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Save costs and resources with adsorber filters

13.12.2023

HANSA-FLEX adsorber filters make a major contribution to increasing the efficiency of your hydraulic machines and systems. In this article we explain their most important advantages and functions.

In hydraulic systems, contamination by water and dirt particles leads to premature wear on components, unnecessarily frequent fluid changes and unscheduled downtimes. Adsorber filters effectively counteract these costly and resource-consuming effects. This means they make an important contribution to greater sustainability, conservation of resources and energy efficiency.

Why should you use HANSA‑FLEX adsorber filters?

1. HANSA‑FLEX adsorber filters are a simple solution for extending maintenance intervals and the service life of machines and systems. They remove moisture from the ambient air, thus protecting against corrosion damage and helping to maintain the quality of operating media such as transmission oil and hydraulic oil. 

2. The use of adsorber filters eliminates the need for air conditioning to prevent the build-up of condensation in operating environments. 

3. Refillable series are designed in such a way that only those components that have actually reached the end of their product life need to be replaced and recycled.  Produktlebenszyklus erreicht haben.

Adsorber filters are suitable for many areas of application

Adsorber filters for hydraulic power packs and transmission systems prevent corrosion and protect the hydraulic oil from contamination by water and dirt particles, thus increasing the service life of the system and the oil.

Tank ventilation dryers protect hygroscopic substances in storage tanks from contact with humidity, and prevent moisture damage to the tank itself. They ensure that the quality of the stored media is maintained and protect hygroscopic substances such as isocyanate, oils and biological fuels in drums and IBCs in particular from coming into contact with moisture.

Adsorber filters protect transformers from hydrolysis of the cellulose paper in the transformer, and thus from a reduction in the degree of polymerisation by effectively drying and filtering the intake of moist air.

Contacts in switch cabinets, corrosion-prone housings and moisture-sensitive goods are protected by adsorbers against contact with moisture in the air.

Adsorber filters protect biodegradable and water-sensitive bio oils in hydraulic tanks from contamination by water. Mobile machines can consequently be operated with more environmentally friendly bio oils without any difficulty.

Inline adsorbers are able to dry process air at up to 10 bar (145 psi) and filter out pollutants. This significantly increases the service life of a system, as both corrosion and maintenance work are eliminated.

How do HANSA‑FLEX adsorber filters work?

HANSA‑FLEX adsorber filters are filled with hydrophilic silica gel. It attracts moisture, for example from the ambient air, but does not soak it up (absorption), but instead binds it to its surface (adsorption). Due to its high porosity, the granulate has a large inner surface area of up to 800 m²/g. This enables it to bind a very large amount of moisture. Silica gel is not a substance that is hazardous to health or the environment.

How adsorber filters work in practice

1. The adsorber can be mounted on the hydraulic unit, for example. The ambient air is saturated with moisture. 

2. If hydraulic oil is removed from the tank, the oil level drops and the pressure is equalised by the incoming air. The adsorber captures moisture from this incoming air. The relative humidity of the air is then only 2 % RH. 

3. When the hydraulic oil is pumped back into the tank, the oil level rises and the pressure is equalised by the escaping dry air. 

4. As the air inside the system always remains dry, there is no condensation in the hydraulic unit, even if the ambient air falls below the dew point, and full performance is maintained.

Do you have any questions about adsorber filters? Simply get in touch with us! We'll be happy to help and advise you.

Learn more

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