Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (10 here, rated 230 V). Data version: catalogue 2026-08. 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.
- ImpellerØ175 mm6.9 in
- Max airflow741.6 m³/h436 CFM
- Max static pressure535.6 Pa2.15 in. wg
- Voltage230 V
- Speed3,300 rpm
- Input power85 W
- Noise72 dB(A)
LWBE3G175-072NS-03 EC Backward Curved Centrifugal Fan Ø175 mm
Ø175 mm | EC | Max airflow 741.6 m³/h | Max static pressure 535.6 Pa | 72 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · ETL · RoHS
All files for LWBE3G175-072NS-034 files · direct download
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Proven in: AHU & ventilation unit fans · CRAH FanGrid retrofit · Heat pump fan programme — all case studies on longwellfans.com
Cross-reference: same impeller size class as ebm-papst K3G175, ebm-papst R3G175 — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.
Typical applications: Air conditioning · Air handling units · FanGrid arrays · FFU / EFU — all industries
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.
LWBE3G175-072NS-03 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø175 mm, rated 230 V EC, maximum airflow 741.6 m³/h, maximum static pressure 535.6 Pa, noise 72 dB(A), input power 85 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 | LWBE3G175-072NS-03 |
|---|---|
| Series | LWBE3G175 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 230 V |
| Frequency | 50 Hz |
| Current | 0.65 A |
| Input power | 85 W |
| Speed | 3,300 rpm |
| Max. airflow | 741.6 m³/h |
| Max. airflow (CFM) | 436 CFM |
| Max. static pressure | 535.6 Pa |
| Noise | 72 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -40 ~ 80℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø175 mm |
| Rotor diameter | 72 mm |
| Impeller material | PA6+GF30% ( 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 |
| 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 LWBE3G175: 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 (Ø175 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 | |
|---|---|---|---|---|---|---|---|
| LWBE3G175-072NS-03 this model | 741.6 m³/h | 535.6 Pa | 3,300 rpm | 85 W | 72 dB(A) | 230 V | |
| LWBE3G175-072NU-16 | 535.6 m³/h | 453.2 Pa | 2,800 rpm | 55 W | 65 dB(A) | 115 V | View |
| LWBE3G175-072NS-06 | 535.6 m³/h | 453.2 Pa | 2,800 rpm | 55 W | 65 dB(A) | 230 V | View |
| LWBE3G175-072NU-18 | 700.4 m³/h | 803.4 Pa | 4,400 rpm | 115 W | 74 dB(A) | 115 V | View |
| LWBE3G175-072NS-09 | 700.4 m³/h | 875.5 Pa | 4,800 rpm | 155 W | 75 dB(A) | 230 V | View |
| LWBE3G175-072NS-08 | 700.4 m³/h | 803.4 Pa | 4,400 rpm | 115 W | 74 dB(A) | 230 V | View |
| LWBE3G175-072NU-17 | 741.6 m³/h | 535.6 Pa | 3,300 rpm | 85 W | 72 dB(A) | 115 V | View |
| LWBE3G175-072NU-19 | 911.55 m³/h | 875.5 Pa | 4,760 rpm | 170 W | 71 dB(A) | 115 V | View |
| LWBE3G175-072NS-07 | 911.55 m³/h | 875.5 Pa | 4,760 rpm | 170 W | 71 dB(A) | 230 V | View |
| LWBE3G175-072PS-10 | 924 m³/h | 893 Pa | 5,020 rpm | 132 W | 69 dB(A) | 230 V | View |
| LWBE3G175-072NS-10 | 924 m³/h | 893 Pa | 5,020 rpm | 132 W | 69 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.
Other models in the LWBE3G175 seriesSame impeller, different speed grade or wiring
LWBE3G175-072NS-06Ø175 mm · 535.6 m³/h · 453.2 Pa · ECsame series
LWBE3G175-072NS-08Ø175 mm · 700.4 m³/h · 803.4 Pa · ECsame series
LWBE3G175-072NS-07Ø175 mm · 911.55 m³/h · 875.5 Pa · ECsame series
LWBE3G175-072NS-09Ø175 mm · 700.4 m³/h · 875.5 Pa · ECsame series
LWBE3G175-072NU-16Ø175 mm · 535.6 m³/h · 453.2 Pa · ECsame series
LWBE3G175-072NU-17Ø175 mm · 741.6 m³/h · 535.6 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA2E180-092NS-02Ø180 mm · 494 m³/h · 371 Pa · ACadjacent size
LWFE3G180-092SS-02Ø180 mm · 927 m³/h · 824 Pa · ECadjacent size
LWBA2E180-092NS-01Ø180 mm · 443 m³/h · 335 Pa · ACadjacent size
LWFE3G180-092SS-01Ø180 mm · 948 m³/h · 639 Pa · ECadjacent size
LWBA2E180-092NS-03Ø180 mm · 443 m³/h · 335 Pa · ACadjacent size
LWFD3G180-092SH-01Ø180 mm · 618 m³/h · 618 Pa · DCadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
See all Backward Curved Centrifugal Fans · select by duty point