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.
- ImpellerØ229 mm
- Max airflow139 m³/h
- Max static pressure587 Pa
- Voltage220 V
- Speed1,440 rpm
LWDD9-9-EC DD Series EC Direct Drive Centrifugal Blower Ø229 mm
Ø229 mm | EC | Max airflow 139 m³/h | Max static pressure 587 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.
LWDD9-9-EC is a LONGWELL DD Series EC Direct Drive Centrifugal Blower from the Impeller Ø178–254 mm range, impeller Ø229 mm, rated 220 V EC, maximum airflow 139 m³/h, maximum static pressure 587 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 | LWDD9-9-EC |
|---|---|
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220 V |
| Frequency | 50 Hz |
| Speed | 1,440 rpm |
| Max. airflow | 139 m³/h |
| Max. static pressure | 587 Pa |
| Impeller diameter | Ø229 mm |
| Dimensions | 9-9 |
Typical applications
- Commercial kitchen extraction
- Ventilation units and AHUs
- Process and fume extraction
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 (Ø229 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 | |
|---|---|---|---|---|---|---|---|
| LWDD9-9-EC this model | 139 m³/h | 587 Pa | 1,440 rpm | — | — | 220 V | |
| LWDD9-7-EC | 363 m³/h | 486 Pa | 1,440 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
Adjacent sizesOne size up when airflow is short, one size down when it is too much
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LWAD9225HX-0592 mm · 139.8 m³/h · 91 Pa · DCsimilar dutySee all Commercial Centrifugal Blowers · select by duty point