Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ450 mm17.7 in
- Max airflow4,017 m³/h2,364 CFM
- Max static pressure309 Pa1.24 in. wg
- Voltage380 V
- Speed920 rpm
- Input power300 W
- Noise60 dB(A)
LWBA6D450-138NT-07 AC Backward Curved Centrifugal Fan Ø450 mm
Ø450 mm | AC | Max airflow 4,017 m³/h | Max static pressure 309 Pa | 60 dB(A)
- Direct from LONGWELL
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Performance curve (P-Q) LWBA6D450-138NT-07
Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (1 here, rated 380 V). Data version: catalogue curve re-digitised 2026-09-20 (axis-calibrated, cross-checked). 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.
Dimensional drawing LWBA6D450-138NT-07
Files for LWBA6D450-138NT-07: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.
Technical description LWBA6D450-138NT-07
LWBA6D450-138NT-07 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø450 mm, rated 380 V AC, maximum airflow 4,017 m³/h, maximum static pressure 309 Pa, noise 60 dB(A), input power 300 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWBA6D450-138NT-07 |
|---|---|
| Series | LWBA6D450 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 50 Hz |
| Current | 1 A |
| Input power | 300 W |
| Speed | 920 rpm |
| Max. airflow | 4,017 m³/h |
| Max. static pressure | 309 Pa |
| Noise | 60 dB(A) |
| Ambient temperature | -40 ~ 65 °C |
| Impeller diameter | Ø450 mm |
| Rotor diameter | 138 mm |
| Impeller material | Aluminum Alloy |
| Protection class | IP54 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| 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 LWBA6D450: 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.
Company certificates
Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO 9001 / 14001 / 45001 management-system certificate. Click a scan to open the original.
ISO 9001 / 14001 / 45001Management systems of Ningbo Longwell Electric Technology Co., Ltd. (company certificate).
PDFISO 9001 / 14001 / 45001 management system certificateNeed a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.
How to order LWBA6D450-138NT-07
Most first orders follow the same eight steps. Quantities, terms and lead times are confirmed in your quotation.
- 1SelectFind models by duty point in the selector or by model number, compare on the curve and add them to your RFQ list.
- 2Engineering checkWithin 1 business day you receive the duty-point check on the curve, price and lead time.
- 3SamplesStock models ship in 1–3 days.
- 4Validation supportDatasheets, drawings, wiring diagrams and DoC per model; test reports, CAD and register maps after a short project check or NDA.
- 5Order & paymentProforma invoice; first orders on T/T 30 / 70.
- 6Production & release15–30 days at the partner factory that builds your model, then inspected and released to LONGWELL standards with outgoing sampling to AQL 2.5.
- 7ShippingFOB / CIF / DDP by sea from Ningbo or Shanghai; express and air on EXW / FCA / DAP.
- 8After-sales12 months standard, extendable to 18–24 months by project agreement; test records retained for 5 years; 8D closed-loop for any issue; annual technical review for framework customers.
Test & release at LONGWELL
Specified and drawn by LONGWELL; built to LONGWELL drawings by qualified partner factories; inspected and released to LONGWELL standards before shipment.
See test and release photos (8)
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 | |
|---|---|---|---|---|---|---|---|
| LWBA6D450-138NT-07 this model | 4,017 m³/h | 309 Pa | 920 rpm | 300 W | 60 dB(A) | 380 V | |
| 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 |
| LWBA4D450-188NT-04 | 7,210 m³/h | 695 Pa | 1,400 rpm | 1,100 W | 82 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.
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA6E400-102NS-06Ø400 mm · 2,421 m³/h · 278 Pa · ACadjacent size
LWBA4D400-102NT-04Ø400 mm · 3,090 m³/h · 515 Pa · ACadjacent size
LWBA6E400-102NS-05Ø400 mm · 2,163 m³/h · 216 Pa · ACadjacent size
LWBA4D400-102NT-03Ø400 mm · 2,936 m³/h · 464 Pa · ACadjacent size
LWBA4E400-138NS-07Ø400 mm · 4,532 m³/h · 494 Pa · ACadjacent size
LWBA4D400-138NT-08Ø400 mm · 4,532 m³/h · 494 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBA4D355-138NT-12Ø355 mm · 4,017 m³/h · 618 Pa · ACsimilar duty
LWBA4E355-138NS-14Ø355 mm · 4,017 m³/h · 618 Pa · ACsimilar duty
LWBA6E450-138NS-05Ø450 mm · 4,017 m³/h · 309 Pa · ACsimilar duty
LWDE-400 (16")U-MWN-03Ø400 mm · 4,032 m³/h · ECsimilar duty
LWDE-400 (16")U-MWN-01Ø400 mm · 4,032 m³/h · ECsimilar duty
LWCA-1501200SN-06Ø150 mm · 4,000 m³/h · 135 Pa · ACsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point
Go deeper on longwellfans.com
Application guides, project stories and engineering calculators for centrifugal fans — on our main site.
Solutions
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