ImpellerØ146 mm5.7 in
Max airflow752 m³/h442 CFM
Max static pressure567 Pa2.28 in. wg
Voltage230 V
Speed2,400 rpm
Input power115 W
Noise66 dB(A)

LWFE3G146-072DS-04 EC Dual Inlet Forward Centrifugal Blower Ø146 mm

Ø146 mm | EC | Max airflow 752 m³/h | Max static pressure 567 Pa | 66 dB(A)

SKU: LWFE3G146-072DS-04 Categories: Centrifugal Fans, Dual Inlet Forward Curved Blowers, Impeller Ø120–146 mm

Factory direct
OEM / ODM
Samples in 1–3 days
Production 15–30 days
18-month warranty
CE · ETL · RoHS

Engineering files (on request)

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

STP3D model (STEP)17.8 MBRequest →

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

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Datasheet (PDF)electrical & performance data All files for LWFE3G146-072DS-04drawings · curves · datasheet

Samples 1–3 days · fee credited to your order
From ~30 pcs for a first validation order
T/T 30 / 70 · FOB / CIF / DDP
100% tested · 18-month warranty
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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. 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.

LWFE3G146-072DS-04 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFE3G146-072DS-04 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWFE3G146-072DS-04 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Downloads for LWFE3G146-072DS-04

PDFDatasheet PDFDrawing · 672 KB

Need a non-standard size or another format? Ask an engineer or search the download center.

LWFE3G146-072DS-04 is a LONGWELL EC Dual Inlet Forward Centrifugal Blower from the Dual Inlet Forward Curved Blowers range, impeller Ø146 mm, rated 230 V EC, maximum airflow 752 m³/h, maximum static pressure 567 Pa, noise 66 dB(A), input power 115 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	LWFE3G146-072DS-04
Series	LWFE3G146
Motor type	EC
Phase	1-phase
Rated voltage	230 V
Frequency	50 Hz
Current	0.85 A
Input power	115 W
Speed	2,400 rpm
Max. airflow	752 m³/h
Max. airflow (CFM)	442 CFM
Max. static pressure	567 Pa
Noise	66 dB(A)
Ambient temperature	-25 ~ 60 °C
Storage temperature	-25 ~ 70℃
Humidity	0 ~ 85 % RH
Altitude	< 1000m
Impeller diameter	Ø146 mm
Rotor diameter	72
Impeller material	Plastic ( Impeller )
Protection class	IP55
Insulation class	B
Bearing	Maintenance-free deep groove ball bearings
Duty	S1
Balance grade	G6.3
Vibration standard	JB/T 8689
Service life	40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH

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 LWFE3G146: 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.

Alternatives with the same impeller (Ø146 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
LWFE3G146-072DS-04 this model	752 m³/h	567 Pa	2,400 rpm	115 W	66 dB(A)	230 V
LWFE3G146-092DS-02	855 m³/h	536 Pa	1,300 rpm	80 W	59 dB(A)	230 V	View
LWFE3G146-072DS-01	989 m³/h	474 Pa	1,350 rpm	120 W	72 dB(A)	230 V	View
LWFE3G146-092DS-03	1,009 m³/h	670 Pa	1,450 rpm	115 W	61 dB(A)	230 V	View
LWFE3G146-092DS-05	1,133 m³/h	876 Pa	3,200 rpm	220 W	74 dB(A)	230 V	View