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
Air treatment units A1. Simple air filtration at 5 um. 1" filter design with 7,000 l/min air flow. Semi-automatic condensate discharge in the flask.
Air treatment units A1. Air lubrication for pneumatic tools and automation technology. Oil in the air extends the life of pneumatic components. Lubricator design 1" with air...
The filter cartridge with filtering capability is suitable for the exchange of A1 air treatment units. The 5 um - 1" version can filter 7,000 l/min of air compressed to a...
HFPA sterile cartridge filter with G1 1/4" connection thread for use in high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 50 bar,...
HFPA activated carbon filter with G1 1/4" connection thread for use in high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 50 bar,...
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 7,000 l/min. Operating...
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 filter cartridge PFI1 for filter with filtration capacity up to 1 um and working pressure 16 bar. Operating temperature up to 150°C. Made of stainless steel strainer.
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 filter cartridge PFM for filter with filtration capacity up to 0,1 um and working pressure 16 bar. Operating temperature up to 150°C. Made of borosilicate microfibers.
Replacement filter cartridge PFN25 for filter with filtration capacity up to 25 um and working pressure 16 bar. Operating temperature up to 150°C. Made of stainless steel strainer.
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.
HFPM microfilter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.01 um. Maximum working pressure up to 50 bar,...
PFM microfilter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 0.1 um. Maximum working pressure is 16 bar, maximum...
PFS microfilter with G1 1/4" 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 G1 1/4" 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 DN32 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 G1 1/4" 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 DN32 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 DN32 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 DN32 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 G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 20 um. Maximum working pressure up to 50 bar,...
PFI pre-filter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure is 16 bar, maximum flow...
Welded PFW pre-filter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure is 16 bar,...
The SPFN25 pre-filter with G1 1/4" connection thread is designed for highly efficient filtration of compressed air, process air and industrial gases. Filtration capacity up to...
The SPFN5 pre-filter with G1 1/4" connection thread is designed for highly efficient filtration of compressed air, process air and industrial gases. Filtration capacity up to 5...
Pre-filter WFITI1 with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 1 um. Maximum working pressure up to 16 bar,...
WFITN pre-filter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 25 um. Maximum working pressure up to 16 bar,...
Prefilter WFITN5 with G1 1/4" 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 G1 1/4" connection thread for high efficiency filtration of compressed air, process air and industrial gases. Filtration capacity less than 0.01 um...
Sterile pre-filter SPFI1 with G1 1/4" connection thread for high efficiency filtration of compressed air, process air and industrial gases. Filtration capacity up to 1 um....
PFN25 screen filter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 25 um. Maximum working pressure is 16 bar,...
PFN5 screen filter with G1 1/4" connection thread for use in areas with high corrosive environments. Filtration capacity up to 5 um. Maximum working pressure up to 16 bar,...