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.
- ImpellerØ140 mm5.5 in
- Max airflow494 m³/h291 CFM
- Max static pressure845 Pa3.39 in. wg
- Voltage230 V
- Speed2,060 rpm
- Input power115 W
- Noise74 dB(A)
LWFE3G140-072NS-02 EC Forward Curved Centrifugal Fan Ø140 mm
Ø140 mm | EC | Max airflow 494 m³/h | Max static pressure 845 Pa | 74 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
LWFE3G140-072NS-02 — construction, airflow path and running condition.
LWFE3G140-072NS-02 EC Forward Curved Centrifugal Fan | Product Overview · open in video library
Need a non-standard size or another format? Ask an engineer or search the download center.
LWFE3G140-072NS-02 is a LONGWELL EC Forward Curved Centrifugal Fan from the Forward Curved Centrifugal Fans range, impeller Ø140 mm, rated 230 V EC, maximum airflow 494 m³/h, maximum static pressure 845 Pa, noise 74 dB(A), input power 115 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 | LWFE3G140-072NS-02 |
|---|---|
| Series | LWFE3G140 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 230 V |
| Frequency | 50 Hz |
| Current | 0.85 A |
| Input power | 115 W |
| Speed | 2,060 rpm |
| Max. airflow | 494 m³/h |
| Max. airflow (CFM) | 291 CFM |
| Max. static pressure | 845 Pa |
| Noise | 74 dB(A) |
| Ambient temperature | -30 ~ 60 °C |
| Storage temperature | -30 ~ 70℃ |
| Humidity | 0 ~ 85 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø140 mm |
| Rotor diameter | 72 |
| Impeller material | Galvanised sheet steel ( Impeller ) |
| Protection class | IP55 |
| Insulation class | B |
| 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 |
| Speed control | Control input 0~10VDC/PWM |
| Control signal | Control signal VSP voltage range1±0.1VDC~9.5±0.2VDC(During normal operation, when the VSP voltage is below 1.0±0.1VDC, the motor switches from operating mode to standby mode) |
| Speed feedback | Tach output: 2 Pulse/R; FG internal open circuit output, external pull-up resistor R, pull-up voltage V+ |
| Auxiliary output | Output 10VDC, Max Current 10 mA |
| Protection functions | Current limiting protection , Over-temperature protection, Over-current protectionLocked-rotor protection’ , Input power supply lacks phase protection |
| Soft start | Delay time <30 seconds to full speed |
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 LWFE3G140: 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 (Ø140 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 | |
|---|---|---|---|---|---|---|---|
| LWFE3G140-072NS-02 this model | 494 m³/h | 845 Pa | 2,060 rpm | 115 W | 74 dB(A) | 230 V | |
| LWFE3G140-072SS-01 | 453 m³/h | 783 Pa | 1,860 rpm | 85 W | 72 dB(A) | 230 V | View |
| LWFE3G140-072NS-01 | 484 m³/h | 216 Pa | 1,910 rpm | 70 W | 72 dB(A) | 230 V | View |
| LWFE3G140-072SS-02 | 505 m³/h | 881 Pa | 1,900 rpm | 85 W | 61 dB(A) | 230 V | View |
| LWFE3G140-072SS-04 | 597 m³/h | 979 Pa | 2,130 rpm | 110 W | 65 dB(A) | 230 V | View |
| LWFE3G140-072SS-03 | 597 m³/h | 979 Pa | 2,030 rpm | 110 W | 65 dB(A) | 230 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 LWFE3G140 seriesSame impeller, different speed grade or wiring
LWFE3G140-072SS-01Ø140 mm · 453 m³/h · 783 Pa · ECsame series
LWFE3G140-072SS-02Ø140 mm · 505 m³/h · 881 Pa · ECsame series
LWFE3G140-072SS-03Ø140 mm · 597 m³/h · 979 Pa · ECsame series
LWFE3G140-072SS-04Ø140 mm · 597 m³/h · 979 Pa · ECsame series
LWFE3G140-072NS-01Ø140 mm · 484 m³/h · 216 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWFA2E146-092DS-04Ø146 mm · 948 m³/h · 597 Pa · ACadjacent size
LWFA2E146-092DS-08Ø146 mm · 639 m³/h · 536 Pa · ACadjacent size
LWFA2E146-092DS-07Ø146 mm · 479 m³/h · 391 Pa · ACadjacent size
LWFA2E146-092DS-05Ø146 mm · 927 m³/h · 515 Pa · ACadjacent size
LWFA2E146-092DS-02Ø146 mm · 700 m³/h · 515 Pa · ACadjacent size
LWFA2E146-092DS-01Ø146 mm · 742 m³/h · 453 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWFA2E150-092SS-02Ø150 mm · 494 m³/h · 639 Pa · ACsimilar duty
LWFD3G160-072SZ-01Ø160 mm · 494 m³/h · 649 Pa · DCsimilar duty
LWBA2E155-092NS-02Ø155 mm · 494 m³/h · 278 Pa · ACsimilar duty
LWBA2E180-092NS-02Ø180 mm · 494 m³/h · 371 Pa · ACsimilar duty
LWBA4E190-092NS-07Ø190 mm · 494 m³/h · 350 Pa · ACsimilar duty
LWDA-160S-MBN-04Ø160 mm · 494 m³/h · 336 Pa · ACsimilar dutySee all Centrifugal Fans · select by duty point