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

ImpellerØ280 mm11.0 in
Max airflow4,223 m³/h2,484 CFM
Max static pressure917 Pa3.68 in. wg
Voltage380 V
Speed800 rpm
Input power600 W
Noise72 dB(A)

LWFE3G280-138DS-01 EC Dual Inlet Forward Centrifugal Blower Ø280 mm

Ø280 mm | EC | Max airflow 4,223 m³/h | Max static pressure 917 Pa | 72 dB(A)

SKU: LWFE3G280-138DS-01 Categories: Centrifugal Fans, Dual Inlet Forward Curved Blowers, Impeller Ø180–355 mm

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 Dual Inlet Forward Centrifugal Blower · SKU on PDF p. 14

All files for LWFE3G280-138DS-016 files · direct download

PDFFull product catalogue · model on PDF p. 14 WEBPDimensional drawing PNGPerformance curve WEBPWiring diagram DOCXDatasheet

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

Range hoods Air heaters Fan coil units Appliances All industries →

Proven in projects

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

Engineering files (on request)

CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.

EXB2D drawing (CAXA EXB)18.6 MBRequest →

CAD models contain the blade geometry and are not publicly downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.

Get a quote · LWFE3G280-138DS-01

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFE3G280-138DS-01datasheet · 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) LWFE3G280-138DS-01

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 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.

Drawing, Curve & Wiring LWFE3G280-138DS-01

LWFE3G280-138DS-01 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFE3G280-138DS-01 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWFE3G280-138DS-01 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Files for LWFE3G280-138DS-01: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFE3G280-138DS-01

LWFE3G280-138DS-01 is a LONGWELL EC Dual Inlet Forward Centrifugal Blower from the Dual Inlet Forward Curved Blowers range, impeller Ø280 mm, rated 380 V EC, maximum airflow 4,223 m³/h, maximum static pressure 917 Pa, noise 72 dB(A), input power 600 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	LWFE3G280-138DS-01
Series	LWFE3G280
Motor type	EC
Phase	3-phase
Rated voltage	380 V
Frequency	50 Hz
Current	1.1 A
Input power	600 W
Speed	800 rpm
Max. airflow	4,223 m³/h
Max. airflow (CFM)	2,484 CFM
Max. static pressure	917 Pa
Noise	72 dB(A)
Ambient temperature	-25 ~ 60 °C
Altitude	< 1000m
Impeller diameter	Ø280 mm
Rotor diameter	138 mm
Impeller material	Galvanised sheet steel( Impeller )
Protection class	IP54
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1
Balance grade	According to JB/T 9101-1999 requirements G6.3
Vibration standard	JB/T 8689
Service life	40,000Hours(L10), At 40 °C room, humidity 15%~65%RH.
Speed control	Control input 0~10VDC / PWM/(RS485 external control box can be connected)
Control signal	Control signal VSP voltage range1±0.1VDC~9.5±0.2VDC(During normal operation, when the VSP voltage is below 1.0±0.1VDC, the motor switches from operating mode to standby mode)
PWM input	PWM signal: frequency 1K–10KHz, amplitude 10–12V,duty cycle 30%–70% .
Speed feedback	Tach output: 12 Pulse/R; FG internal open circuit output, external pull-up resistor 10KΩ, pull-up voltage +10V
Auxiliary output	Output 10VDC, Max Current 10 mA
Protection functions	Over-temperature protection, Over-current protection, Locked-rotor protection’
Soft start	Delay time <30 seconds to full speed

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 LWFE3G280: 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 LWFE3G280-138DS-01

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 (Ø280 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
LWFE3G280-138DS-01 this model	4,223 m³/h	917 Pa	800 rpm	600 W	72 dB(A)	380 V
LWBE3G280-092PS-14	1,743 m³/h	481 Pa	2,200 rpm	105 W	69 dB(A)	230 V	View
LWBE3G280-092PS-15	1,813 m³/h	680 Pa	2,600 rpm	165 W	74 dB(A)	230 V	View
LWBE3G280-092PS-13	2,019 m³/h	546 Pa	2,200 rpm	180 W	72 dB(A)	230 V	View
LWBE3G280-102PS-16	2,318 m³/h	824 Pa	2,760 rpm	340 W	78 dB(A)	230 V	View
LWBE3G280-102NS-14	2,318 m³/h	824 Pa	2,760 rpm	340 W	78 dB(A)	230 V	View
LWBE3G280-102PS-18	2,472 m³/h	1,051 Pa	3,100 rpm	475 W	82 dB(A)	230 V	View
LWBE3G280-102NS-15	2,472 m³/h	1,051 Pa	3,100 rpm	475 W	82 dB(A)	230 V	View
LWBE3G280-138PT-05	3,028 m³/h	886 Pa	3,000 rpm	860 W	85 dB(A)	400 V	View
LWBE3G280-138NT-03	3,028 m³/h	886 Pa	3,000 rpm	860 W	85 dB(A)	400 V	View
LWBE3G280-102PS-19	3,039 m³/h	1,102 Pa	3,000 rpm	625 W	82 dB(A)	230 V	View
LWBE3G280-102NS-19	3,039 m³/h	1,102 Pa	3,000 rpm	625 W	82 dB(A)	230 V	View
LWBE3G280-138PT-06	3,790 m³/h	1,421 Pa	3,500 rpm	1,355 W	89 dB(A)	400 V	View
LWBE3G280-138NT-18	3,790 m³/h	1,421 Pa	3,500 rpm	1,355 W	89 dB(A)	400 V	View
LWFE3G280-102PT-08	4,377.5 m³/h	1,751 Pa	3,370 rpm	1,100 W	78 dB(A)	400 V	View