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.
- ImpellerØ305 mm
- Max airflow4,362 m³/h
- Max static pressure491 Pa
- Voltage220 V
- Speed1,100 rpm
LWDD12-9-EC DD Series EC Direct Drive Centrifugal Blower Ø305 mm
Ø305 mm | EC | Max airflow 4,362 m³/h | Max static pressure 491 Pa
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Need a non-standard size or another format? Ask an engineer or search the download center.
LWDD12-9-EC is a LONGWELL DD Series EC Direct Drive Centrifugal Blower from the Impeller Ø280–500 mm range, impeller Ø305 mm, rated 220 V EC, maximum airflow 4,362 m³/h, maximum static pressure 491 Pa. The EC motor integrates the drive electronics: stepless speed control by 0–10 V or PWM signal, speed feedback and high efficiency at part load.
Technical data
| Model | LWDD12-9-EC |
|---|---|
| Series | LWDD12 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220 V |
| Frequency | 50 Hz |
| Speed | 1,100 rpm |
| Max. airflow | 4,362 m³/h |
| Max. static pressure | 491 Pa |
| Impeller diameter | Ø305 mm |
| Dimensions | 12-9 |
Typical applications
- Commercial kitchen extraction
- Ventilation units and AHUs
- Process and fume extraction
Series LWDD12: 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 (Ø305 mm · EC)
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 | |
|---|---|---|---|---|---|---|---|
| LWDD12-9-EC this model | 4,362 m³/h | 491 Pa | 1,100 rpm | — | — | 220 V | |
| LWDD12-12-EC | 1,489 m³/h | 437 Pa | 960 rpm | — | — | 220 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Related products
Other models in the LWDD12 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWFA-E-300-02Ø300 mm · 2,900 m³/h · 408 Pa · ACadjacent size
LWFA-E-300-01Ø300 mm · 4,300 m³/h · 720 Pa · ACadjacent size
LWFA-E-300-03Ø300 mm · 3,100 m³/h · 422 Pa · ACadjacent size
LWFA-E-280-01Ø280 mm · 2,600 m³/h · 490 Pa · ACadjacent size
LWFA-E-280-02Ø280 mm · 2,100 m³/h · 220 Pa · ACadjacent size
LWFA-E-350-01Ø350 mm · 2,950 m³/h · 370 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBE3G280-102NT-17Ø280 mm · 4,377.5 m³/h · 1,751 Pa · ECsimilar duty
LWFE3G280-102PT-08Ø280 mm · 4,377.5 m³/h · 1,751 Pa · ECsimilar duty
LWFA4D315-188NT-01Ø315 mm · 4,328 m³/h · 576.8 Pa · ACsimilar duty
LWBE3G310-138PT-04Ø310 mm · 4,398 m³/h · 824 Pa · ECsimilar duty
LWBE3G310-138NT-05Ø310 mm · 4,398.1 m³/h · 824 Pa · ECsimilar duty
LWFE3G280-138DS-02Ø280 mm · 4,422 m³/h · 592 Pa · ECsimilar dutySee all Commercial Centrifugal Blowers · select by duty point