Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.

ImpellerØ190 mm7.5 in
Max airflow638.6 m³/h376 CFM
Max static pressure453.2 Pa1.82 in. wg
Voltage115 V
Speed2,940 rpm
Input power64 W
Noise65 dB(A)

LWBE3G190-072NU-18 EC Backward Curved Centrifugal Fan Ø190 mm

Ø190 mm | EC | Max airflow 638.6 m³/h | Max static pressure 453.2 Pa | 65 dB(A)

SKU: LWBE3G190-072NU-18 Categories: Backward Curved Centrifugal Fans, Centrifugal Fans, Impeller Ø133–225 mm

Direct from LONGWELL
OEM / ODM
Samples in 1–3 days
Production 15–30 days
12-month warranty
CE · ETL · RoHS

PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueEC ( ) EC Backward centrifugal fans #2 · SKU on PDF p. 10

All files for LWBE3G190-072NU-184 files · direct download

PDFFull product catalogue · model on PDF p. 10 WEBPDimensional drawing WEBPPerformance curve

CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center

Cross-reference: same impeller size class as ebm-papst K3G190, ebm-papst R3G190 — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.

Used in

Air conditioning Air handling units FanGrid arrays FFU / EFU All industries →

Proven in projects

AHU & ventilation unit fans CRAH FanGrid retrofit Heat pump fan programme All case studies →

Engineering files (on request)

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

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

Get a quote · LWBE3G190-072NU-18

Price, curve check and lead time within 1 business day.

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWBE3G190-072NU-18datasheet · catalogue · drawings · curves — listed above

Samples 1–3 days · fee credited to your order
Typically 50–200 pcs · ~30 pcs for a first validation order
T/T 30 / 70 · FOB / CIF / DDP
Released to LONGWELL standards · 12-month warranty
How ordering works →

Performance curve (P-Q) LWBE3G190-072NU-18

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 (10 here, rated 115 V). Data version: catalogue 2026-08. 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.

Video LWBE3G190-072NU-18

LONGWELL 190mm EC Backward Curved Centrifugal Fan | LWBE3G190 · open in video library

Longwell EC Backward Curved Centrifugal Fans – Delivered Globally with Efficiency | LWBE3G190-072PS-03 · open in video library

Drawing & Curve LWBE3G190-072NU-18

LWBE3G190-072NU-18 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWBE3G190-072NU-18 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWBE3G190-072NU-18: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWBE3G190-072NU-18

LWBE3G190-072NU-18 is a LONGWELL EC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø190 mm, rated 115 V EC, maximum airflow 638.6 m³/h, maximum static pressure 453.2 Pa, noise 65 dB(A), input power 64 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	LWBE3G190-072NU-18
Series	LWBE3G190
Motor type	EC
Phase	1-phase
Rated voltage	115 V
Frequency	50 Hz
Current	1.1 A
Input power	64 W
Speed	2,940 rpm
Max. airflow	638.6 m³/h
Max. airflow (CFM)	376 CFM
Max. static pressure	453.2 Pa
Noise	65 dB(A)
Ambient temperature	-25 ~ 60 °C
Storage temperature	-40 ~ 80℃
Humidity	5 ~ 90 % RH
Altitude	< 1000m
Impeller diameter	Ø190 mm
Rotor diameter	72 mm
Impeller material	PA6+GF30% ( Impeller ) Bearing Maintenance-free deep groove ball bearings Weight APPROX 1.25 (Kg) LONGWELL NGWELL L L LONGWE Version number : A0 NINGBO LONGWELL ELECTRIC TECHNOLOGY CO.,LTD . Phone: 0086 574 6218 9863 FAX
Protection class	IP55
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1
Vibration standard	JB/T 8689
Service life	40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH. Balancing According to JB/T 9101-1999 requirements G6.3 Vibration of the fan Test method accord with JB/T 8689 Installation method Horizontal or vertical installation Mate
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 LWBE3G190: 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.

Product-line certificates

Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO management-system certificate and the certificates whose model list covers this model. Click a scan to open the original.

