1. Applications
  2. General dehumidification solutions
  3. Drying compressed air

Optimum protection of plants: drying compressed air

Dehumidifiers dry machines and installations exposed to water vapour and thus ensure production reliability.

The most frequent causes for a production stop are too much water vapour in the machines and installations, and corrosion inside the pipelines. Therefore, too humid compressed air should be avoided by all means. An effective option is the use of high-performance dehumidifiers. The answer to the question of how dry the compressed air has to be in order to guarantee optimum production conditions and protection for machines and installations lies in the relative humidity. It must be reduced to less than 50 percent since corrosion is no longer to be expected within this range. Desiccant dehumidifiers from Trotec ensure effective and constant drying of compressed air.

Production stops entail extremely high costs. The company must try to avoid supply bottlenecks, pay their staff as well as specialists charged with extensive troubleshooting and, of course, bear the costs of repairing the damage. Particularly unexpected failures leading to a production stop must be avoided. Therefore, it is essential to maintain and protect the mechanical and electronic equipment of the machines and production facilities on a permanent basis in order to ensure failure-free continuous operation. Particular attention should be paid to the climatic conditions the machines and installations are exposed to – externally, but also internally.

Drying compressed air in a targeted way

Plant failures are often due to corrosion inside the pipeline system or an excessive amount of water vapour inside the machines and installations. Generally, the cause is too humid compressed air. Therefore, too high contents of water vapour must be avoided and the compressed air dehumidified. This requires the use of technology, as this is the only way to avoid permanent damage to the production facilities and downtimes. The desiccant dehumidifiers from Trotec do a competent job – powerful, effective and economical!

Relative humidity

When drying compressed air, there is one crucial question: how dry does it need to be? The answer sounds simple in the first instance: the relative humidity must be below 50 percent since corrosion can almost be ruled out in this range. By the way: The relative humidity level indicates to what degree the air is saturated with water vapour. Correspondingly, a relative humidity value of 50 percent means that the air only contains half the amount of water vapour which it could maximally contain at the respective temperature. If the temperature increases, the air can absorb more water vapour – until it is saturated 100 percent. Then, the dew point has been reached. As of this point the water vapour is given off as condensation. Condensation also forms when air rich in water vapour, i.e. humid air, is cooled down. Rule of thumb: the warmer the air, the more water vapour it can absorb.

The pressure dew point

The dew point serves as a humidity measure as it depends on the water vapour contents in the air. In the case of compressed air, it is referred to as the pressure dew point. If the pressure increases while the temperature remains constant, the dew point will be reached earlier. This means that – compared to a lower pressure – less water can be absorbed. Accordingly, a low dew point always indicates a low water content in the compressed air.

Sophisticated solutions

Industrial desiccant dehumidifiers are used for extracting moisture from compressed air. Trotec offers a number of dehumidification solutions for creating optimum humidity values in a production plant. Whether as a mobile model or for stationary use – the devices are durable, low-maintenance and flexibly configurable. The desiccant dehumidifiers from Trotec are also suited for heat recovery.

The TTR industrial desiccant dehumidifiers for continuous operation

The stationary TTR desiccant dehumidifiers from Trotec ensure constant humidity values, thus protecting the machines and installations against corrosion and harmful water vapour. The devices are “made in Germany” and “made by Trotec”, which means: professional quality meeting the highest demands in production. For stationary industrial applications dehumidifiers often have pipe connections and yet it must be possible to integrate them flexibly into existing process sequences. In this case, our devices can particularly score with their configurable air direction reversal. With the operator side always facing the user, the air flow direction can easily be adjusted as needed by means of a modular conversion. Blowing out dry air to the right and discharging humid air to the left – or the other way round – with the TTR desiccant dehumidifiers the air direction reversal can be carried out with minimal effort.

The mobile TTR desiccant dehumidifiers for flexible use

For a temporary use of true Trotec dehumidification performance, the mobile TTR desiccant dehumidifiers are particularly strong partners. The compact all-rounders are set up at the application site in next to no time and taken into operation at the push of a button. This guarantees pinpoint humidity regulation. Hand-held measuring devices such as thermohygrometers and data loggers like the innovative DL200X complete the dehumidification concept and so enable constant monitoring.

The benefits of our desiccant dehumidifiers in drying compressed air

  • Targeted dehumidification with professional quality “made in Germany” – originally produced by Trotec for an effective discharge of water vapour
  • Powerful and robust models for stationary and mobile use
  • Configurable air direction reversal for all models
  • Low-maintenance and space-saving construction
  • Equipped with manifold functions and extensive features as standard
  • High economic efficiency due to modular assembly design
  • Can be configured individually for any application due to a wide range of equipment options

The Trotec consultants

Whether for flexible use or for drying compressed air continuously: our staff of the Trotec industrial services team will help you to determine which industrial desiccant dehumidifier from Trotec is best suited for your specific application requirements. Our experts will gladly lend their support in planning the necessary capacities and selecting the appropriate models.


Upon request, we also produce customized desiccant dehumidifiers as special models

Upon request, we will readily produce tailor-made desiccant dehumidifiers as special models “made in Germany” perfectly geared to your needs, e.g.:

  • TTR industrial desiccant dehumidifiers with hygienic design
  • TTR industrial desiccant dehumidifiers for PWIS-free dry air
  • TTR industrial desiccant dehumidifiers with extremely low dew point

Makes use of the possibility of having special models with tailored components for your individual needs planned, designed and manufactured in close consultation with our specialists.
Click here to find out more ...

Products for optimal protection of systems

 standard equipment

 optionally available

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Further application examples for air dehumidification

  • Environmental simulation climate chamber

    In climatic chambers and wind tunnels three factors need to be simulated at the best possible rate: air temperature, wind strength and humidity. For the latter, the automotive industry needs dehumidifiers, which also perform well at dew points below 0°C, as well as high-performance desiccant dehumidifiers.

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  • Dehumidifying & air cleaning for coating

    There are three parameters to be controlled when coating car components: room temperature, humidity and the dust content in the air. In addition to dehumidifiers and heating devices we also provide sustainable air cleaners with special volumetric flow regulation for this production stage in the automotive industry.

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  • Dehumidification in tents

    When preparing a tent or another type of temporary accommodation, good room conditions are essential. This applies particularly to makeshift dwellings accommodating large numbers of people. This can be tent cities or container villages for asylum seekers, tent camps for youth groups, tents used as a place to sleep at large events, and also containers serving as a temporary home for seasonal...

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  • Drying hygroscopic bulk material

    Varying and too high humidity values can ruin the pourability of powders and granules – and thus entail high consequential costs. In order for hygroscopic bulk material not to go lumpy nor to block hauling paths, the entire air in the chemical and pharmaceutical production must be pre-dried. Using adsorption dryers of the TTR series that's no problem.

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  • Drying after silo cleaning

    After the cleaning of storage containers and silos you have to count on them to be fully dried for new bulk material to be protected against moisture from the beginning. And since drying can be effected in a quick and economical manner, we advise decision makers from the chemical and pharmaceutical industry to consider our high-performance dryers of the TTR series.

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  • Drying pellets

    Who turns his back on proper air conditioning for production and storage facilities risks serious damage to the product. This is also true for the manufacturing of pellets. The biofuel is particularly susceptible to excessive humidity values. For the untreated raw wood withdraws the humidity from the air and absorbs it. With devastating consequences for both the customer and the manufacturer:...

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  • Dehumidification in hotels

    A suitable room climate is a prerequisite for the well-being of hotel guests. If the air in the room is too warm or humid, it appears to be stale and muggy. Often damages appear at the building structure and interior within a short period of time. Wallpaper will be dotted with mould stains, curtains and clothes as well as linen become damp and musty and – if it comes to the worst – mildew runs...

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  • Dehumidification in indoor ice-skating rinks

    Due to the difference in temperature between air and the icy surface, condensation inevitably forms in every ice rink – especially when humid air keeps flowing in from outside through the refrigeration system. The solution against dripping water on the ice and against damage to property constitutes a dehumidifier. It prevents condensation in the offing.

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  • Mobile devices for sanitary, heating and ventilation engineers

    Many sanitary, heating and ventilation engineers use the mobile devices from the Trotec Group. Here sanitary, heating and ventilation engineers find everything they regularly need for their daily business to bridge the downtimes of stationary installations – all from a single source: mobile heating devices and central heating units, mobile air handling units or cooling systems right down to...

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  • Dehumidification after restoration work

    With an extensive reconstruction flats and houses are being polished up so as to quickly attract potential buyers. Estate agents rely on this service for a better marketability. But home builders also very much appreciate it when their own four walls are in immaculate condition before they move in. The future inhabitants’ thrill of anticipation increases along with the progress in construction...

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  • Dehumidification in cinema halls

    A cinema audience essentially wants one thing: to unwind and get away from the daily routine by succumbing to a world of fiction. Loud voices and unwelcome sources of light can be just as annoying as an inappropriately tempered auditorium and a poor air quality. Precisely because it is difficult to properly ventilate cinema facilities, they are usually equipped with powerful air-conditioning...

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  • Humidity regulation in gas distribution stations

    The consequences of condensation water and high humidity levels in gas distribution stations are well-known – and expensive: corrosion of pipes, stairways and other metal parts as well as moisture-related failures of the control electronics may entail incalculable costs. If you want to prevent this from the outset, investing in a professional dehumidification system pays off.

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  • Humidity regulation in gas turbine power stations

    Gas turbine power stations significantly contribute to the coverage of short-term peak loads. A sophisticated humidity regulation helps to prevent the breakdown of individual gas turbines due to corrosion and problems with the electronics.

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  • Offshore: Preventing corrosion

    Corrosion of metal parts in the nacelle of a wind turbine or in the tower itself as well as electrical failure are among the most typical humidity damages in offshore surroundings. They cause substantial additional costs as they increase the expense for maintenance and repair and may lead to operational downtimes. Plus, they reduce the turbine's life. In this case, strategically positioned...

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  • Dehumidification in bridges

    Inside bridges, steal beams, electric lines and technical rooms are subject to high humidity. For decades, it has now proven an efficient alternative to high-maintenance anti-rust paint to instead use dehumidifiers to keep bridges dry on the inside. Trotec desiccant dehumidifier of different capacities are used for dehumidification.

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  • Humidity regulation in the field of battery production

    Extremely low humidity values, or in other words, an extremely low dew point are indispensable for the production of innovative and environmentally friendly batteries, so as to achieve an optimum product yield and product quality and furthermore ensure a long service life taking all required safety precautions into consideration. Practice-proven dehumidification solutions from Trotec protect...

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