ES3-8 to ES9-700


ES3-8 To ES9-700

Performance range



Axial-flow impeller as cast part from EN AB 43000, spark
protected. Thrust collar made of EN AB 43000 or brass, with guide vanes, profiled blades with no edges in the flow surface, sturdy steel housing, foot mounting.

Including: Sealed motor


Direct starting
Optional: star-delta, pole-changeable, variable speed


  • Voltage ranges 400 – 1140 Volt
    Three-phase AC squirrel-cage motors S1
                                      in special design
  • Flame-proof enclosure protection
    “d” or “de” according to DIN EN 60079-1
  • Protection class >= IP 55; insulation class F, tropicalised
  • Energy efficiency class >= IE2
  • Terminal box position: top
  • PTC thermistor
  • Optional: Hydraulic drive sizes from
                        Ø 300 mm to Ø 600 mm



Primer with top coat, alkyd resin Silac,
total layer thickness min. 180 μm

Standard colour: Pure white (RAL9010)


Sealed motor, dust disks, hard coated wheel, special coating, vibration dampers, stall-point monitoring, impact protection,
VFD compatibility compatible, cold environment, motor monitoring,
incr. efficiency class, vibrations sensors, volume flow, pressure difference and gas monitoring, adjustable blades, bifurcated fan, voltage switchable or solderable
Variant as bifurcated fan
Hint: PU version with two motor power stages.
Example: ES9-700/110 means first stage 11 kW,
main stage 70 kW (characteristic curves for both stages included in scope of delivery)

Technical execution according to

Machinery Directive: Directive 2006/42/EC
ErP ecodesign Directive 2009 / 125 / EC
Explosion protection according to guideline 2014 / 34 / EU
Test bench run according to DIN EN ISO 5801 / 2017

English Version of our Website ist coming soon …

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.