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Avoid moisture in the system

An air dryer (or its cartridge) removes moisture from the compressed air and prevents water from entering pipes, valves and cylinders. This prevents corrosion, icing and malfunctions – an important protection for the entire compressed air system.

Precise filter and drying performance

Cartridges for air dryers must be carefully manufactured with suitable threaded connections and a good fit so that they remain tight even under pressure differences. Only a precisely fitting cartridge ensures that the drying process runs efficiently and that the system is permanently protected.

Air dryer

What should you look out for when buying:

ACCURACY OF FIT OF THE CARTRIDGE

The cartridge connections and dimensions must fit exactly into the dryer housing.

DRYING CAPACITY

Select a cartridge that is suitable for the air volume and operating conditions of your system.

CHANGE FRIENDLINESS

Make sure that the cartridge can be replaced without tools so that it can be changed quickly and easily during maintenance.

Protecting the truck air brake
The air dryer cartridge is one of the most critical components in any modern truck equipped with an air brake system. As the system constantly draws in air from the environment, which always has a certain moisture content, the removal of this water vapor is essential. If the moisture were to enter the system unfiltered, there would be a risk of corrosion on valves, cylinders and lines. Even more critical in winter is icing: if the water freezes in sensitive areas, this can block or delay the function of the foot brake valve or the spring brake cylinders, which directly endangers road safety.

Function and technology: Molecular sieve and regeneration
The drying performance of the cartridge is achieved by the drying granulate it contains. In order for the air dryer to perform its task reliably, the granulate must chemically bind the water vapor and at the same time separate oil and dirt particles. The system works cyclically: during the drying phase, the moist air is passed through the cartridge; the cartridge is then cleaned by a portion of the purified, dried air in a regeneration phase. The drying capacity and the material quality of the cartridge are therefore directly decisive for the functionality and compliance with the maintenance intervals of the entire brake system.

Capacity and compatibility requirements
Particularly in the heavy-duty sector, where the air brake system also supplies the air suspension, gearshift and other auxiliary consumers, the cartridge must offer above-average volume performance and capacity. The selection of the correct cartridge must be precisely matched to the vehicle type and the air dryer system installed in the vehicle. This is the only way to guarantee trouble-free regeneration and ensure the longevity of the entire brake system. Regular replacement with an OE or original equipment manufacturer cartridge is the only way to ensure that the compressed air quality meets the high requirements of the sensitive control valves and that the expensive system components are protected from damage in the long term.

Air dryer guide: Everything about cartridges, replacement & maintenance

The air dryer removes moisture and impurities from the compressed air drawn in by the compressor. This prevents corrosion and freezing of the brake lines in winter.

As a rule, the cartridge should be replaced once a year, ideally before the start of the frost period to prevent moisture damage in winter.

Signs are water in the air reservoir (visible when draining), frequent blowing off of the pressure regulator or error messages in the brake system.

The granulate can no longer bind moisture. Water gets into the valves, which can lead to corrosion, icing and, in the worst case, total failure of the brake system.

Yes, premium cartridges (coalescing filters) have an integrated oil separator, which also filters out fine oil droplets and thus protects the sensitive solenoid valves.

No, the cartridge must match the thread and capacity of the installed air dryer housing exactly. Always check the OE number or manufacturer’s specifications.

It serves as a control: If water escapes during manual draining, this is a clear sign that the air dryer cartridge is saturated and must be replaced immediately.

In the regeneration phase, dry air flows in the opposite direction through the cartridge to transport the collected moisture to the outside via an outlet valve and reactivate the granulate.

Protect your compressed air system from moisture!

Correctly dimensioned cartridges ensure permanently dry air and protect sensitive components such as valves and cylinders. Order conveniently online and ensure that your system lasts reliably.