Compressed Air Systems: Design, Install & Run Them Right

By Byron Raal, CAS Founder-Editor · Last updated 12 July 2026 · About the author

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A compressed air system in Australian industry comprises five subsystems: compression (rotary screw, piston, oil-free), treatment (dryer, filtration), storage (receiver tank per AS 1210:2010), distribution (ring main, aluminium or steel piping), and controls. Sizing follows ISO 1217 FAD methodology; air quality follows ISO 8573-1; pressure equipment follows AS/NZS 1200:2015 + AS/NZS 3788:2024 Amd 1:2025. Any receiver in the system also carries pressure vessel registration requirements that vary by state.

Energy flow Sankey diagram: only 10 to 15 per cent of compressor input energy does useful work, about 85 per cent leaves as heat, and up to 90 per cent of that heat is recoverable. — Where a compressor’s energy goes: 10 to 15 per cent becomes useful work, about 85 per cent leaves as heat, and up to 90 per cent of that heat is recoverable (US DOE Compressed Air Systems Sourcebook pp. 17, 30, 63). Illustrative. Source: Compressed Air Solutions, CC BY 4.0.

What does a complete compressed air system include?

Schematic anatomy of a compressed air system: compressor, receiver, particulate and coalescing filtration and dryer to the point of use. - by Compressed Air Solutions, licensed CC BY 4.0.

A complete industrial compressed air system is built from five core subsystems (compression, treatment, storage, distribution, and controls), realised through eight key components: the compressor (rotary screw, oil-free, piston, or VSD), the receiver tank, the dryer (refrigerated, desiccant, or membrane), the filtration train (coalescing, particulate, activated carbon), the distribution piping (aluminium, steel, or copper), the leak detection and energy monitoring layer, the condensate management system, and the compliance documentation set against AS, AS/NZS, and ISO standards. You can calculate what your leaks cost in about a minute.

Most compressed air waste is designed in before the compressor ever switches on. Electricity is 70 to 80 per cent of what a system costs you over its life, and the biggest leaks, pressure drops and downtime almost never start at the compressor. They start in the design decisions around it. Get the system right and you stop paying for that mistake every hour the plant runs.

This hub is for the facilities manager, maintenance lead or engineer who has to plan, design or commission a complete compressed air system in Australia. Whether you’re upgrading old infrastructure, chasing a chronic pressure drop, or speccing a new build, the money and the reliability are won or lost in how the components work together, not in which compressor you buy.

We deal with industrial and commercial systems: engineering workshops, manufacturing plants, food processing, mining, construction and automotive service. If you want portable or DIY gear, this isn’t the page for you.

The five parts of a compressed air system

Every properly designed system does five jobs: compression, air treatment, storage, distribution and controls. They work as one. Choke or fail any single part and the whole system pays for it.

Compression

The compressor is the energy source, but it’s only the start. Fixed displacement machines are simple and reliable. Variable displacement and variable speed drive (VSD) units track changing demand and stop burning electricity during the quiet hours. Which technology fits, screw, piston or centrifugal, comes down to your flow demand, your pressure, and your duty cycle. Don’t pick on the brochure alone.

Start with our guide to rotary screw compressors, or see all compression equipment and technologies.

Air treatment

Air leaves the compressor saturated with moisture and carrying oil residue and airborne particles. Leave it untreated and it corrodes your pipework, fouls your tools, and ruins sensitive processes. Treatment means dryers and filtration sitting close to the compressor outlet. Refrigerant dryers condense the water out; desiccant dryers adsorb it.

You stage filters to hit the ISO 8573-1 air quality class your application actually needs. A typical industrial train runs a 5 µm particulate pre-filter for bulk dirt and pipescale (consistent with ISO 8573-1 Class 4 to 5 particles), a 1 µm general-purpose coalescer that pulls oil aerosol carry-over down to roughly 0.5 mg/m³ (Class 3 oil), a 0.01 µm high-efficiency coalescer that polishes oil aerosol to about 0.01 mg/m³ (Class 1 oil), and an activated carbon adsorber that strips residual oil vapour and odour below 0.003 mg/m³ where food contact, breathing air or pharmaceutical manufacture demand it. Coalescing elements are usually rated 99.9 per cent or better at the stated pore size, but it varies by brand, so confirm the manufacturer’s rating against ISO 12500-1:2007 filter test methodology before you specify.

