E-250-01 2,500 m³/h380 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

LWFA4D250-102DS-04 product photoLWFA4D250-102DS-04Ø250 mm · 4,161.2 m³/h · 412 Pa · ACsame seriesLWFA4D250-102DS-05 product photoLWFA4D250-102DS-05Ø250 mm · 5,226.75 m³/h · 383.8 Pa · ACsame seriesLWFA4D250-138ST-02 product photoLWFA4D250-138ST-02Ø250 mm · 2,472 m³/h · 391.4 Pa · ACsame seriesLWFA4D250-138NT-01 product photoLWFA4D250-138NT-01Ø250 mm · 2,369 m³/h · 406.85 Pa · ACsame series

Adjacent sizesOne size up when airflow is short, one size down when it is too much

LWBE3G270-092NS-02 product photoLWBE3G270-092NS-02Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent sizeLWBE3G270-092NU-01 product photoLWBE3G270-092NU-01Ø270 mm · 1,545 m³/h · 332 Pa · ECadjacent sizeLWBA2E225-092NS-01 product photoLWBA2E225-092NS-01Ø225 mm · 618 m³/h · 165 Pa · ACadjacent sizeLWFA4D225-138ST-02 product photoLWFA4D225-138ST-02Ø225 mm · 1,442 m³/h · 288.4 Pa · ACadjacent sizeLWBA4E225-092NS-02 product photoLWBA4E225-092NS-02Ø225 mm · 690 m³/h · 216 Pa · ACadjacent sizeLWFA4D225-138NT-01 product photoLWFA4D225-138NT-01Ø225 mm · 1,648 m³/h · 288.4 Pa · ACadjacent size

Alternatives at a similar dutySimilar airflow, different construction or motor platform

LWBA4D355-138NT-11 product photoLWBA4D355-138NT-11Ø355 mm · 3,399 m³/h · 464 Pa · ACsimilar dutyLWBA4E355-138NS-13 product photoLWBA4E355-138NS-13Ø355 mm · 3,399 m³/h · 464 Pa · ACsimilar dutyLWBE3G310-102NU-30 product photoLWBE3G310-102NU-30Ø310 mm · 3,399 m³/h · 979 Pa · ECsimilar dutyLWWAF-3.6A-0.12-4P-1-0033,370 m³/h · ACsimilar dutyLWAA4D350S-5MEB-11 product photoLWAA4D350S-5MEB-11Ø350 mm · 3,348 m³/h · ACsimilar dutyLWAA4D350S-5MKB-15 product photoLWAA4D350S-5MKB-15Ø350 mm · 3,348 m³/h · ACsimilar duty

See all Centrifugal Fans  ·  select by duty point

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