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 airflow597 m³/h351 CFM
Max static pressure979 Pa3.93 in. wg
Voltage230 V
Speed2,030 rpm
Input power110 W
Noise65 dB(A)

LWFE3G140-072SS-03 EC Single Inlet Forward Centrifugal Blower Ø140 mm

Ø140 mm | EC | Max airflow 597 m³/h | Max static pressure 979 Pa | 65 dB(A)

SKU: LWFE3G140-072SS-03 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 catalogueEC EC Single Inlet Forward Centrifugal Blower · SKU on PDF p. 8

All files for LWFE3G140-072SS-034 files · direct download

PDFFull product catalogue · model on PDF p. 8 WEBPDimensional drawing 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 · LWFE3G140-072SS-03

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFE3G140-072SS-03datasheet · 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) LWFE3G140-072SS-03

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 230 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.

Video LWFE3G140-072SS-03

LWFE3G140 Series EC Forward Curved Centrifugal Fan: Single Inlet, Precise Airflow · open in video library

LONGWELL LWFE3G140 | LWFE3G140-072NU-04 · open in video library

Drawing & Curve LWFE3G140-072SS-03

LWFE3G140-072SS-03 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFE3G140-072SS-03 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWFE3G140-072SS-03: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFE3G140-072SS-03

LWFE3G140-072SS-03 is a LONGWELL EC Single Inlet Forward Centrifugal Blower from the Single Inlet Forward Curved Blowers range, impeller Ø140 mm, rated 230 V EC, maximum airflow 597 m³/h, maximum static pressure 979 Pa, noise 65 dB(A), input power 110 W. The EC motor integrates the drive electronics: stepless speed control by 0–10 V or PWM signal, speed feedback and high efficiency at part load.

Technical data

Model	LWFE3G140-072SS-03
Series	LWFE3G140
Motor type	EC
Phase	1-phase
Rated voltage	230 V
Frequency	50 Hz
Current	0.8 A
Input power	110 W
Speed	2,030 rpm
Max. airflow	597 m³/h
Max. static pressure	979 Pa
Noise	65 dB(A)
Ambient temperature	-30 ~ 60 °C
Impeller diameter	Ø140 mm
Rotor diameter	72 mm
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 LWFE3G140: 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 220400508HAN-001 · LWBE3G / LWDE3G / LWFE3G — LONGWELL certificate

PDFETL Authorization to Mark · report 220400508HAN-001 · LWBE3G / LWDE3G / LWFE3G

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

How to order LWFE3G140-072SS-03

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 · EC)

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
LWFE3G140-072SS-03 this model	597 m³/h	979 Pa	2,030 rpm	110 W	65 dB(A)	230 V
LWFE3G140-072SS-01	453 m³/h	783 Pa	1,860 rpm	85 W	72 dB(A)	230 V	View
LWFE3G140-072NS-01	484 m³/h	216 Pa	1,910 rpm	70 W	72 dB(A)	230 V	View
LWFE3G140-072NS-02	494 m³/h	845 Pa	2,060 rpm	115 W	74 dB(A)	230 V	View
LWFE3G140-072SS-02	505 m³/h	881 Pa	1,900 rpm	85 W	61 dB(A)	230 V	View
LWFE3G140-072SS-04	597 m³/h	979 Pa	2,130 rpm	110 W	65 dB(A)	230 V	View