Filtration stage	Pore rating	Removes	ISO 8573-1 class typically achieved
Particulate pre-filter	5 µm	Bulk dirt, rust, pipescale	Class 4 to 5 particles
General-purpose coalescer	1 µm	Liquid water, bulk oil aerosol	Class 3 oil (≤1 mg/m³)
High-efficiency coalescer	0.01 µm	Sub-micron oil aerosol	Class 1 oil (≤0.01 mg/m³)
Activated carbon adsorber	Not pore-rated	Oil vapour, odour	Below 0.003 mg/m³ total oil

For sizing, technology choice and maintenance, read our air quality and drying guide.

Storage

Air receivers do two jobs: they smooth the pressure pulses coming off the compressor, and they hold air ready for short demand spikes so the compressor doesn’t have to react to every one. Undersize the storage, or skip it, and the compressor loads and unloads constantly, burning energy and wearing itself out. Oversize it and you’ve paid for footprint you don’t use.

Our receiver tank guide covers sizing, materials and compliance.

Distribution

Air runs from the compressor through steel, aluminium or plastic pipework to every point of use, and the material sets the corrosion path and the long-term bore condition, so weigh aluminium against steel piping before you commit the ring main. This is where most systems quietly bleed pressure. A ring main, a loop returning to the compressor outlet, holds pressure far better than a radial tree. Size your drop legs to the workstation. Put particle traps and drain valves at the low points so you’re not feeding condensate and muck into your tools.

Pressure at the point of use is always lower than at the compressor discharge. Budgeting that drop, rather than discovering it, is what keeps a system reliable.

Controls and monitoring

Modern systems use sequencers, pressure switches, variable speed drives and building management system (BMS) integration to run compressors efficiently and follow real demand. Load/unload controls cycle the compressor on and off. VSD controls modulate output continuously to match supply to demand. Tie it into facility energy management and you can shift the pressure band by production schedule instead of running flat out all day.

System design principles

Picking good components is the easy half. Performance and whole-of-life cost are decided by how you make those components work together.

Compressed air treatment train with refrigerated dryer, inline filter housings and condensate drain, compressed air system components

Size to demand, not to peak

Every design starts with a real picture of demand: peak flow (litres per second or cubic metres per minute), system pressure (bar gauge), and demand profile (steady, intermittent or variable). Size the compressor for a one-off peak and you pay for that headroom in electricity every hour of the year. Size it short and you’ll get pressure problems the moment demand spikes. Measure first.

Our air compressor sizing guide walks through demand measurement, duty cycle analysis and selection.

Manage the pressure band

System pressure isn’t one number. The compressor discharges at a set point, say 8.5 bar gauge, and that pressure falls as air moves through treatment, storage and distribution. Point-of-use pressure is always lower. Know the acceptable band at each point, budget the drop to get there, and you’ve solved most reliability problems before they happen.

Too much pressure at the compressor wastes energy. Too little at the point of use starves your tools. The balance comes from knowing what each location actually needs, not from cranking the set point up to be safe.

Overhead compressed air ring main with drop legs in a manufacturing facility, compressed air distribution system

Energy and lifecycle cost

Electricity is 70 to 80 per cent of the total cost of owning a compressed air system over its life. A fixed displacement compressor running flat out against a wide pressure band is one of the least efficient machines on any site. A well-designed system using VSD or sequenced load-share typically cuts compressor energy by about 20 to 35 per cent against that baseline, with the savings coming from demand profile, pressure-band tuning, and killing blow-off losses during unload. That range is consistent with energy assessments run under ISO 11011:2013 Compressed air, energy efficiency, assessment and with manufacturer data. What you actually save on your site should be measured against a baseline from metered demand logging, not promised off a spec sheet. If you want the numbers for your own site first, an independent compressed air energy audit is the place to start.

