Filtration, regulation and treatment of compressed air
Treatment of compressed air is an absolutely indispensable part of every professional compressor system. Why is it so important? Compressed air naturally concentrates dust particles from its surroundings, oil residues from the unit, and a huge amount of moisture that condenses into water. This combination forms an aggressive emulsion that is extremely harmful to any equipment connected downstream of the compressor.
- ✅ Corrosion protection: Prevents rusting of pipes and clogging of expensive pneumatic tools.
- ✅ Failure prevention: Clean and dry air eliminates seizing of moving parts and valves in automated lines.
- ✅ Cost savings: Thanks to our comprehensive air treatment program, you will multiply the lifespan of the entire system and avoid costly servicing or unplanned production downtimes.
We offer you everything from air dryers and filters to pressure regulators, separators, and cyclone separators. Find out more about how to properly filter and treat air in the text below.
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Basic pillars of compressed air treatment
🔹 1. Drying (Moisture Removal)
Removes water from compressed air and eliminates condensation in the distribution system.
🔹 2. Filtration (Removal of solid particles)
Ensures top air purity precisely according to ISO 8573 standard.
🔹 3. Pressure regulation
Ensures safe and constant output pressure for every application.
🔹 4. Condensate and oil separation
Efficient and ecological separation of residual hazardous liquids.
ISO 8573-1 Standard: What Quality Do You Need?
How to determine the compressed air purity required for your application? The main guide is the international ISO 8573-1 standard. It divides the quality of produced air into seven classes (0 to 6). Each class has a strictly defined maximum content of solid particles, water, and oil.
While for general workshop air, class 4-4-5 (order: particles – water – oil) is usually sufficient, the pharmaceutical, food, or chemical industries require absolute purity. We discuss this topic in detail in the article: How to Filter Compressed Air.
Step-by-step air treatment
The correct sequence of components is key! Immediately after the compressor, it is best to install an air dryer supplemented with pre-filtration (e.g., a cyclone separator) to capture coarse condensate. This is followed by fine filtration, the micron purity of which depends on your needs (different for a paint shop, different for a dentist).
At the very end of the line, the air is regulated to the required pressure. Don't forget that filter cartridges and granules have a limited lifespan. For measuring wear in professional filters, we therefore use clogging indicators or differential pressure gauges.
Further expert articles from our advice center:
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Product sorting
List of products
HFPA activated carbon filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 50...
Replacement filter cartridge PFIW1 for filters (PF, HPF) with filtration capacity up to 1 um, working pressure up to 50 bar and flow rate up to 15 000 l/min. Operating...
The B-AIR breathable air filter with G1 1/2" connection thread is designed for a flawless supply of breathable air. The microfilter removes impurities down to 0.01 um. Working...
Replacement PFA filter cartridge for filter with filtration capacity up to 0,1 um and working pressure 16 bar. Operating temperature up to 150°C. Contains filtering activated...
Replacement PFI1 filter element for a filter with a filtration capability down to 1 µm and a working pressure of 16 bar. Working temperature up to 150°C. Made of stainless steel...
Replacement filter cartridge PFI20 for filter with filtration capacity up to 20 um and working pressure 16 bar. Operating temperature up to 150°C.
Replacement PFM filter element for a filter with a filtration capability down to 0.1 µm and a working pressure of 16 bar. Working temperature up to 150°C. Made of borosilicate...
Replacement PFN25 filter element for a filter with a filtration capability down to 25 µm and a working pressure of 16 bar. Working temperature up to 150°C. Made of stainless...
Replacement filter cartridge PFN5 for filter with filtration capacity up to 5 um and working pressure 16 bar. Operating temperature up to 150°C. Made of stainless steel strainer.
Replacement filter cartridge SFS-072V with filtration capacity less than 0.01 um including bacteria and microorganisms. Filters the smallest impurities from industrial gases,...
The SFS filter with DN40 flange connection is designed for highly efficient filtration of compressed air, process air and industrial gases. Filtration capacity less than 0.01 um...
Filter with sterile HFPA liner with G2" connection thread for use in high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 50 bar,...
HFPM microfilter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 50 bar, maximum...
PFM microfilter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.1 um. Maximum working pressure is 16 bar, maximum flow...
PFS microfilter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure is 16 bar, maximum...
SPFM microfilter with G2" connection thread for high efficiency filtration of compressed air, process air and industrial gases. Filtration capacity up to 0.01 um. Maximum...
WFITM microfilter with flange connection DN50 for use in areas with high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 16 bar,...
WFITM microfilter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 16 bar,...
Prefilter WFITI1 with flange connection DN50 for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure up to 16 bar, maximum...
Pre-filter WFITN25 with flange connection DN50 for use in areas with high corrosive environments. Filtration capacity up to 25 um. Maximum working pressure up to 16 bar,...
Pre-filter WFITN5 with flange connection DN50 for use in areas with high corrosive environments. Filtration capacity up to 5 um. Maximum working pressure up to 16 bar, maximum...
HFPI pre-filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 20 um. Maximum working pressure up to 50 bar, maximum...
PFI pre-filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure is 16 bar, maximum flow up...
Welded PFW pre-filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure is 16 bar, maximum...
The SPFN25 pre-filter with G2" connection thread is designed for highly efficient filtration of compressed air, process air and industrial gases. Filtration capacity up to 25...
The SPFN5 pre-filter with G2" connection thread is designed for highly efficient filtration of compressed air, process air and industrial gases. Filtration capacity up to 5 um....
Prefilter WFITI1 with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure up to 16 bar, maximum...
WFITN pre-filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 25 um. Maximum working pressure up to 16 bar, maximum...
Prefilter WFITN5 with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 5 um. Maximum working pressure up to 16 bar, maximum...
The WDF-930 condensing air dryer provides high-capacity compressed air drying with a flow rate of 930 m³/h (15,500 l/min) and a pressure dew point of +3 °C. Integrated filters...
PFN25 screen filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 25 um. Maximum working pressure is 16 bar, maximum...
PFN5 screen filter with G2" connection thread for use in areas with high corrosive environments. Filtration capacity up to 5 um. Maximum working pressure up to 16 bar, maximum...
SPFS sterile filter with G2" connection thread for highly efficient filtration of compressed air, process air and industrial gases. Filtration capacity less than 0.01 um...
Sterile pre-filter SPFI1 with G2" connection thread for high efficiency filtration of compressed air, process air and industrial gases. Filtration capacity up to 1 um. Maximum...