HRFD 250/2 EX
HRFD 250/2 EX
High efficiency axial fan 3-ph., explosion proof, air flow direction 'B', II 2G Ex h IIB + H2 T3 Gb


Ref.-No. 00471
Features
flanges on both ends, directly driven, explosion proof according to ATEX. 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. High efficient, profiled impeller with 7 blades, dynamically balanced to DIN ISO 1940 and VDI 2060 class 6.3, manufactured from impact resistant anti static polymers. Suitable for -30°C to +40°C. Electrical resistance of less than 1 Ohm. Totally enclosed, maintenance free 3-phase squirrel cage motor, low noise sealed for life ball bearings, not controllable. Explosion proof execution according to ATEX.Additional data and accessories
Technical Data
General Information
Ref.-No.: | 00471 |
---|---|
Type: | HRFD 250/2 EX |
Flow rate free-blowing: | 2070 m³/h |
RPM: | 2800 min-1 |
Number of poles: | 2 |
Voltage: | 400 V , 3 ph , 50 Hz |
Rated current (FLC) uncontrolled: | 0.75 A |
Nominal power: | 250 W |
Max. air flow temperature: | 40 °C |
Explosion proof: | |
IP protection category: | 54 |
Insulation class: | F |
PRODUCT_DETAILPAGE_wheel_diameter: | 250 mm |
Weight: | 7,00 kg |
Wiring diagram no.: | 470 |
Acoustic data
Case breakout | 55 dB(A) in 4 m |
---|
Quicklinks
Additional data and accessories
Helios Standorte in Europa.

Helios Ventilatoren GmbH + Co KG
Lupfenstraße 8
78056 Villingen-Schwenningen - DE
Tel.: +49 (0) 7720 / 606-0
Fax: +49 (0) 7720 / 606-166
E-Mail:

Helios Ventilatoren Ges. mbH
Siemensstrasse 15
6063 Rum/Innsbruck
Tel.: +43 (0) 512/26 59 88
Fax: +43 (0) 512/26 59 88 – 85
E-Mail:

Helios Ventilatoren AG
Tannstrasse 4
8112 Otelfingen
Tel.: +41 (0)44 735 36 36
Fax: +41 (0)44 735 36 37
E-Mail:

Helios Ventilateurs
9 rue du gibier
67120 Molsheim
Tel.: +33 (0)3 90 40 48 48
Fax: +33 (0)6 78 03 12 50
E-Mail:

Helios Ventilation Systems
5 Crown Gate, Wyncolls
RoadSeveralls Industrial Park
Colchester, Essex CO4 9HZ
Tel.: +44 (0)1206 228 500
Fax: +44 (0)1206 228 501
E-Mail: