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
AAFS 1/2" microfilter to remove micro impurities up to 0.01 um from compressed air according to ISO 8573-1 class 1. Body with easily removable container and designed for a flow...
Dust filter AAFR in 1/2" design to remove dust impurities up to 1 um from compressed air according to ISO 8573-1 class 3. Body with easily removable container and designed for a...
AAFC cyclone separator in 1/2" design with a flow rate of 1,300 l/min for partial removal of condensate from compressed air. Here the flow changes to rotational and due to the...
Float-operated condensate drain valve for compressed air systems up to 20 bar. Version AOK20B for external mounting on the filter body with 1/2" thread.
AAFP basic filter in 1/2" design for removal of basic mechanical impurities up to 3 um from compressed air according to ISO 8573-1 class 6. Body with easily removable container...
Float valve for condensate discharge from compressed air system working on float principle. Version AOK16B for internal mounting of filter vessels using 1/2" thread.
Electronic timed condensate drain for compressed air systems up to 50 bar, operating on a time switching valve. External mounting on the filter body with 1/2" thread. Simple...
Condensing compressed air dryer for dew point +5°C. Maximum inlet pressure is 13 bar with a flow rate of up to 35 m³/hr (583 l/min) and connection via external thread G 1/2"....
AAFM 1/2" pre-filter for removing fine impurities up to 0.1 um from compressed air according to ISO 8573-1 class 2. Body with easily removable container and designed for a flow...
Prefilter for compressed air from Hankison NGF series of HF type according to ISO. Filter size F04 with 1/2" female thread connection. The filter is equipped with a clogging...
Hankison 's NGF series SF type basic ISO filter for compressed air. Filter size F04 with 1/2" female thread connection. The filter is equipped with a clogging indicator and an...
Hankison 's NGF series NGF type PF basic ISO compressed air filtration. Filter size F04 with 1/2" female thread connection. The filter is equipped with a clogging indicator and...
Removes mechanical dirt up to 0.1 um and oil according to ISO 8573-1 class 2. Connection by internal pipe threads 1/2". The design allows a flow rate of up to 1187 l/min....
Removes mechanical contaminants up to 1 um in size according to ISO 8573-1 class 3. Connection by internal pipe threads 1/2". The design allows a flow rate of up to 1187 l/min....
Removes mechanical dirt up to 0.01 um and oil according to ISO 8573-1 class 1. Connection by internal pipe threads 1/2". The design allows a flow rate of up to 1187 l/min....
AAFA activated carbon filter in 1/2" version for absorption of residual oil, oil vapours and aerosols with < 0,005 mg/m3 from compressed air according to ISO 8573-1 class 1....
Adsorption filter with activated carbon AAFA2 in 1/2" version for absorption of residual oil, oil vapours and aerosols with < 0,005 mg/m3 from compressed air according to ISO...
The WDF-70 condensing air dryer provides efficient moisture removal from compressed air with a flow rate of 70 m³/h (1,166 l/min) and a pressure dew point of +3 °C. Thanks to...
The WDF-53 condensing air dryer efficiently removes moisture at a flow rate of 53 m³/h (883 l/min) and reaches a dew point of +3 °C. Integrated 1 µm and 0.01 µm filters ensure...
Electronic IEDs are primarily designed to drain condensed water from filter vessels. Equipped with LED indicator and test button. Operating temperature +1,5 °C to +65 °C,...
The simplest way to drain condensate from pressure vessels and filter vessels. Connection by thread, control of the firing by a rotary pin.
Electronic stainless steel timed condensate drain from compressed air system up to 16 bar, working on time switching valve. External mounting on the filter body with 1/2"...
Electronic condensate drain from a compressed air system up to 16 bar, operating on a timed valve switching. External mounting on the filter body using a 1/2" thread. Simple...
Removes the coarsest mechanical dirt up to 15 um in size according to ISO 8573-1 class 7. Connection by internal pipe threads 1/2". Designed to allow flow rates up to 1187...
Cyclone separator CHP2 with threaded connection 1/2". It enables inexpensive and efficient removal of water and impurities from compressed air. Working pressure 250 bar, working...
The B-AIR breathable air filter with G1/2" connection thread is designed for a flawless supply of breathable atmosphere. The microfilter removes impurities down to 0.01 um....
Cyclone separator CHP1 with threaded connection 1/2". It enables inexpensive and efficient removal of water and impurities from compressed air. Working pressure 100 bar, working...
Stainless steel cyclone separator IHP1 with threaded connection 1/2". It enables inexpensive and efficient removal of water and impurities from compressed air. Working pressure...
Cyclone separator HFC-007 with 1/2" threaded connection. It enables inexpensive and effective removal of water and impurities from compressed air. Working pressure 50 bar,...
Cyclone separator CHP4 with threaded connection 1/2". It enables inexpensive and efficient removal of water and impurities from compressed air. Working pressure 400 bar, working...
Replacement cyclone separator body HFC-007 with threaded connection G1/2". It enables inexpensive and effective removal of water and impurities from compressed air. Working...
Stainless steel cyclone separator IHP4 with threaded connection 1/2". It enables inexpensive and efficient removal of water and impurities from compressed air. Working pressure...
Modular filtration system PPA-307C for clean air supply without air dryer in the ducts. Concept combining cyclone separator, pre-filter, microfilter, pressure regulator and 2...
MADRY-18 membrane dryer with compressed air flow up to 18 m³/hr up to 12 bar. Including 2 filters through the dryer and filter cartridge clogging indication. Designed to supply...
MADRY-24 membrane dryer with compressed air flow up to 24 m³/hr up to 12 bar. Including 2 filters through the dryer and filter cartridge clogging indication. Designed to supply...
Stainless steel cyclone separator IHP2 with threaded connection 1/2". It enables inexpensive and efficient removal of water and impurities from compressed air. Working pressure...
The replacement stainless steel filter cartridge IHPA-007V with activated carbon is used to absorb residual oil vapours and aerosols from compressed air to a level of 0.005...
Modular filtration system PPA-207C for clean air supply without air dryer in the ducts. Concept combining microfilter, cyclone separation, dryer, pressure regulator and quick...
PPA-307 modular filtration system for clean air supply with pre-set air dryer in ductwork. Concept combining microfilter, activated carbon, pressure regulator and 2 quick...
Removes mechanical dirt up to 0.01 um and oil according to ISO 8573-1 class 1. Connection by internal pipe threads 1/2". The design allows a flow rate of up to 1187 l/min....