ISO 9001 / 14001 / 45001Management systems of Ningbo Longwell Electric Technology Co., Ltd. (company certificate).

ISO 9001 / 14001 / 45001 management system certificate — LONGWELL certificate

PDFISO 9001 / 14001 / 45001 management system certificate

CE-LVDVoluntary certificates of conformity issued by KTS; the covered models are listed on each certificate.

CE-LVD certificate of conformity KB2206066L01 · LWBE3G — LONGWELL certificate

PDFCE-LVD certificate of conformity KB2206066L01 · LWBE3G

ETLIntertek Authorization to Mark, control no. 5022563; the covered model ranges are stated on the document.

ETL Authorization to Mark · report 220400508HAN-001 · LWBE3G / LWDE3G / LWFE3G — LONGWELL certificate

PDFETL Authorization to Mark · report 220400508HAN-001 · LWBE3G / LWDE3G / LWFE3G

RoHSVoluntary certificate of conformity issued by KTS; the covered models are listed on the certificate.

RoHS certificate of conformity KB2206068R01 · LWBE3G — LONGWELL certificate

PDFRoHS certificate of conformity KB2206068R01 · LWBE3G

Need a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.

How to order LWBE3G190-072NU-18

Most first orders follow the same eight steps. Quantities, terms and lead times are confirmed in your quotation.

1SelectFind models by duty point in the selector or by model number, compare on the curve and add them to your RFQ list.
2Engineering checkWithin 1 business day you receive the duty-point check on the curve, price and lead time.
3SamplesStock models ship in 1–3 days.
4Validation supportDatasheets, drawings, wiring diagrams and DoC per model; test reports, CAD and register maps after a short project check or NDA.
5Order & paymentProforma invoice; first orders on T/T 30 / 70.
6Production & release15–30 days at the partner factory that builds your model, then inspected and released to LONGWELL standards with outgoing sampling to AQL 2.5.
7ShippingFOB / CIF / DDP by sea from Ningbo or Shanghai; express and air on EXW / FCA / DAP.
8After-sales12 months standard, extendable to 18–24 months by project agreement; test records retained for 5 years; 8D closed-loop for any issue; annual technical review for framework customers.

See terms, QC and FAQ →

Test & release at LONGWELL

Specified and drawn by LONGWELL; built to LONGWELL drawings by qualified partner factories; inspected and released to LONGWELL standards before shipment.

See test and release photos (8)

LONGWELL Semi-anechoic chamber — Semi-anechoic chamber

LONGWELL Test laboratory — Test laboratory

Test labs and all certificate scans →

Alternatives with the same impeller (Ø190 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
LWBE3G190-072NU-18 this model	638.6 m³/h	453.2 Pa	2,940 rpm	64 W	65 dB(A)	115 V
LWBE3G190-072NS-14	638.6 m³/h	453.2 Pa	2,940 rpm	64 W	65 dB(A)	230 V	View
LWBE3G190-072NS-13	813.7 m³/h	587.1 Pa	3,300 rpm	87 W	70 dB(A)	230 V	View
LWBE3G190-072PS-12	851 m³/h	798 Pa	4,230 rpm	104 W	70 dB(A)	230 V	View
LWBE3G190-072NS-16	851 m³/h	798 Pa	4,230 rpm	104 W	70 dB(A)	230 V	View
LWBE3G190-072NU-19	854.9 m³/h	875.5 Pa	3,800 rpm	115 W	71 dB(A)	115 V	View
LWBE3G190-072NS-15	854.9 m³/h	803.4 Pa	3,700 rpm	135 W	70 dB(A)	230 V	View
LWBE3G190-072NS-12	854.9 m³/h	875.5 Pa	3,800 rpm	115 W	71 dB(A)	230 V	View
LWBE3G190-072NS-06	973.35 m³/h	1,009.4 Pa	4,100 rpm	170 W	72 dB(A)	230 V	View
LWBE3G190-072NU-20	973.35 m³/h	1,009.4 Pa	4,100 rpm	170 W	72 dB(A)	115 V	View