Heat recovery captures waste heat off the compressor and reuses it for space or process heating, taking more cost out of the system over its life.

Plan for uptime

Industrial sites can’t sit through compressed air downtime. One compressor fails, production stops. Larger facilities run N+1: two compressors in lead-lag, where the lead handles steady demand and the lag kicks in if pressure drops or the lead needs servicing. You keep running, and you can do planned maintenance without shutting the plant.

Smaller sites can cover extended outages with standby generation or a temporary portable air compressor.

Installation and commissioning

Installation and commissioning are where the design either becomes real or quietly falls apart. Plan for compressor placement (noise, heat, vibration isolation), foundations, intake air quality and utilities, pipe layout and support, maintenance access, and electrical supply. Commissioning means pressure testing, air quality verification, control calibration and operator training.

Installation mistakes are expensive to undo. Put the compressor in the wrong spot or skip the piping design and you lock in a pressure-drop problem for the life of the system.

Our air compressor installation guide covers planning, execution, compliance and commissioning in detail.

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Australian standards for compressed air systems

Compressed air systems sit under several standards and regulations covering safety, efficiency and performance. You need to know them to spec equipment, approve designs and stay compliant.

Standard	Scope	Relevance to System Design
AS 1210:2010	Pressure vessels	Air receivers and downstream storage tanks must meet pressure vessel requirements.
AS 4041:2006	Pressure piping	Pipework, fittings and joints must be designed and installed to this standard. Specifies material grades, joint methods, and pressure ratings.
AS/NZS 1200:2015	Pressure equipment	Covers classification, design, manufacture and testing of pressure equipment. Applies to the pressure-equipment components of these systems.
AS/NZS 3000:2018/Amdt 3:2023	Electrical installations	Compressor motor and control wiring must comply. Relevant to isolated earth systems common in manufacturing.
AS/NZS 3788:2024 Amd 1:2025	In-service inspection of pressure equipment	Defines inspection intervals, condition assessment methods, and record-keeping requirements for receivers, vessels and piping in active service.
AS/NZS 4024 series	Safety of industrial machinery	Applies to compressor design, guards and emergency controls.
AS 4343:2014	Pressure equipment hazard levels	Classifies pressure equipment by hazard level (A through E) based on pressure, volume and fluid type. The hazard level then drives design and item registration, AS/NZS 3788 inspection cadence, and state WHS notification requirements.

Gear from reputable Australian suppliers is usually built to these standards already. If you’re importing compressors or refurbishing an older system, verify compliance before you install.

Authoritative guidance is available from Standards Australia and Safe Work Australia.

Industry applications

Compressed air runs across most Australian industry, and every sector pushes a different demand pattern, air quality and pressure.

Manufacturing

Manufacturing plants run compressed air to power hand tools, actuate pneumatic machinery, drive air presses and conveyors, and control robotic assembly. The system has to hold up through continuous shifts and absorb production demand spikes. Larger plants often split high-pressure circuits for heavy presses from lower-pressure circuits for pneumatic controls.

More on compressed air for manufacturing.

Food processing

Food and beverage has strict air quality requirements, because compressed air touches product across conveying, packaging and cleaning. Treatment isn’t optional. Water ingress means corrosion and contamination; oil residue is a food safety hazard. Size the drying and filtration generously.

Explore compressed air solutions for food processing.

Pharmaceutical

Pharmaceutical manufacturing runs some of the highest air quality requirements of any sector. Air used in cleanrooms, tablet coating and sterile packaging is commonly specified to ISO 8573-1:2010 purity classes for particles, moisture and oil, as verified in the site’s validation protocol. The design needs validated filtration trains, point-of-use monitoring and documented GMP compliance.

See compressed air systems for pharmaceutical manufacturing for purity class and validation guidance.

