Compressed air filtration: the basics

Various type of industrial compressed air filters

Much like a fuel filter in a car is essential for smooth vehicle operation, compressed air filtration is essential for the proper functioning of your compressed air system.

Not only does filtration ensure that your air supply is free of impurities, it dramatically affects the reliability and efficiency of your compressed air system.

Here, we outline the importance of compressed air filtration and the important factors you should consider when determining your compressed air treatment requirements.

“Effective filtration protects your system, lowers energy costs, and extends compressor life.”

Filter for purifier

Protecting against contaminants

Unfiltered air contains millions of particles of dirt, water, oil and other contaminants, each of which can affect your compressed air system in different ways.

The solid particles found in atmospheric air (ambient air), such as dust, can clog valves, while water droplets can oxidise pipes, affect paintwork and damage components.

Oil particles can cause seals and cylinders to swell, and they can even have detrimental health effects, particularly if the application is for the food or medical industry.

Compressed air filtration is essential to mitigate the risks associated with these contaminants, which will reduce system downtime, increase efficiency and minimise maintenance and energy costs.

Key Takeaways

Filtration is Essential

Removes dirt, oil, water, and particles that damage air systems.

Tailored to Needs

Choose filters based on purity, flow, and pressure requirements.

Multiple Options Available

Pilot Air offers carbon, 0.01 micron, 1 micron, and 3 micron filters.

Efficiency Gains

Proper filtration reduces downtime, cuts energy costs, and extends equipment life.

Manometer, Pressure gauge

Purity, pressure and flow

There are three important aspects that work together to deliver high quality compressed air, which you should consider when deciding your compressed air filtration requirements: purity, pressure and flow.

Compressed air purity is the quality of the air, in regard to the presence of water, oil and other particles. Your level of compressed air purity will not only have consequences for the performance and efficiency of your system, but can have health and legal ramifications if it doesn’t meet the required level.

The flow (volume) and pressure of compressed air will largely be dependent on the compressed air system (with larger systems generally having larger flow rates and pressure). Optimal flow and pressure not only increase system efficiency, but reduce the costs associated with maintenance and energy consumption.

Traditional filters should be sized to handle the flow rate required, while a pressure gauge across the filter will allow you to monitor the build-up of contaminants. Some filter types will ensure the removal of dirt and water, while some remove oil.

Ensuring you understand your application and its challenges – as well as your compressed air filtration requirements – is essential if you are to enjoy the optimal purity, pressure and flow of your compressed air.

Different size of Air filtration

Pilot Air filtration products

Each of Pilot Air’s compressed air treatment and filtration systems is designed to suit varying degrees of filtration and size based on the flow of air in the application.

Activated carbon filter: for the elimination of oil vapours and odour. When installed after an (X) grade filter, it lowers the maximum contents of residual oil to 0.005 mg/m.

0.01 Micron Industrial Air Filter Series X: Oil removing filter capable of separating residual oil and extremely small particles down to 0.01 micron. Maximum content of residual oil 0.01 mg/m³. It produces air technically free from oil.

1 Micron Industrial Air Filter Series S: Filter capable of separating particles down to 1 micron, liquid and oil included. Maximum contents of residual oil 0.1 mg/m³.

3 Micron Industrial Air Filter Series P: Filter capable of separating emulsion and particles down to 3 microns.

QS-01 and QS-02 Compressed Air Filters: Separates moisture out of the compressed air flow with cyclonic action. With 35L/sec max. flow rate, ½” BSP inlet and outlet ports, it is suitable as a workshop filter or industrial pre-filter filter.

“Pilot Air delivers filtration solutions built for Australia’s harsh conditions and trusted by Sydney industries.”

Extensive product range

Whether you are looking for a custom-built air compressor or a catalogue product, Pilot Air’s extensive offering of Australian made compressed air storage tanks offers a solution for all your needs, no matter the industry.

Our product range and large stock levels, combined with our comprehensive spare parts inventory, ensure we maintain your compressed air system’s reliability and efficiency while reducing whole-of-life operating costs.

Learn more about our compressed air products.

The Pilot Air Team

Our compressed air experts are the best in the business. Committed to outstanding service delivery, our team and network of over 50 specialist technicians are with you every step of the way.

Compressed Air Products

We have Australia’s most extensive range of air compressor solutions, from high-performance models to portable and compact units. We also manufacture the latest air storage, air treatment and air distribution solutions. We offer a complete inventory of spare parts and on or off-site servicing and maintenance and can customise a complete compressed air solution for any business. 

Best suited for industrial applications to meet the ever-changing demands of the industry.

Rotary Screw
Compressors

All the reliability of a Pilot Air product, in a quiet package.

Silent Air
Compressors

Tailored for trade, professional or industrial applications.

Reciprocating Air
Compressors

Horizontal and vertical air receivers to complete a compressed air system installation.

Compressed Air
Storage

100% pure oil-free air, designed for applications where air quality is critical.

Oil-Free Air
Compressors

A range of products that offer safe, clean air, free from impurities.

Compressed Air
Treatment

Ideal for clients with small, specialist compressed air requirements.

Compact Air
Compressors

Efficient and easy to install, with high-quality components.

Compressed Air
Distribution

Perfect for noise sensitive environments where air demands are constant.

Portable Air
Compressors

Perfect for noise sensitive environments where air demands are constant.

Portable Air
Compressors

Complete solutions, including horizontal and vertical air receivers.

Compressed Air
Storage

Ideal for clients with small, specialist compressed air requirements.

Compact Air
Compressors

Frequently Asked Questions

Why is compressed air filtration important for air systems in Australia?

Filtration protects your system by removing dirt, water, oil and other contaminants that can clog valves, cause corrosion, damage components or degrade product quality — especially in dusty, humid or coastal Australian environments.

How do I decide what purity, flow and pressure specifications I need in a filter?

You should evaluate the required purity (how clean the air must be), the flow (volume) and pressure your system demands, then pick filters that meet those specs without causing excessive pressure drop. Pilot Air outlines those trade-offs in their Purity, Pressure & Flow section.

What types of filters does Pilot Air offer and what contaminants do they target?

Pilot Air provides various filter grades including: activated carbon filters (for odour & oil vapour), 0.01 micron industrial filters (for ultra-fine oil & particles), 1 micron and 3 micron filters for larger particles/oil/emulsions. You can view all filter types under their Industrial Compressed Air Filtration range.

How does filtration affect the efficiency and longevity of compressed air systems?

Proper filtration reduces dirt accumulation, moisture damage, oil ingress and filter clogging, which helps maintain airflow, reduce energy loss, lower maintenance costs, and extend component life. Pilot Air notes these benefits in the “Protecting against contaminants” section of Compressed Air Filtration.

What local support and options can Pilot Air provide for filtration systems?

Pilot Air offers Australian-made compressed air treatment and filtration systems, a large spare parts inventory, custom-built solutions, and technical support based in Sydney to ensure your filtration system matches your local conditions. More on their product range and support under Compressed Air Treatment and Spare Parts pages.

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