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Low pressure axial fans (duct installation)

HRFD 500/8/4

HRFD 500/8/4

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

Ref.-No. 00407

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.:00407
Type:HRFD 500/8/4
Flow rate free-blowing:8280 m³/h
RPM:696/1385 min-1
Number of poles:8 / 4
Voltage:400 / 400 V , 3 W , 50 / 50 ph
Rated current (FLC) uncontrolled:0.52/1.48 A
Nominal power:137/688 W
Max. air flow temperature (uncontrolled):40 °C
IP protection category:55
Insulation class:B
PRODUCT_DETAILPAGE_wheel_diameter:500
Weight:22 kg
Wiring diagram no.:472
Acoustic data
Case breakout 61 dB(A) in 4 m