Trocadores de calor

Refrigerador de ar industrial OK-ELC 0-7


The OK-ELC air cooler series is designed specifi cally for hydraulic applications where high performance and effi ciency are required and physical size must be minimized to allow easy installation.


Product Features

These coolers use a combination of high performance cooling elements and high capacity, compact AC electrically powered fans to give long
trouble-free operation in arduous hydraulic applications.

The compact design allows the coolers to fitmost equipment and provide the highest cooling performance in heat dissipation whilst minimizing the space required.

  • Compact, effi cient, high performance
  • Cooling range 1 – 28 kW
  • AC motors in 230/400 Volt 50/60 Hz


Application Field
Systems with small and medium cooling requirements, such as

  • Industrial power units
  • Lubrication systems
  • Machine tools


Operation Data


Oils (mineral oils, synthetic oils, high viscosity oils, biological oils, phosphate ester)
Water-glycol (cooling fluid)

Viscosity 2,000 mm²/s (standard)

Temperature range

-Minimum / maximum ambient temperature:

  •  – 20 °C to + 40 °C (standard)

-Minimum / maximum temperature of the medium:

  • + 20 °C to + 130 °C

Fan at max. speed (max. volume of air) must be avoided when operating a cooler at which the temperature difference between the medium inlet at the cooler and the ambient temperature can be greater than 50 °C. Quick changes in the temperature of the cooling element material can lead to a signifi cant reduction in service life or to direct damage of the cooling element due to thermal shock.

Please contact the technical sales department to receive information about controlled fan drives.

Pressure resistance of the cooling element

  • Dynamic operating pressure: 16 bar
  • Static operating pressure: 21 bar

Fan Axial fan in suction version (standard)
Axial fan in pushing version on request (note: approx. 10 % less cooling capacity)


  • AC motor
  • Protection class IP20 (OK-ELC 0)/Protection class IP55 (OK-ELC 1-7)
  • Insulation class F Other versions on request.

ErP The fan unit of the OK-ELC corresponds to the minimum effi ciency levels specifi ed in the Ecodesign directive or ErP directive (Energy-related Products) 2009/125/EC.

Noise levels

See technical data
The noise levels are only reference values as the acoustic properties of a room, connections and refl ection have an effect on the noise level.


  • Integrated pressure bypass valve (IBP) or integrated thermal pressure bypass valve (IBT) (cannot be retrofi tted, also see options)
  • Thermostats
  • Air fi lter grid or air fi lter mat
  • Vibration damper