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.
- ImpellerØ450 mm17.7 in
- Max airflow7,210 m³/h4,241 CFM
- Max static pressure695 Pa2.79 in. wg
- Voltage380 V
- Speed1,400 rpm
- Input power1,100 W1.47 hp
- Noise82 dB(A)
LWBA4D450-188NT-04 AC Backward Curved Centrifugal Fan Ø450 mm
Ø450 mm | AC | Max airflow 7,210 m³/h | Max static pressure 695 Pa | 82 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · RoHS · ETL on request
Downloads for LWBA4D450-188NT-04
PDFDatasheetNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBA4D450-188NT-04 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø450 mm, rated 380 V AC, maximum airflow 7,210 m³/h, maximum static pressure 695 Pa, noise 82 dB(A), input power 1,100 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWBA4D450-188NT-04 |
|---|---|
| Series | LWBA4D450 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 50 Hz |
| Current | 2.5 A |
| Input power | 1,100 W |
| Speed | 1,400 rpm |
| Max. airflow | 7,210 m³/h |
| Max. airflow (CFM) | 4,241 CFM |
| Max. static pressure | 695 Pa |
| Noise | 82 dB(A) |
| Ambient temperature | -40 ~ 80 °C |
| Storage temperature | -40 ~ 80℃ |
| Humidity | 0 ~ 95 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø450 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 LWBA4D450: 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 (Ø450 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 | |
|---|---|---|---|---|---|---|---|
| LWBA4D450-188NT-04 this model | 7,210 m³/h | 695 Pa | 1,400 rpm | 1,100 W | 82 dB(A) | 380 V | |
| LWBA6D450-138NT-07 | 4,017 m³/h | 309 Pa | 920 rpm | 300 W | 60 dB(A) | 380 V | View |
| LWBA6E450-138NS-05 | 4,017 m³/h | 309 Pa | 930 rpm | 260 W | 60 dB(A) | 230 V | View |
| LWBA4D450-138NT-08 | 4,450 m³/h | 381 Pa | 1,050 rpm | 360 W | 61 dB(A) | 380 V | View |
| LWBA6E450-138NS-06 | 4,450 m³/h | 381 Pa | 1,050 rpm | 350 W | 61 dB(A) | 230 V | View |
| LWBA4E450-138NS-02 | 6,077 m³/h | 618 Pa | 1,350 rpm | 800 W | 76 dB(A) | 230 V | View |
| LWBA4D450-138NT-01 | 6,077 m³/h | 618 Pa | 1,350 rpm | 800 W | 76 dB(A) | 380 V | View |
| LWBA4D450-138NT-09 | 6,164 m³/h | 630 Pa | 1,395 rpm | 616 W | 78.8 dB(A) | 380 V | View |
| LWBA4D450-188NT-03 | 6,695 m³/h | 618 Pa | 1,350 rpm | 800 W | 79 dB(A) | 380 V | View |
| LWFA8D450-188NT-02 | 7,416 m³/h | 370.8 Pa | 680 rpm | 2,000 W | 68 dB(A) | 380 V | View |
| LWFA6D450-188NT-01 | 7,725 m³/h | 638.6 Pa | 930 rpm | 3,500 W | 74 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
Other models in the LWBA4D450 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA4D400-138NT-10Ø400 mm · 4,120 m³/h · 494 Pa · ACadjacent size
LWBE3G500-188NT-10Ø500 mm · 13,472 m³/h · 1,541 Pa · ECadjacent size
LWBA4D400-138NT-08Ø400 mm · 4,532 m³/h · 494 Pa · ACadjacent size
LWBA4E400-138NS-09Ø400 mm · 4,120 m³/h · 494 Pa · ACadjacent size
LWBE3G500-188NT-08Ø500 mm · 14,214 m³/h · 886 Pa · ECadjacent size
LWBA4D400-138NT-11Ø400 mm · 5,082 m³/h · 504 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWAA8E630S-5MEB-06Ø630 mm · 7,210 m³/h · ACsimilar duty
LWAA6D550S-5MEB-08Ø550 mm · 7,210 m³/h · ACsimilar duty
LWAA6E550S-5MEB-06Ø550 mm · 7,210 m³/h · ACsimilar duty
LWAA8D630S-5MEB-07Ø630 mm · 7,210 m³/h · ACsimilar duty
LWBE3G450-138NT-12Ø450 mm · 7,182 m³/h · 730 Pa · ECsimilar duty
LWBE3G450-138PT-13Ø450 mm · 7,182 m³/h · 730 Pa · ECsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point