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

ImpellerØ315 mm12.4 in
Max airflow2,318 m³/h1,364 CFM
Max static pressure371 Pa1.49 in. wg
Voltage230 V
Speed1,450 rpm
Input power220 W
Noise64 dB(A)

LWBA4E315-138NS-13 AC Backward Curved Centrifugal Fan Ø315 mm

Ø315 mm | AC | Max airflow 2,318 m³/h | Max static pressure 371 Pa | 64 dB(A)

SKU: LWBA4E315-138NS-13 Categories: Backward Curved Centrifugal Fans, Centrifugal Fans, Impeller Ø250–355 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 Backward centrifugal fans · SKU on PDF p. 26

All files for LWBA4E315-138NS-135 files · direct download

PDFFull product catalogue · model on PDF p. 26 WEBPDimensional drawing WEBPPerformance curve WEBPWiring diagram

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

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.

EXB2D drawing (CAXA EXB)13.1 MBRequest →

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 · LWBA4E315-138NS-13

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWBA4E315-138NS-13datasheet · 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) LWBA4E315-138NS-13

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 (1 here, rated 230 V). Data version: catalogue curve re-digitised 2026-09-20 (axis-calibrated, cross-checked). 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.

Drawing, Curve & Wiring LWBA4E315-138NS-13

LWBA4E315-138NS-13 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWBA4E315-138NS-13 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWBA4E315-138NS-13 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Files for LWBA4E315-138NS-13: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWBA4E315-138NS-13

LWBA4E315-138NS-13 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø315 mm, rated 230 V AC, maximum airflow 2,318 m³/h, maximum static pressure 371 Pa, noise 64 dB(A), input power 220 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model	LWBA4E315-138NS-13
Series	LWBA4E315
Motor type	AC
Phase	1-phase
Rated voltage	230 V
Frequency	50 Hz
Current	1.2 A
Input power	220 W
Speed	1,450 rpm
Max. airflow	2,318 m³/h
Max. static pressure	371 Pa
Noise	64 dB(A)
Ambient temperature	-40 ~ 60 °C
Storage temperature	-40 ~ 80℃
Humidity	0 ~ 85 % RH
Altitude	< 1000m
Impeller diameter	Ø315 mm
Rotor diameter	138 mm
Impeller material	Aluminum Alloy( Impeller )
Protection class	IP54
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1
Balance grade	G6.3
Vibration standard	JB/T 8689
Service life	30,000Hours(L10), At 40 °Croom, humidity 15%~65%RH
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 LWBA4E315: 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 LWBA4E315-138NS-13

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 (Ø315 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
LWBA4E315-138NS-13 this model	2,318 m³/h	371 Pa	1,450 rpm	220 W	64 dB(A)	230 V
LWBA4E315-102NS-19	1,859 m³/h	294 Pa	1,390 rpm	116 W	67.4 dB(A)	230 V	View
LWBA4E315-102NS-11	1,957 m³/h	319 Pa	1,350 rpm	115 W	63 dB(A)	230 V	View
LWBA4D315-102NT-09	1,957 m³/h	309 Pa	1,400 rpm	136 W	63 dB(A)	380 V	View
LWBA4E315-102NS-18	2,079 m³/h	399 Pa	1,550 rpm	153 W	69.6 dB(A)	230 V	View
LWBA4D315-102NT-10	2,163 m³/h	412 Pa	1,560 rpm	175 W	65 dB(A)	380 V	View
LWBA4D315-138NT-15	2,318 m³/h	371 Pa	1,450 rpm	220 W	64 dB(A)	380 V	View
LWBA4D315-138NT-16	2,781 m³/h	515 Pa	1,650 rpm	300 W	68 dB(A)	380 V	View
LWBA4E315-138NS-14	2,781 m³/h	515 Pa	1,650 rpm	300 W	68 dB(A)	230 V	View
LWFA6D315-138NT-03	2,987 m³/h	249.26 Pa	940 rpm	780 W	68 dB(A)	380 V	View
LWFA6E315-138NS-04	3,605 m³/h	249.26 Pa	870 rpm	720 W	68 dB(A)	220 V	View
LWBA2D315-138NT-12	3,605 m³/h	927 Pa	2,750 rpm	800 W	84 dB(A)	380 V	View
LWBA2D315-188NT-17	4,120 m³/h	1,082 Pa	2,650 rpm	1,300 W	85 dB(A)	380 V	View
LWFA4D315-188NT-01	4,328 m³/h	576.8 Pa	1,360 rpm	2,200 W	80 dB(A)	380 V	View
LWFA4E315-188NS-02	4,429 m³/h	618 Pa	1,360 rpm	2,300 W	80 dB(A)	220 V	View