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.
- ImpellerØ178 mm
- Max airflow1,923 m³/h
- Max static pressure321 Pa
- Voltage220 V
- Speed1,440 rpm
- Input power350 W
LWDD7-7-EC DD Series EC Direct Drive Centrifugal Blower Ø178 mm
Ø178 mm | EC | Max airflow 1,923 m³/h | Max static pressure 321 Pa
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 18-month warranty
- CE · ETL · RoHS
Engineering files (on request)
CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.
CAD models contain the blade geometry and are not downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.
Downloads for LWDD7-7-EC
PDFDatasheet · 865 KBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWDD7-7-EC is a LONGWELL DD Series EC Direct Drive Centrifugal Blower from the Impeller Ø178–254 mm range, impeller Ø178 mm, rated 220 V EC, maximum airflow 1,923 m³/h, maximum static pressure 321 Pa, input power 350 W. 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 | LWDD7-7-EC |
|---|---|
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220 V |
| Frequency | 50 Hz |
| Current | 2.37 A |
| Input power | 350 W |
| Speed | 1,440 rpm |
| Max. airflow | 1,923 m³/h |
| Max. static pressure | 321 Pa |
| Storage temperature | -25 ~ 80℃ |
| Humidity | 0 ~ 50 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø178 mm |
| Dimensions | 7-7 |
| Impeller material | Volute assembly and impeller assembly are galvanized sheet |
| Balance grade | G6.3 |
| Vibration standard | JB/T 8689 |
| Service life | 30,000Hours(L10), At 40 °Croom, humidity 15%~50%RH |
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 (Ø178 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 | |
|---|---|---|---|---|---|---|---|
| LWDD7-7-EC this model | 1,923 m³/h | 321 Pa | 1,440 rpm | 350 W | — | 220 V | |
| LWDD7-5-EC | 852 m³/h | 304 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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LWDD9-7-ECØ229 mm · 363 m³/h · 486 Pa · ECadjacent size
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LWAE3G300SS-5PEW-12Ø300 mm · 1,906 m³/h · 118 Pa · ECsimilar duty
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LWAE3G300ST-5PEW-13Ø300 mm · 1,906 m³/h · 118 Pa · ECsimilar dutySee all Commercial Centrifugal Blowers · select by duty point