ImpellerØ138 mm5.4 in
Max airflow8,985 m³/h5,288 CFM
Max static pressure840 Pa3.37 in. wg
Voltage400 V
Speed2,600 rpm
Input power2,400 W3.22 hp
Noise70 dB(A)

LWBE3G450-188NT-14 EC Backward Curved Centrifugal Fan Ø138 mm

Ø138 mm | EC | Max airflow 8,985 m³/h | Max static pressure 840 Pa | 70 dB(A)

SKU: LWBE3G450-188NT-14 Categories: Backward Curved Centrifugal Fans, Centrifugal Fans, Impeller Ø133–225 mm

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

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Engineering files (on request)

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

DWG2D drawing (DWG)203 KBRequest →

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 LWBE3G450-188NT-14drawings · 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.

LWBE3G450-188NT-14 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWBE3G450-188NT-14 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWBE3G450-188NT-14 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Downloads for LWBE3G450-188NT-14

DOCXDatasheet · 621 KB PDFDatasheet · 536 KB

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

LWBE3G450-188NT-14 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø138 mm, rated 400 V EC, maximum airflow 8,985 m³/h, maximum static pressure 840 Pa, noise 70 dB(A), input power 2,400 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	LWBE3G450-188NT-14
Series	LWBE3G450
Motor type	EC
Phase	3-phase
Rated voltage	400 V
Frequency	50 Hz
Current	5.2 A
Input power	2,400 W
Speed	2,600 rpm
Max. airflow	8,985 m³/h
Max. airflow (CFM)	5,285 CFM
Max. static pressure	840 Pa
Noise	70 dB(A)
Ambient temperature	-25 ~ 60 °C
Storage temperature	-25 ~ 70℃
Humidity	0 ~ 85% RH
Altitude	< 1000m
Impeller diameter	Ø138 mm
Rotor diameter	138
Impeller material	Aluminum Alloy (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℃room, humidity 15%~65%RH
Speed control	Control input 0~10VDC(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)
Speed feedback	Tach output: 15Pulse/R; FG internal open circuit output, external pull-up resistor R, pull-up voltage V+
Auxiliary output	Output 10±0.3VDC, Max Current: 22mA
Communication	LWRS485-04
Protection functions	Current limiting protection, Over-temperature protection, Over-current protectionLocked-rotor protection, Input power supply lacks phase protection
Soft start	Delay time <35 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 LWBE3G450: 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.