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.
- ImpellerØ630 mm24.8 in
- Max airflow17,955 m³/h10,688 CFM
- Max static pressure956 Pa3.84 in. wg
- Voltage380 V
- Speed1,210 rpm
- Input power3,320 W4.45 hp
- Noise86.9 dB(A)
LWBA4D630-188NT-03 AC Backward Curved Centrifugal Fan Ø630 mm
Ø630 mm | AC | Max airflow 17,955 m³/h | Max static pressure 956 Pa | 86.9 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · RoHS · ETL on request
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.
Downloads for LWBA4D630-188NT-03
PDFDatasheetNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBA4D630-188NT-03 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø630 mm, rated 380 V AC, maximum airflow 17,955 m³/h, maximum static pressure 956 Pa, noise 86.9 dB(A), input power 3,320 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWBA4D630-188NT-03 |
|---|---|
| Series | LWBA4D630 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 50 Hz |
| Current | 5.87 A |
| Input power | 3,320 W |
| Speed | 1,210 rpm |
| Max. airflow | 17,955 m³/h |
| Max. airflow (CFM) | 10,688 CFM |
| Max. static pressure | 956 Pa |
| Noise | 86.9 dB(A) |
| Ambient temperature | -40 ~ 65 °C |
| Storage temperature | -30 ~ 70℃ |
| Humidity | 0 ~ 85 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø630 mm |
| Rotor diameter | 188 |
| Impeller material | Aluminum Alloy |
| Protection class | IP54 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH. Balancing According to JB/T 9101-1999 requirements G6.3 Vibration of the fan Test method accord with JB/T 8689 Installation method Horizontal or vertical installation Mate |
| 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 LWBA4D630: 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 (Ø630 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 | |
|---|---|---|---|---|---|---|---|
| LWBA4D630-188NT-03 this model | 17,955 m³/h | 956 Pa | 1,210 rpm | 3,320 W | 86.9 dB(A) | 380 V | |
| LWBA8D630-188NT-02 | 9,270 m³/h | 288 Pa | 700 rpm | 700 W | 72 dB(A) | 380 V | View |
| LWBA6D630-188NT-01 | 12,360 m³/h | 494 Pa | 900 rpm | 1,500 W | 80 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
Adjacent sizesOne size up when airflow is short, one size down when it is too much
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