ImpellerØ280 mm11.0 in
Max airflow4,422 m³/h2,601 CFM
Max static pressure592 Pa2.38 in. wg
Voltage230 V
Speed820 rpm
Input power750 W1.01 hp
Noise74 dB(A)

LWFE3G280-138DS-02 EC Dual Inlet Forward Centrifugal Blower Ø280 mm

Ø280 mm | EC | Max airflow 4,422 m³/h | Max static pressure 592 Pa | 74 dB(A)

SKU: LWFE3G280-138DS-02 Categories: Centrifugal Fans, Dual Inlet Forward Curved Blowers, Impeller Ø180–355 mm

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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.

LWFE3G280-138DS-02 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFE3G280-138DS-02 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWFE3G280-138DS-02 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Downloads for LWFE3G280-138DS-02

DOCXDatasheet · 571 KB PDFDatasheet · 576 KB

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LWFE3G280-138DS-02 is a LONGWELL EC Dual Inlet Forward Centrifugal Blower from the Dual Inlet Forward Curved Blowers range, impeller Ø280 mm, rated 230 V EC, maximum airflow 4,422 m³/h, maximum static pressure 592 Pa, noise 74 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	LWFE3G280-138DS-02
Series	LWFE3G280
Motor type	EC
Phase	1-phase
Rated voltage	230 V
Frequency	50 Hz
Current	3.5 A
Input power	750 W
Speed	820 rpm
Max. airflow	4,422 m³/h
Max. airflow (CFM)	2,601 CFM
Max. static pressure	592 Pa
Noise	74 dB(A)
Ambient temperature	-25 ~ 60 °C
Storage temperature	-40 ~ 80℃
Humidity	30 ~ 95 % RH
Altitude	< 1000m
Impeller diameter	Ø280 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	40,000Hours(L10), At 40 °Croom, 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.

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-02 this model	4,422 m³/h	592 Pa	820 rpm	750 W	74 dB(A)	230 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
LWFE3G280-092PS-03	2,008.5 m³/h	803.4 Pa	2,650 rpm	225 W	70 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
LWFE3G280-072PS-01	2,317.5 m³/h	556.2 Pa	1,910 rpm	170 W	73 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
LWBE3G280-102PS-18	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
LWBE3G280-102PS-19	3,039 m³/h	1,102 Pa	3,000 rpm	625 W	82 dB(A)	230 V	View
LWFE3G280-102PS-07	3,193 m³/h	1,442 Pa	3,000 rpm	500 W	75 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
LWFE3G280-102PS-04	3,862.5 m³/h	1,658 Pa	3,270 rpm	700 W	85 dB(A)	230 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