ImpellerØ310 mm12.2 in
Max airflow5,592.9 m³/h3,292 CFM
Max static pressure1,082 Pa4.34 in. wg
Voltage400 V
Speed3,300 rpm
Input power1,588 W2.13 hp
Noise92 dB(A)

LWBE3G310-138NT-25 EC Backward Curved Centrifugal Fan Ø310 mm

Ø310 mm | EC | Max airflow 5,592.9 m³/h | Max static pressure 1,082 Pa | 92 dB(A)

SKU: LWBE3G310-138NT-25 Categories: Backward Curved Centrifugal Fans, Centrifugal Fans, Impeller Ø250–355 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.

LWBE3G310-138NT-25 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWBE3G310-138NT-25 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Downloads for LWBE3G310-138NT-25

DOCXDatasheet · 579 KB

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LWBE3G310-138NT-25 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø310 mm, rated 400 V EC, maximum airflow 5,592.9 m³/h, maximum static pressure 1,082 Pa, noise 92 dB(A), input power 1,588 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	LWBE3G310-138NT-25
Series	LWBE3G310
Motor type	EC
Phase	3-phase
Rated voltage	400 V
Frequency	50 Hz
Current	2.4 A
Input power	1,588 W
Speed	3,300 rpm
Max. airflow	5,592.9 m³/h
Max. airflow (CFM)	3,290 CFM
Max. static pressure	1,082 Pa
Noise	92 dB(A)
Ambient temperature	-25 ~ 60 °C
Altitude	< 1000m
Impeller diameter	Ø310 mm
Rotor diameter	138
Impeller material	Aluminum Alloy
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	Test method accord with JB/T 8689
Service life	40,000Hours(L10). At 40℃ 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 range 1.5±0.1VDC~9.5±0.2VDC(During normal operation, when the VSP voltage is below 0.9±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: 12Pulse/R; FG internal open circuit output, external pull-up resistor 10KΩ, pull-up voltage +10V
Auxiliary output	Output 10±0.3VDC, Max Current: 10mA
Communication	LWRS485-01
Protection functions	Over-temperature protection, Over-current protection, Locked-rotor protection
Soft start	Delay time <30 seconds to full speed
Rotation	Clockwise,seen on rotor

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 LWBE3G310: 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 (Ø310 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
LWBE3G310-138NT-25 this model	5,592.9 m³/h	1,082 Pa	3,300 rpm	1,588 W	92 dB(A)	400 V
LWBE3G310-092PS-11	2,235 m³/h	474 Pa	1,850 rpm	160 W	75 dB(A)	230 V	View
LWFE3G310-072PS-01	2,266 m³/h	700.4 Pa	1,810 rpm	175 W	66 dB(A)	230 V	View
LWBE3G310-092PS-12	2,410 m³/h	443 Pa	1,750 rpm	150 W	75 dB(A)	230 V	View
LWFE3G310-092PS-08	2,523.5 m³/h	669.5 Pa	2,050 rpm	220 W	66 dB(A)	230 V	View
LWFE3G310-092PS-07	2,678 m³/h	607.7 Pa	1,500 rpm	175 W	63 dB(A)	230 V	View
LWBE3G310-102PS-02	2,869 m³/h	630 Pa	2,150 rpm	285 W	70 dB(A)	230 V	View
LWBE3G310-102PS-16	2,884 m³/h	963 Pa	2,600 rpm	450 W	78 dB(A)	230 V	View
LWBE3G310-102NS-18	2,884 m³/h	963 Pa	2,600 rpm	450 W	78 dB(A)	230 V	View
LWBE3G310-102PS-15	2,936 m³/h	700 Pa	2,300 rpm	370 W	76 dB(A)	230 V	View
LWFE3G310-102PS-03	4,120 m³/h	1,081.5 Pa	2,960 rpm	700 W	85 dB(A)	230 V	View
LWBE3G310-138PT-04	4,398 m³/h	824 Pa	2,600 rpm	980 W	74 dB(A)	400 V	View
LWBE3G310-138NT-05	4,398.1 m³/h	824 Pa	2,600 rpm	980 W	74 dB(A)	400 V	View
LWFE3G310-102PT-09	5,150 m³/h	1,730.4 Pa	3,000 rpm	1,100 W	85 dB(A)	400 V	View
LWBE3G310-138PT-10	5,593 m³/h	1,082 Pa	3,300 rpm	1,588 W	92 dB(A)	400 V	View