ImpellerØ280 mm11.0 in
Max airflow3,811 m³/h2,243 CFM
Max static pressure463.5 Pa1.86 in. wg
Voltage380 V
Speed1,400 rpm
Input power1,400 W1.88 hp
Noise82 dB(A)

LWFA4D280-188ST-01 AC Single Inlet Forward Centrifugal Blower Ø280 mm

Ø280 mm | AC | Max airflow 3,811 m³/h | Max static pressure 463.5 Pa | 82 dB(A)

SKU: LWFA4D280-188ST-01 Categories: Centrifugal Fans, Impeller Ø160–315 mm, Single Inlet Forward Curved Blowers

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Samples in 1–3 days
Production 15–30 days
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.

LWFA4D280-188ST-01 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFA4D280-188ST-01 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Series catalogue

PDFLWFA LWFA Series Direct Driven centrifugal blower · 1.4 MB

Covers the whole series, not only this model.

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

LWFA4D280-188ST-01 is a LONGWELL AC Single Inlet Forward Centrifugal Blower from the Single Inlet Forward Curved Blowers range, impeller Ø280 mm, rated 380 V AC, maximum airflow 3,811 m³/h, maximum static pressure 463.5 Pa, noise 82 dB(A), input power 1,400 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model	LWFA4D280-188ST-01
Series	LWFA4D280
Motor type	AC
Phase	3-phase
Rated voltage	380 V
Frequency	50 Hz
Current	2.5 A
Input power	1,400 W
Speed	1,400 rpm
Max. airflow	3,811 m³/h
Max. static pressure	463.5 Pa
Noise	82 dB(A)
Ambient temperature	-30 ~ 60 °C
Impeller diameter	Ø280 mm
Rotor diameter	188
Impeller material	Galvanised sheet steel
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 LWFA4D280: 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.

Alternatives with the same impeller (Ø280 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
LWFA4D280-188ST-01 this model	3,811 m³/h	463.5 Pa	1,400 rpm	1,400 W	82 dB(A)	380 V
LWEA280S(T)M-155E	1,605 m³/h	60 Pa	1,450 rpm	180 W	—	220 V	View
LWBA2D280-102NT-06	1,833 m³/h	773 Pa	2,650 rpm	250 W	80 dB(A)	380 V	View
LWBA2E280-102NS-05	1,833 m³/h	773 Pa	2,650 rpm	250 W	80 dB(A)	230 V	View
LWFA-E-280-02	2,100 m³/h	220 Pa	—	—	64 dB(A)	—	View
LWBA2D280-102NT-08	2,163 m³/h	773 Pa	2,700 rpm	330 W	80 dB(A)	380 V	View
LWBA2E280-102NS-07	2,163 m³/h	773 Pa	2,700 rpm	330 W	80 dB(A)	230 V	View
LWFA4E280-188NS-02	2,284 m³/h	391.4 Pa	1,360 rpm	1,600 W	77 dB(A)	220 V	View
LWFA6E280-138NS-04	2,318 m³/h	247.2 Pa	900 rpm	450 W	65 dB(A)	220 V	View
LWFA6D280-138NT-03	2,318 m³/h	247.2 Pa	900 rpm	450 W	65 dB(A)	380 V	View
LWFA-E-280-01	2,600 m³/h	490 Pa	—	—	69 dB(A)	—	View
LWBA2D280-138NT-09	2,678 m³/h	917 Pa	2,750 rpm	500 W	78 dB(A)	380 V	View
LWBA2D280-138NT-10	2,833 m³/h	927 Pa	2,900 rpm	680 W	80 dB(A)	380 V	View
LWEA280S(T)M-156E	3,202 m³/h	232 Pa	2,900 rpm	250 W	—	220 V	View
LWFA4D280-188NT-01	3,502 m³/h	463.5 Pa	1,360 rpm	1,700 W	77 dB(A)	380 V	View