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

ImpellerØ250 mm9.8 in
Max airflow1,133 m³/h667 CFM
Voltage220/230 V
Speed1,650 rpm
Input power60 W
Noise54 dB(A)

LWAA4E250B-7MKB-19 AC Axial Fan Ø250 mm

Ø250 mm | AC | Max airflow 1,133 m³/h | 54 dB(A)

SKU: LWAA4E250B-7MKB-19 Categories: AC Axial Fans, Axial Fans, Impeller Ø145–250 mm

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

PDFRequest datasheetsent by an engineer within 1 business day

All files for LWAA4E250B-7MKB-192 files · direct download

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

Used in

Heat exchangers & condensers Refrigeration Condensing units Refrigeration condensers All industries →

Proven in projects

Heat pump fan programme Telecom & power cabinet cooling Cold chain supermarket retrofit Dry-type transformer cooling All case studies →

Get a quote · LWAA4E250B-7MKB-19

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWAA4E250B-7MKB-19datasheet · 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 →

Drawing & Curve LWAA4E250B-7MKB-19

LWAA4E250B-7MKB-19 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWAA4E250B-7MKB-19 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWAA4E250B-7MKB-19: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWAA4E250B-7MKB-19

LWAA4E250B-7MKB-19 is a LONGWELL AC Axial Fan from the AC Axial Fans range, impeller Ø250 mm, rated 220/230 V AC, maximum airflow 1,133 m³/h, noise 54 dB(A), input power 60 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model	LWAA4E250B-7MKB-19
Series	LWAA4E250
Motor type	AC
Phase	1-phase
Rated voltage	220/230 V
Frequency	60 Hz
Current	0.27 A
Input power	60 W
Speed	1,650 rpm
Max. airflow	1,133 m³/h
Noise	54 dB(A)
Ambient temperature	-30 ~ 60 °C
Impeller diameter	Ø250 mm
Impeller material	Cold rolled steel
Protection class	IP44
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1

Typical applications

Condensers, evaporators and dry coolers
Heat-pump and chiller outdoor units
Building and workshop ventilation
Cooling towers and transformer cooling

Series LWAA4E250: 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.

Company certificates

Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO 9001 / 14001 / 45001 management-system certificate. 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

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

How to order LWAA4E250B-7MKB-19

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 (Ø250 mm · AC)

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
LWAA4E250B-7MKB-19 this model	1,133 m³/h	see curve	1,650 rpm	60 W	54 dB(A)	220/230 V
LWA-250(10")U(S)M-01	28 m³/h	see curve	1,350 rpm	80 W	—	110-120 V	View
LWA-250(10")U(S)M-02	48 m³/h	see curve	2,800 rpm	230 W	—	110-120 V	View
LWAA4E250B-7MKB-18	979 m³/h	see curve	1,400 rpm	50 W	53 dB(A)	220/230 V	View
LWAA4E250S-7MKW-13	979 m³/h	see curve	1,400 rpm	50 W	53 dB(A)	220/230 V	View
LWAA4E250S-7MEB-05	979 m³/h	see curve	1,400 rpm	110 W	53 dB(A)	220/230 V	View
LWAA4D250S-7MEB-07	979 m³/h	see curve	1,400 rpm	100 W	53 dB(A)	380 V	View
LWAA4E250B-5MEW-23	989 m³/h	see curve	1,450 rpm	58 W	55 dB(A)	220 V	View
LWAA4E250S-7MKW-14	1,133 m³/h	see curve	1,620 rpm	55 W	54 dB(A)	220/230 V	View
LWAA4E250S-7MEB-06	1,133 m³/h	see curve	1,650 rpm	110 W	54 dB(A)	220/230 V	View
LWAA4D250S-7MEB-08	1,133 m³/h	see curve	1,650 rpm	100 W	54 dB(A)	380 V	View
LWAA2E250S-5MEW-22	1,627 m³/h	see curve	2,550 rpm	100 W	—	220 V	View
LWAA2E250S-7MEB-15	2,060 m³/h	see curve	2,700 rpm	130 W	67 dB(A)	220/230 V	View
LWA-250(10")U(S)M-03	2,100 m³/h	215 Pa	2,800 rpm	250 W	—	110-120 V	View
LWAA2E250S-7MEB-16	2,318 m³/h	see curve	2,900 rpm	170 W	69 dB(A)	220/230 V	View