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Radial Fans

Directly Driven Centrifugal Fans

Information about Directly Driven Centrifugal Fans

Our directly driven centrifugal fans and radial fans offer robust construction, high performance, and flexible applications. The fan housings are available in powder-coated steel or stainless steel. The fan wheels are made of galvanized steel, painted steel, aluminum, or stainless steel. 

Technical Features

  • Standard version for medium temperatures up to 80 °C
  • SV version for medium temperatures up to 200 °C
  • Available as directly driven or optional belt-driven
  • Left- and right-hand rotation with freely selectable outlet positions (45° increments)
  • With or without motor support base
  • Protection class IP55 (standard)
  • ErP-compliant radial fans with current IE-class motors
  • Optional protection: IP65, IP66, Iso H, UL/CSA
  • Versions suitable for variable frequency drive (VFD) operation
  • Explosion-proof (Ex) versions available
  • Fans also available without motor
  • Blades and housings optionally in stainless steel
  • Comprehensive accessories: filters, silencers, compensators, flanges
  • Spare parts supply for impellers, guards, filters, etc.
Technical information

Technical information

Here you will find a comprehensive overview of all relevant technical features, performance data, and specifications that are important for a better understanding of functionality and quality.

Fan Variants

Our directly driven radial fans are offered in two configurations:

  • Type 4: with motor support plate for motor stabilization (standard)
  • Type 5: without motor support plate

All fans, except types N and NP, are delivered as Type 4 by default. All models can be supplied in the alternative version upon request.

Minimum pressure

  • Some fans must not operate free-blowing. If the minimum pressure is not reached according to the performance curve, the motor can be overloaded.

Check current consumption

  • During commissioning, the current should be compared with the motor nameplate data.

VFD operation

  • Maximum frequency must not be exceeded. Power changes with the cube of the speed. At very low speeds, an auxiliary fan may be required. Always indicate VFD operation in inquiries or orders.

60 Hz operation

  • Modified impellers are used for 60 Hz networks; performance curves for 50 Hz and 60 Hz are identical.

Connection

  • Use circuit breakers with C-characteristic. For 3-phase motors, a 3-pole breaker must be used to avoid phase loss. Consultation and Inquiry.

To select the optimal radial fan, please provide:

  • Operating point (airflow m³/h, pressure Pa)
  • Medium type and temperature
  • Ambient temperature and application details

You can send our completed inquiry form via email or fax.

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FAQ

Technical references

What is the delivery time for radial fans?

Depending on type and design, between 5 and 10 weeks. 
Fans of the N series are available ex stock with clockwise rotation (subject to prior sale).

All types can be supplied with or without a motor base plate.

All radial fans are available with clockwise or counterclockwise rotation. 
The outlet can be rotated in 45° increments according to customer requirements.

The fans are supplied in powder-coated or painted sheet steel. 
Alternatively, they can also be manufactured in stainless steel. 
The impellers can also be made of aluminum.

The drive motors can be supplied in all common special voltages and designs.

UL/CSA-certified motors can be installed upon customer request.

We can supply suitable accessories such as air filters, mounting flanges, silencers, vibration dampers, etc.

All parts of the radial fans can be supplied as spare parts.