AL7-30 to AL10-300


Performance Range



Axial-flow impeller as cast part from EN AB 43000, with guide device, profiled impeller blades with no edges in the flow surface, sturdy steel housing, foot mounting.


Direct or star-delta starting
Optional: pole-changeable, speed-regulated (FU)


  • Voltage ranges 230 – 1000 Volt
    Three-phase AC squirrel-cage motors S1
                                      in special design
  • Protection class >= IP 55; insulation class F, tropicalised,
                                            permanently lubricated
  • Energy efficiency class >= IE2
  • Terminal box position: top
  • PTC thermistor


Primer with top coat, alkyd resin Silac,
total layer thickness min. 180 μm
Standard colour: Pure white (RAL9010)


Sealed motor, dust disks, hard coated impeller, special coating, vibration dampers, stall point monitoring, impact protection,
VFD compatibility, cold environment, motor monitoring,
incr. efficiency class, vibration sensors, volume flow, pressure difference, adjustable blades

TECHNIcal execution according to

Machinery Directive: EU Directive 2006 / 42 / EC
ErP ecodesign: Directive 2009 / 125 / EC
Test bench run according to DIN EN ISO 5801 / 2017


Version with explosion protection

PROTECTION CLASS: Fire-damp proof*, explosion-proof*

TYPE: dAL7-30 to dAL10-300
Optional: Bifurcated axial fans

Spark protection

ACCORDING TO: Directive 2014 / 34 / EU

* also available according to international explosion protection regulations


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What we do

Customer oriented and innovative solutions for the health of your employees

Ventilating and Exhausting Systems for:

  • Mining of any kind
  • Tunnel Construction
  • Road Construction
  • Underground Irrigation and Cavern Systems
  • Special Construction

Breathe the Difference

Our highly qualified expert team of engineers will not only continue to the longstanding tradition of the KORFMANN quality and performance in the field of ventilation for mining and tunneling, underground systems of any kind and industrial sectors, but also increase it to the advantage of your company.

Due to our high affinity for technology, we find the perfect solution for your requirements – no matter in which area. The innovative spirit of our engineers helps us to continuously develop our products and offer you solutions and products also related to industry 4.0.

You can be absolutely certain to have Korfmann Lufttechnik GmbH as a reliable partner at your side. We look forward to convincing you of our efficiency and ability to supply the best product for your future projects.