Inspired by the efficiency concept

Air Fin Coolers

We constantly underpin our technological leadership with new product developments. This includes special high-performance finned tubes with optimized material and design, enabling clearly more efficient heat exchange. This pays off for you in two ways. The investment cost is reduced and you save in operating costs. Both benefits can be achieved while enjoying high-level product reliability even under extreme conditions.

Kelvion Air Fin Cooler
Kelvion Air Fin Cooler
Kelvion Air Fin Cooler
Kelvion Air Fin Cooler
Kelvion Air Fin Cooler
Kelvion Air Fin Cooler

In addition, we offer you a choice you rarely find elsewhere – the choice between aluminum fins and steel fins on the finned tube systems. Both variants have specific benefits.

Finned tube bundles with aluminum fins are considerably more lighter, are insensitive to soiling and easy to clean. On the other hand, systems using galvanized steel offer a very long service life of up to 30 years, are extremely resistant to mechanical influences such as hailstorms and provide optimum corrosion protection as aluminum.

Air coolers are used in fundamentally different and sometimes extremely difficult ambient conditions. This refers to both production processes and climate-related conditions. What is needed are designs that are up to these requirements at any time, while also taking the customers’ wishes into account.

From the very beginning, our experts have designed and realised the most varied units for all branches of industry. Multi-faceted experience combined with an eye for everything that is feasible produce solutions which integrate perfectly into your industrial production.

Get in touch with Kelvion in United StatesOr give us a call +43 7735 8000 6300
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We offer numerous different air cooler versions in order to meet differing requirements of the process and the place of installation.

  • Vertical configuration
  • Horizontal configuration
  • Roof-mounted configuration
  • In-line configuration

Regardless of the selected design, free air feeding and discharge must be ensured. Where space is at a premium, roof-mounted configurations are frequently used.

Finned Tubes CW-Tube / Groovy Fin

With the method of numerical flow simulation (CFD) we have e.g. investigated the effects of new turbulators on the fins. The results were validated by wind tunnel measurements. A patent was applied for the new Invention.

Product advantages:

  • Lighter, higher efficiency and more silent than conventional products
  • High efficiency in heat transfer and flow performance
  • Up to 25 % less requirement of heat exchanger tubes
  • Up to 30 % less electrical power consumption of the fans
  • Reduced investment and operating costs
  • Reduction of CO2- and noise Emission

Groovy fin
Product advantages:

  • New patented high-performance finned tube, pioneering technology
  • Resists high loads, both thermally and mechanically
  • Extremely dimensionally stable
  • Hardly any maintenance is required – maximum reliability
  • Optimized surface, less fans – clearly reduced energy consumption
  • Less space required, less cabling – less installation effort
  • Economically very profitable – saves labour, material and costs

The fin strip is subject to tensile stress and inserted into a pre-shaped spiral core tube groove and firmly rolled into the groove in a rolling process using high pressure. The displaced material is then pressed on the fin side.

Fin material: aluminum

Core tube material: all materials which can be easily machined.

Maximum operating temperature: 400°C

Finned Tubes Extruded / L Fin

Product advantages:

  • Compared with similar fins, extruded fins consist of more than 40% more aluminium, thus the core tube is very well protected against atmospheric corrosion
  • Very sturdy design – resists mechanical damage very well
  • Easy to clean with steam or water
  • Different core tube materials for different requirements – can be used with almost all chemically aggressive media

Result: a mechanically solid joint with good heat transfer properties

Fin material: aluminum

Core tube material: all metal materials

Maximum operating temperature: 300°C

L Fin
Product advantages:

  • Large contact area between tube and fins enable good heat transfer
  • Developed for low temperatures necessitating a certain corrosion protection of the tube wall

The fin base is pre-shaped to form a L and wrapped around the core tube while applying tensile stress. Every fin has contact with an adjoining fin. This protects the core tube when handling less aggressive media. In addition, the manufacturing process enables the use of relatively thinwalled core tubes.

Fin material: aluminum

Core tube material: All metal materials can be used.

Maximum operating temperature: 130°C

Finned Tubes FE/KE/AE / XE / PI/HI

Product advantages:

  • The elliptic shape enables excellent thermodynamic properties
  • Less vortex formation results in reduced pressure loss on the air side
  • Additional baffle surfaces/turbulators achieve very good heat transfer coefficients
  • Rectangular fins ensure that the face area remains small and that the design volume is used optimally

Fin material: steel

Core tube material: steel / stainless steel

Maximum operating temperature: 360° C

Product advantages:

  • Special design for high pressure ratings and restricted space
  • The excellent properties of galvanized tubes with steel fins are combined with the geometry of round tubes, resulting in high rigidity
  • Reduced size due to design featuring two tubes in one fin

Fin material: steel

Core tube material: steel/stainless steel

Maximum operating temperature: 360 °C

Product benefits:

  • Thermodynamic properties and air-side pressure losses are similar to the FE tube type
  • Larger clearance between the elliptic core tubes for applications with increased soiling hazard – provides good cleaning possibilities
  • Is preferably used for combustion air heaters and air coolers

Fin material: steel

Core tube material: steel/stainless steel

Maximum operating temperature: 360 °C


Through bolts
This header version has a removable cover to enable easy inspection and cleaning of the inner tube walls. For inspections it is generally sufficient to remove only a manifold because this already offers a partial view of the tubes through the nozzles.

Stud bolts
In this version, the nozzles are arranged at the top and at the bottom. The benefit: you can remove the cover plate without dismantling any tubes. The cover plates are also available with built-in nozzles. Depending on temperature and gasket type, this header works up to an operating pressure of 40 bar. We can manufacture special versions for all applications beyond this range. Both cover plate versions have either welded-in or rolled-in tubes.

The inexpensive header design is mainly used for clean products or a high vacuum. The tubes are welded into tube sheets, and D type headers with the required connecting nozzles are welded on.

Here the tubes are usually rolled into the plug headers; in special cases, they are directly welded into the tube sheets. A threaded plug with a soft iron seal is provided opposite every tube; this seal can be easily removed for re-rolling or internal cleaning of the tubes. As the nozzles are fitted at the top or bottom of the header, dismounting the tube connections is not required for inspections and cleaning. The header design can be used even at high pressure levels.

Return segm.
A threaded plug with a soft iron seal is provided opposite every tube. This plug can be simply removed for re-rolling or for internal cleaning of the tubes.

Return bends
This high-pressure header, just as the variant with the return segments, is perfectly suited for high temperature differences as the finned tubes expand individually.

High Pressure Prehumidification

The high-pressure water, which enters the cooling air flow, lowers the air temperature and therefore improves heat Dissipation.

Various conditions can make it sensefull to install this additional application.
Water is injected into cooling air:

  • To improve the cost efficiency of air cooling when product temperatures are low
  • To increase the cooling capacity of an existing installation or
  • To reduce the size of a new cooling plant

The water spray system for such an installation is sized for “worst-case” air conditions specified together with the client. Depending on weather conditions, water may be precipitated, though, because the air is saturated, but the water that collects underneath the cooler does not necessitate the installation of a water basin.

As piping configurations differ from site to site, we exclude interconnecting pipework usually from our supplies.

Air cooling equipment
We supply all cooler pipework including the water loops, the nozzles and the nozzle suspension system. The connecting flange is normally the battery limit. To optimize water flow, parallel coolers can be equipped with optional motorized ball valves.

Pumping system
We supply the water pump, the upstream strainer and upstream and downstream isolating valves. An optional overflow valve is provided for installations consisting of several parallel coolers.


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