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Low pressure axial fans (duct installation)

HRFD 450/8/4

HRFD 450/8/4

High efficiency axial fan 3-ph., pole-switching, Dahlander windings air flow direction "B"

Ref.-No. 00403

Features

High efficiency axial fan with cylindrical duct with flanges on both ends, directly driven. Cylindrical duct in galvanised sheet steel covering impeller with two flanges on both ends. Dimensions and flange fixing holes to DIN 24155. Terminal box on outer casing. Highly efficient, profiled impeller with 7 blades, dynamically balanced (Class G 6.3 to VDI 2060) and manufactured from impact resistant polymers. Suitable for -30°C to +60°C. Totally enclosed, 3-phase squirrel cage motor, 2-speed (pole switching with Dahlander windings). Maintenance free with low-noise sealed for life ball bearings.

Technical Data

General Information
Ref.-No.:00403
Type:HRFD 450/8/4
Flow rate free-blowing:5810 m³/h
RPM:706/1413 min-1
Number of poles:8 / 4
Voltage:400 / 400 V , 3 W , 50 ph
Rated current (FLC) uncontrolled:0.36/0.92 A
Nominal power:91/404 W
Max. air flow temperature (uncontrolled):50 °C
IP protection category:55
Insulation class:B
PRODUCT_DETAILPAGE_wheel_diameter:450
Weight:22 kg
Wiring diagram no.:472
Acoustic data
Case breakout 58 dB(A) in 4 m