Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ190 mm7.5 in
- Max airflow731 m³/h430 CFM
- Max static pressure453 Pa1.82 in. wg
- Voltage48 V
- Speed3,100 rpm
- Input power75 W
- Noise70 dB(A)
LWBD3G190-072NH-05 DC Backward Curved Centrifugal Fan Ø190 mm
Ø190 mm | DC | Max airflow 731 m³/h | Max static pressure 453 Pa | 70 dB(A)
- Direct from LONGWELL
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · ETL · RoHS
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) LWBD3G190-072NH-05
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 48 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.
Drawing, Curve & Wiring LWBD3G190-072NH-05
Files for LWBD3G190-072NH-05: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.
Technical description LWBD3G190-072NH-05
LWBD3G190-072NH-05 is a LONGWELL DC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø190 mm, rated 48 V DC, maximum airflow 731 m³/h, maximum static pressure 453 Pa, noise 70 dB(A), input power 75 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.
Technical data
| Model | LWBD3G190-072NH-05 |
|---|---|
| Series | LWBD3G190 |
| Motor type | DC |
| Rated voltage | 48 V |
| Current | 1.6 A |
| Input power | 75 W |
| Speed | 3,100 rpm |
| Max. airflow | 731 m³/h |
| Max. static pressure | 453 Pa |
| Noise | 70 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -40 ~ 72℃ |
| Humidity | 5 ~ 90 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø190 mm |
| Rotor diameter | 72 mm |
| Impeller material | PA6+GF ( Impeller ) Bearing Maintenance-free deep groove ball bearings Weight / (Kg) LONGWELL ELL LON Version number : A0 NINGBO LONGWELL ELECTRIC TECHNOLOGY CO.,LTD . Phone: 0086 574 6218 9863 FAX : 0086 574 6218 9863 ww |
| Protection class | IP42 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10), At 25 °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 LWBD3G190: 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.
Product-line certificates
Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO management-system certificate and the certificates whose model list covers this model. 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 certificateCE-LVD / CE-EMCVoluntary certificates of conformity issued by KTS; the covered models are listed on each certificate.
PDFCE-LVD certificate of conformity KB230605L01 · LWBD3G
PDFCE-EMC certificate of conformity KB230605E01 · LWBD3GETLIntertek Authorization to Mark, control no. 5022563; the covered model ranges are stated on the document.
PDFETL Authorization to Mark · report 230100446HAN-001 · LWAD3G / LWBD3G / LWFD3G / LWDD3GNeed a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.
How to order LWBD3G190-072NH-05
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 (Ø190 mm · DC)
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 | |
|---|---|---|---|---|---|---|---|
| LWBD3G190-072NH-05 this model | 731 m³/h | 453 Pa | 3,100 rpm | 75 W | 70 dB(A) | 48 V | |
| LWBD3G190-092NH-07 | 505 m³/h | 412 Pa | 3,300 rpm | 85 W | 73 dB(A) | 48 V | View |
| LWBD3G190-092NM-06 | 505 m³/h | 412 Pa | 3,300 rpm | 85 W | 73 dB(A) | 24 V | View |
| LWBD3G190-072NM-04 | 731 m³/h | 453 Pa | 3,100 rpm | 75 W | 70 dB(A) | 24 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 LWBD3G190 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWFD3G197-072DZ-01Ø197 mm · 1,197 m³/h · 525 Pa · DCadjacent size
LWFA4D200-102NT-01Ø200 mm · 1,236 m³/h · 226.6 Pa · ACadjacent size
LWBA2E180-092NS-02Ø180 mm · 494 m³/h · 371 Pa · ACadjacent size
LWFA4E180-092NS-01Ø180 mm · 773 m³/h · 195.7 Pa · ACadjacent size
LWBA2E180-092NS-03Ø180 mm · 443 m³/h · 335 Pa · ACadjacent size
LWFA4E200-102NS-02Ø200 mm · 1,236 m³/h · 226.6 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWDA-200(8")S-PWN-10Ø200 mm · 735 m³/h · 303 Pa · ACsimilar duty
LWFA2E133-092DS-08Ø133 mm · 726.15 m³/h · 381.1 Pa · ACsimilar duty
LWFA2E146-092DS-10Ø146 mm · 736 m³/h · 515 Pa · ACsimilar duty
LWCD-65620MN-07Ø65 mm · 722 m³/h · 53 Pa · DCsimilar duty
LWCD-65620LN-06Ø65 mm · 722 m³/h · 53 Pa · DCsimilar 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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