Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ355 mm14.0 in
- Max airflow5,974 m³/h3,516 CFM
- Max static pressure1,339 Pa5.38 in. wg
- Voltage380 V
- Speed2,700 rpm
- Input power2,500 W3.35 hp
- Noise90 dB(A)
LWBA2D355-188NT-18 AC Backward Curved Centrifugal Fan Ø355 mm
Ø355 mm | AC | Max airflow 5,974 m³/h | Max static pressure 1,339 Pa | 90 dB(A)
- Direct from LONGWELL
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Performance curve (P-Q) LWBA2D355-188NT-18
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 380 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 LWBA2D355-188NT-18
Files for LWBA2D355-188NT-18: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.
Technical description LWBA2D355-188NT-18
LWBA2D355-188NT-18 is a LONGWELL AC Backward Curved Centrifugal Fan from the Backward Curved Centrifugal Fans range, impeller Ø355 mm, rated 380 V AC, maximum airflow 5,974 m³/h, maximum static pressure 1,339 Pa, noise 90 dB(A), input power 2,500 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.
Technical data
| Model | LWBA2D355-188NT-18 |
|---|---|
| Series | LWBA2D355 |
| Motor type | AC |
| Phase | 3-phase |
| Rated voltage | 380 V |
| Frequency | 50 Hz |
| Current | 4 A |
| Input power | 2,500 W |
| Speed | 2,700 rpm |
| Max. airflow | 5,974 m³/h |
| Max. static pressure | 1,339 Pa |
| Noise | 90 dB(A) |
| Ambient temperature | -40 ~ 65 °C |
| Storage temperature | -10 ~ 40℃ |
| Humidity | 0 ~ 95 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø355 mm |
| Rotor diameter | 188 mm |
| Impeller material | Aluminum Alloy |
| Protection class | IP54 |
| Insulation class | F |
| Bearing | Maintenance-free ball bearings |
| Duty | S1 |
| Vibration standard | JB/T 8689 |
| Service life | 30,000Hours(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 LWBA2D355: 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).
PDFISO 9001 / 14001 / 45001 management system certificateNeed a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.
How to order LWBA2D355-188NT-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.
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)
Alternatives with the same impeller (Ø355 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 | |
|---|---|---|---|---|---|---|---|
| LWBA2D355-188NT-18 this model | 5,974 m³/h | 1,339 Pa | 2,700 rpm | 2,500 W | 90 dB(A) | 380 V | |
| LWBA4E355-102NS-16 | 2,636 m³/h | 410 Pa | 1,425 rpm | 203 W | 69.9 dB(A) | 230 V | View |
| LWBA4D355-102NT-06 | 2,812 m³/h | 515 Pa | 1,500 rpm | 250 W | 65 dB(A) | 380 V | View |
| LWBA4D355-102NT-09 | 2,936 m³/h | 464 Pa | 1,380 rpm | 200 W | 65 dB(A) | 380 V | View |
| LWBA4E355-102NS-07 | 2,936 m³/h | 464 Pa | 1,350 rpm | 210 W | 65 dB(A) | 230 V | View |
| LWBA4E355-102NS-15 | 3,035 m³/h | 546 Pa | 1,635 rpm | 268 W | 73.8 dB(A) | 230 V | View |
| LWBA4D355-102NT-10 | 3,245 m³/h | 515 Pa | 1,600 rpm | 270 W | 67 dB(A) | 380 V | View |
| LWBA4E355-102NS-08 | 3,245 m³/h | 515 Pa | 1,550 rpm | 280 W | 67 dB(A) | 230 V | View |
| LWBA4E355-138NS-13 | 3,399 m³/h | 464 Pa | 1,400 rpm | 400 W | 72 dB(A) | 230 V | View |
| LWBA4D355-138NT-11 | 3,399 m³/h | 464 Pa | 1,450 rpm | 360 W | 72 dB(A) | 380 V | View |
| LWBA4E355-138NS-14 | 4,017 m³/h | 618 Pa | 1,700 rpm | 600 W | 77 dB(A) | 230 V | View |
| LWBA4D355-138NT-12 | 4,017 m³/h | 618 Pa | 1,700 rpm | 550 W | 77 dB(A) | 380 V | View |
| LWFA6D355-188NT-02 | 4,172 m³/h | 412 Pa | 900 rpm | 1,150 W | 70 dB(A) | 380 V | View |
| LWBA2D355-188NT-17 | 4,635 m³/h | 1,339 Pa | 2,700 rpm | 1,600 W | 90 dB(A) | 380 V | View |
| LWFA4D355-188NT-01 | 5,665 m³/h | 906.4 Pa | 1,340 rpm | 3,500 W | 80 dB(A) | 380 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Other models in the LWBA2D355 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA4E315-102NS-06Ø315 mm · 2,163 m³/h · 412 Pa · ACadjacent size
LWFA6D315-138NT-03Ø315 mm · 2,987 m³/h · 249.26 Pa · ACadjacent size
LWFA4E315-188NS-02Ø315 mm · 4,429 m³/h · 618 Pa · ACadjacent size
LWFA4D315-188NT-01Ø315 mm · 4,328 m³/h · 576.8 Pa · ACadjacent size
LWFA6E315-138NS-04Ø315 mm · 3,605 m³/h · 249.26 Pa · ACadjacent size
LWBA6E315-102NS-07Ø315 mm · 1,030 m³/h · 155 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWAA4D420S-5MEB-04Ø420 mm · 5,974 m³/h · ACsimilar duty
LWAA4E420S-5MEB-02Ø420 mm · 5,974 m³/h · ACsimilar duty
LWFA8D400-188NT-03Ø400 mm · 5,974 m³/h · 345.05 Pa · ACsimilar duty
LWPVD-500(20")S-016,000 m³/hsimilar duty
LWAE3G500SS-5PKW-15Ø500 mm · 5,900 m³/h · ECsimilar duty
LWAE3G450SS-5MEW-09Ø450 mm · 5,871 m³/h · 163 Pa · ECsimilar dutySee all Backward Curved Centrifugal Fans · select by duty point
Go deeper on longwellfans.com
Application guides, project stories and engineering calculators for centrifugal fans — on our main site.
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