DC Centrifugal Blowers
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DC Centrifugal Blowers — selection guide
DC Centrifugal Blowers: 179 models, frame sizes 40–120 mm, maximum airflow 2–79 m³/h, static pressure to 570 Pa, DC motors, across 12 series. 150 of them carry a measured P-Q curve and 179 a dimensional drawing.
DC centrifugal blowers (LWFD) push air through a narrow outlet at higher static pressure than an axial fan of the same size: frames Ø40, 50, 60, 75, 97 and 120 mm (LWFD4010 to LWFD12032), 2.4–80 m³/h at 23–570 Pa, on 5 / 12 / 24 / 48 V. Each frame has 14–15 variants across voltages and speed grades. They are the fans for ducted cooling paths — heatsinks, battery packs, laser and medical modules, respiratory devices — where the air has to be directed rather than blown across an enclosure.
How to select from this range
- Use a blower where the air path has significant resistance (heatsink fins, ducts, filters); an axial fan stalls there.
- Match the outlet size and direction to the duct; blowers are handed.
- Choose the frame by pressure need: Ø75–120 mm reach 400–570 Pa, Ø40–60 mm 200–400 Pa.
Where these fans are used
- Heatsink and duct cooling in electronics
- Battery packs and chargers
- Medical and respiratory devices
- Laser and optical modules
Every figure above is measured on our own test rigs per AMCA 210 / ISO 5801 methods — see the test labs and certificates. Final selection is confirmed at the duty point and by project validation.
FAQ — DC Centrifugal Blowers
When should I use a DC blower instead of an axial fan?
When the air must pass through a channel with resistance — a finned heatsink, a duct, a filter — a blower keeps airflow where an axial fan of the same size would stall. At free air the axial fan moves more.
Which blower frames are ETL listed?
The DC centrifugal blower line is ETL listed (Intertek control no. 5022563) to UL 507 / CSA C22.2 No. 113 for 12 / 24 / 48 V.