Industrial dry cooler

Kaltra updates its Mistral series dry coolers

The Mistral series is the most popular range of dry coolers offered by Kaltra that includes flat and V-shaped models with finned-pack copper-aluminum coils and capacities of up to 3MW in dry operation.

Starting from Q2 2023, the series will be extended for application flexibility and configurable with the following features:

  • Power supplies of 50Hz and 60Hz
  • Circulator pumps
  • 7 heat exchanger fin spacings from 1.8mm to 3.6mm
  • Multiple options for heat exchanger circuiting to balance capacity/pressure drops
  • Anti-corrosion heat exchanger treatments, from painting to cataphoresis coating, suitable for C5-M environments
  • Increased tube wall and fin thickness for the long service life of heat exchangers
  • AC- or EC-motor fans and fan speed controllers
  • High-temperature fan designs to support elevated fluid temperatures
  • Fan diffusers
  • Noise levels are adjustable with fan speed regulation
  • Adiabatic pre-cooling, based on water spray systems or evaporative pads made from cellulose or aluminum, including recirculation pumps
  • Internal frame partitioning into individual per-fan chambers for optimized performance and maintainability
  • Units sized for optimal transport costs

In total, 1473 base dry cooler models are available: 613 models in flatbed design, 380 V-shaped models with single fan rows, and 480 V-shaped models with two fan rows.

Importantly, design optimization led to a 9-percent price reduction for the updated Mistral lineup.

The standard warranty for Mistral series dry coolers remains three years, extendable to 5 years.

Headquartered in Germany and Austria, Kaltra designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillersprecision air conditionersIT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensersdry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminium coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.

For more information on Kaltra and its products call +49 (0) 911 384 333 48 or visit