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DC Backward-Curved Centrifugal Fan 2026 catalogue (PDF)

Backward-curved wheels reach high efficiency with a non-overloading power curve; widely used in AHUs, data-centre cooling, clean rooms and heat-recovery units. DC versions run on low-voltage DC supply, suited to battery, vehicle and electronics equipment. This LONGWELL 2026 catalogue runs to 16 pages and lists 36 model numbers.

Pages
16
File
PDF · 8.7 MB
Edition
2026
Language
English
Model numbers
36
Single-size PDFs
10
Motor type
DC
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Free download — contact details are asked once, then every file downloads directly. Only need one size? Download it separately ↓

What’s inside

  • Performance curves
  • Dimensional drawings and mounting sizes
  • Noise data
  • Typical applications
  • Also available as 10 single-size PDFs (Ø133–400 mm)

Download a single size

Each file contains the pages for one impeller / frame size — smaller and faster on mobile.

Ø133 mm1 pages · 1.2 MB Ø175 mm2 pages · 2.0 MB Ø190 mm2 pages · 1.9 MB Ø220 mm1 pages · 1.2 MB Ø225 mm2 pages · 1.3 MB Ø250 mm3 pages · 2.1 MB Ø280 mm2 pages · 2.1 MB Ø310 mm4 pages · 3.1 MB Ø355 mm1 pages · 1.2 MB Ø400 mm1 pages · 889 KB

Model numbers in this catalogue (36)

Click a model number to find its datasheet, drawing and curve.

LWBD-133LWBD-175LWBD-190LWBD-220LWBD-225LWBD-250LWBD-280LWBD-310LWBD-355LWBD-400LWBD3G133-072NH-03LWBD3G133-072NM-02LWBD3G175-072NH-03LWBD3G175-072NM-02LWBD3G175-072NM-04LWBD3G190-072NH-05LWBD3G190-072NM-04LWBD3G190-092NH-07LWBD3G190-092NM-06LWBD3G220-092NH-05LWBD3G220-092NM-04LWBD3G225-092NH-05LWBD3G225-092NH-06LWBD3G225-092NM-04LWBD3G250-072NZ-07LWBD3G250-092NH-05LWBD3G250-092NH-06LWBD3G280-092NH-04LWBD3G280-092NH-05LWBD3G310-092NH-02LWBD3G310-092NM-01LWBD3G310-092NZ-05LWBD3G310-102NH-03LWBD3G310-102NH-04LWBD3G355-102NH-04LWBD3G400-102NH-03

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