LWFD3 series dimensional drawing (shared by several models)

LWFD3 series performance curve (shared by several models)

Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.

ImpellerØ140 mm5.5 in
Max airflow464 m³/h273 CFM
Max static pressure453 Pa1.82 in. wg
Voltage24 V
Speed1,800 rpm
Input power80 W
Noise65 dB(A)

LWFD3G140-072SM-02 DC Single Inlet Forward Centrifugal Blower Ø140 mm

Ø140 mm | DC | Max airflow 464 m³/h | Max static pressure 453 Pa | 65 dB(A)

SKU: LWFD3G140-072SM-02 Categories: Centrifugal Fans, Impeller Ø140–153 mm, Single Inlet Forward Curved Blowers

Direct from LONGWELL
OEM / ODM
Samples in 1–3 days
Production 15–30 days
12-month warranty
CE · ETL · RoHS

PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueDC DC Single Inlet Forward Centrifugal Blower · SKU on PDF p. 8

All files for LWFD3G140-072SM-024 files · direct download

PDFFull product catalogue · model on PDF p. 8 WEBPDimensional drawing (series)WEBPPerformance curve

CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center

Used in

Solid-fuel heating Commercial dishwashers Commercial dryers Fan burners All industries →

Proven in projects

AHU & ventilation unit fans CRAH FanGrid retrofit Heat pump fan programme All case studies →

Get a quote · LWFD3G140-072SM-02

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFD3G140-072SM-02datasheet · catalogue · drawings · curves — listed above

Samples 1–3 days · fee credited to your order
Typically 50–200 pcs · ~30 pcs for a first validation order
T/T 30 / 70 · FOB / CIF / DDP
Released to LONGWELL standards · 12-month warranty
How ordering works →

Performance curve (P-Q) LWFD3G140-072SM-02

Required airflow Required static pressure

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 24 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 LWFD3G140-072SM-02

LWFD3G140-072SM-02 Dimensional drawing (series) — **Dimensional drawing (series)**Series drawing from the catalogue; dimensions in mm apply to the size of this model as listed in the table.

LWFD3G140-072SM-02 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWFD3G140-072SM-02: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFD3G140-072SM-02

LWFD3G140-072SM-02 is a LONGWELL DC Single Inlet Forward Centrifugal Blower from the Single Inlet Forward Curved Blowers range, impeller Ø140 mm, rated 24 V DC, maximum airflow 464 m³/h, maximum static pressure 453 Pa, noise 65 dB(A), input power 80 W. The low-voltage brushless DC motor suits battery-powered equipment and electronics cooling with speed control on demand.

Technical data

Model	LWFD3G140-072SM-02
Series	LWFD3G140
Motor type	DC
Rated voltage	24 V
Current	3.3 A
Input power	80 W
Speed	1,800 rpm
Max. airflow	464 m³/h
Max. static pressure	453 Pa
Noise	65 dB(A)
Ambient temperature	-30 ~ 60 °C
Impeller diameter	Ø140 mm
Rotor diameter	72 mm
Impeller material	Plastic PA66
Insulation class	B
Bearing	Maintenance-free ball bearings
Duty	S1

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 LWFD3G140: 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).

ISO 9001 / 14001 / 45001 management system certificate — LONGWELL certificate

PDFISO 9001 / 14001 / 45001 management system certificate

ETLIntertek Authorization to Mark, control no. 5022563; the covered model ranges are stated on the document.

ETL Authorization to Mark · report 230100446HAN-001 · LWAD3G / LWBD3G / LWFD3G / LWDD3G — LONGWELL certificate

PDFETL Authorization to Mark · report 230100446HAN-001 · LWAD3G / LWBD3G / LWFD3G / LWDD3G

Need a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.

How to order LWFD3G140-072SM-02

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.

See terms, QC and FAQ →

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)

LONGWELL Semi-anechoic chamber — Semi-anechoic chamber

LONGWELL Test laboratory — Test laboratory

Test labs and all certificate scans →

Alternatives with the same impeller (Ø140 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
LWFD3G140-072SM-02 this model	464 m³/h	453 Pa	1,800 rpm	80 W	65 dB(A)	24 V
LWFD3G140-072SZ-01	464 m³/h	453 Pa	1,800 rpm	80 W	71 dB(A)	310 V	View
LWFD3G140-072SZ-02	464 m³/h	453 Pa	1,800 rpm	80 W	71 dB(A)	310 V	View
LWFD3G140-072SH-02	464 m³/h	453 Pa	1,800 rpm	80 W	65 dB(A)	48 V	View
LWFD3G140-072SH-01	464 m³/h	453 Pa	1,800 rpm	80 W	65 dB(A)	48 V	View
LWFD3G140-072SM-01	464 m³/h	453 Pa	1,800 rpm	80 W	65 dB(A)	24 V	View