AC Forward Curved Centrifugal Fan performance curve (shared by several models)

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

ImpellerØ400 mm15.7 in
Max airflow7,313 m³/h4,304 CFM
Max static pressure540.75 Pa2.17 in. wg
Voltage380 V
Speed870 rpm
Input power2,800 W3.75 hp
Noise74 dB(A)

LWFA6D400-188NT-02 AC Forward Curved Centrifugal Fan Ø400 mm

Ø400 mm | AC | Max airflow 7,313 m³/h | Max static pressure 540.75 Pa | 74 dB(A)

SKU: LWFA6D400-188NT-02 Categories: Centrifugal Fans, Forward Curved Centrifugal Fans, Impeller Ø225–500 mm

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

PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueAC AC Forward Centrifugal Fan · SKU on PDF p. 13

All files for LWFA6D400-188NT-025 files · direct download

PDFFull product catalogue · model on PDF p. 13 PNGDimensional drawing WEBPPerformance curve PDFSeries catalogue

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

Proven in projects

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

Get a quote · LWFA6D400-188NT-02

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFA6D400-188NT-02datasheet · 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 LWFA6D400-188NT-02

LWFA6D400-188NT-02 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFA6D400-188NT-02 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWFA6D400-188NT-02: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFA6D400-188NT-02

LWFA6D400-188NT-02 is a LONGWELL AC Forward Curved Centrifugal Fan from the Forward Curved Centrifugal Fans range, impeller Ø400 mm, rated 380 V AC, maximum airflow 7,313 m³/h, maximum static pressure 540.75 Pa, noise 74 dB(A), input power 2,800 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model	LWFA6D400-188NT-02
Series	LWFA6D400
Motor type	AC
Phase	3-phase
Rated voltage	380 V
Frequency	50 Hz
Current	4.8 A
Input power	2,800 W
Speed	870 rpm
Max. airflow	7,313 m³/h
Max. static pressure	540.75 Pa
Noise	74 dB(A)
Ambient temperature	-30 ~ 60 °C
Impeller diameter	Ø400 mm
Rotor diameter	188 mm
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1

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 LWFA6D400: 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 LWFA6D400-188NT-02

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 (Ø400 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
LWFA6D400-188NT-02 this model	7,313 m³/h	540.75 Pa	870 rpm	2,800 W	74 dB(A)	380 V
LWBA6E400-102NS-05	2,163 m³/h	216 Pa	940 rpm	135 W	56 dB(A)	230 V	View
LWBA6E400-102NS-06	2,421 m³/h	278 Pa	1,050 rpm	155 W	57 dB(A)	230 V	View
LWBA4D400-102NT-03	2,936 m³/h	464 Pa	1,380 rpm	265 W	64 dB(A)	380 V	View
LWBA4E400-102NS-01	2,936 m³/h	464 Pa	1,350 rpm	260 W	64 dB(A)	230 V	View
LWBA4D400-102NT-04	3,090 m³/h	515 Pa	1,460 rpm	320 W	68 dB(A)	380 V	View
LWBA4E400-102NS-02	3,090 m³/h	515 Pa	1,450 rpm	330 W	68 dB(A)	230 V	View
LWBA4D400-138NT-10	4,120 m³/h	494 Pa	1,380 rpm	440 W	66 dB(A)	380 V	View
LWBA4E400-138NS-09	4,120 m³/h	494 Pa	1,380 rpm	430 W	66 dB(A)	230 V	View
LWBA4D400-138NT-08	4,532 m³/h	494 Pa	1,370 rpm	550 W	69 dB(A)	380 V	View
LWBA4E400-138NS-07	4,532 m³/h	494 Pa	1,380 rpm	550 W	69 dB(A)	230 V	View
LWBA4D400-138NT-11	5,082 m³/h	504 Pa	1,400 rpm	484 W	72 dB(A)	380 V	View
LWFA8D400-188NT-03	5,974 m³/h	345.05 Pa	700 rpm	1,700 W	65 dB(A)	380 V	View
LWFA4D400-188NT-01	6,695 m³/h	1,030 Pa	1,400 rpm	4,800 W	82 dB(A)	380 V	View