ImpellerØ250 mm9.8 in
Max airflow4,058 m³/h2,363 CFM
Max static pressure479 Pa1.92 in. wg
Voltage230 V
Speed960 rpm
Input power750 W1.01 hp
Noise75 dB(A)

LWFE3G250-138DS-02 EC Dual Inlet Forward Centrifugal Blower Ø250 mm

Ø250 mm | EC | Max airflow 4,058 m³/h | Max static pressure 479 Pa | 75 dB(A)

SKU: LWFE3G250-138DS-02 Categories: Centrifugal Fans, Dual Inlet Forward Curved Blowers, Impeller Ø180–355 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)3.3 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 LWFE3G250-138DS-02drawings · 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.

LWFE3G250-138DS-02 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFE3G250-138DS-02 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWFE3G250-138DS-02 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Downloads for LWFE3G250-138DS-02

PDFDatasheet

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

LWFE3G250-138DS-02 is a LONGWELL EC Dual Inlet Forward Centrifugal Blower from the Dual Inlet Forward Curved Blowers range, impeller Ø250 mm, rated 230 V EC, maximum airflow 4,058 m³/h, maximum static pressure 479 Pa, noise 75 dB(A), input power 750 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	LWFE3G250-138DS-02
Series	LWFE3G250
Motor type	EC
Phase	1-phase
Rated voltage	230 V
Frequency	50 Hz
Current	3.5 A
Input power	750 W
Speed	960 rpm
Max. airflow	4,058 m³/h
Max. airflow (CFM)	2,363 CFM
Max. static pressure	479 Pa
Noise	75 dB(A)
Ambient temperature	-25 ~ 60 °C
Storage temperature	-25 ~ 70℃
Humidity	0 ~ 85% RH
Altitude	< 1000m
Impeller diameter	Ø250 mm
Rotor diameter	138
Impeller material	Galvanised sheet steel (Impeller)
Protection class	IP54
Insulation class	F
Bearing	Maintenance-free deep groove ball bearings
Duty	S1
Balance grade	G6.3
Vibration standard	JB/T 8689
Service life	20,000Hours(L10). At 70℃room, 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 LWFE3G250: 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 (Ø250 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
LWFE3G250-138DS-02 this model	4,058 m³/h	479 Pa	960 rpm	750 W	75 dB(A)	230 V
LWBE3G250-072PS-15	1,215 m³/h	391 Pa	2,150 rpm	90 W	68 dB(A)	230 V	View
LWFE3G250-072PS-02	1,236 m³/h	515 Pa	2,180 rpm	115 W	62 dB(A)	230 V	View
LWBE3G250-092PS-21	1,421 m³/h	556 Pa	2,600 rpm	170 W	69 dB(A)	230 V	View
LWBE3G250-072PS-17	1,421 m³/h	639 Pa	2,760 rpm	140 W	77 dB(A)	230 V	View
LWFE3G250-072PS-04	1,478.05 m³/h	927 Pa	2,570 rpm	169 W	71 dB(A)	230 V	View
LWBE3G250-102PS-22	1,524 m³/h	773 Pa	3,150 rpm	240 W	78 dB(A)	230 V	View
LWBE3G250-092PS-16	1,531 m³/h	785 Pa	3,010 rpm	140 W	72.1 dB(A)	230 V	View
LWFE3G250-092PS-05	1,648 m³/h	721 Pa	2,700 rpm	230 W	71 dB(A)	230 V	View
LWBE3G250-102PS-24	1,700 m³/h	1,082 Pa	3,500 rpm	370 W	82 dB(A)	230 V	View
LWBE3G250-092PS-20	1,730 m³/h	525 Pa	2,500 rpm	145 W	74 dB(A)	230 V	View
LWBE3G250-102PS-23	1,751 m³/h	824 Pa	3,170 rpm	270 W	84 dB(A)	230 V	View
LWFE3G250-102PS-06	2,472 m³/h	1,545 Pa	3,650 rpm	520 W	85 dB(A)	230 V	View
LWFE3G250-102PS-07	3,038.5 m³/h	1,442 Pa	4,100 rpm	750 W	93 dB(A)	230 V	View
LWFE3G250-102PT-08	3,708 m³/h	1,751 Pa	3,860 rpm	1,000 W	92 dB(A)	400 V	View