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Low pressure axial fans (duct installation)

HRFD 400/8/4

HRFD 400/8/4

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

Ref.-No. 00399

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 blade impeller from polymers, aerodynamically optimised to the application, dynamically balanced. 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.:00399
Type:HRFD 400/8/4
Flow rate free-blowing:4100 m³/h
RPM:690/1390 min-1
Number of poles:8 / 4
Voltage:400 / 400 V , 3 W , 50 / 50 ph
Rated current (FLC) uncontrolled:0.25/0.6 A
Nominal power:70/250 W
Max. air flow temperature (uncontrolled):40 °C
IP protection category:55
Insulation class:B
PRODUCT_DETAILPAGE_wheel_diameter:400
Weight:13 kg
Wiring diagram no.:472
Acoustic data
Case breakout 56 dB(A) in 4 m