Medical and dental

Medical compressed air supplies breathing air, instrument drive air and surgical tool air in hospitals, dental surgeries and pathology labs. The medical air these systems produce has to meet the purity specified in AS 2568:2019, and it runs through a medical gas pipeline system designed and installed to AS 2896:2021, supplying oil-free, particle-free air at the defined pressure and flow each application needs. Redundancy and alarm monitoring are mandatory where a supply interruption is a direct patient safety risk.

Read about compressed air for medical and dental facilities.

Electronics and semiconductor

Electronics and semiconductor fabrication use compressed air for component cleaning, pick-and-place pneumatics and cleanroom pressurisation. Microscopic contamination causes defects, so the air quality bar is extreme: systems typically specify ISO 8573-1:2010 Class 1.2.1 or better, with point-of-use filtration and continuous dew point monitoring.

Explore compressed air for electronics and semiconductor manufacturing.

Mining

Mining runs compressed air for pneumatic drilling, rock breakers, material handling and ventilation, in harsh conditions with high dust and moisture. Reliability is everything: a supply outage underground is extremely costly. Dual compressor configurations and robust air treatment are standard.

See compressed air systems for mining operations for environment-specific guidance.

Construction

Construction sites run portable and semi-permanent systems for nail guns, pneumatic drills, concrete breakers and dewatering. Conditions are temporary and rough, so the gear has to be mobile, quick to deploy and able to work in dust and damp.

More on compressed air equipment for construction.

Automotive

Automotive service centres, plants and parts suppliers lean on compressed air heavily: impact wrenches and hand tools, pneumatic lifts and hoists, painting and fastening. Uptime keeps a service centre running, and the design has to handle sharp demand swings between quiet periods and full-capacity work.

Visit compressed air systems for automotive service and manufacturing.

Timber processing

Timber mills and wood processing run compressed air for pneumatic clamping, log debarking, dust extraction assist and kiln control actuators. Green timber throws off high dust and moisture, which lands hard on intake filtration and air treatment. The system has to keep going where fine sawdust and high humidity never let up.

See compressed air for timber processing and sawmills.

Packaging

Packaging lines run compressed air for bottle blowing, carton forming, labelling, shrink wrapping and palletising. Demand is high-volume and continuous through a run, with sharp ramp-ups at shift start. Air quality varies: non-contact work tolerates general-purpose air, while direct-contact food packaging needs ISO 8573-1:2010 compliant filtration and drying.

Explore compressed air for packaging operations.

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Frequently Asked Questions

How much pressure do I actually need in my compressed air system?

System pressure should be the minimum required to power your most demanding application plus a safety margin to account for pressure drop during transmission. Most industrial facilities operate at 6.5 to 8.5 bar gauge. Specifying pressure higher than necessary wastes electricity and accelerates component wear. Conversely, pressure too low will starve tools and processes. Your compressed air supplier can assess your actual pressure requirements during the system design phase.

What causes pressure drop in compressed air systems?

Pressure drops as air travels through pipes, filters, dryers and fittings due to friction and turbulence. Long pipe runs with poor sizing, excessive filter restriction, and poorly designed distribution networks are common culprits. A well-designed system keeps total pressure drop below 0.3 bar (roughly 4 per cent of compressor outlet pressure). Poorly maintained systems with undersized piping, clogged filters and leaking fittings can lose 0.5 to 1.0 bar (7 to 14 per cent), which represents significant wasted energy. Proper pipeline sizing and strategic storage receiver placement minimise this loss.

How often should I drain my air receivers and condensate traps?

Manual drains should be opened daily at the end of each operational shift to remove accumulated water and oil residue. Automated drain valves can reduce labour but require regular inspection. The frequency depends on your air quality, ambient humidity and operating hours. Condensate accumulation is a common source of corrosion and tool failure, so do not neglect this maintenance task.

What is the difference between refrigerant and desiccant air dryers?

Refrigerant dryers cool compressed air to condense and separate water, like a household air conditioner. They are efficient and low-cost but cannot achieve very low dew points. Desiccant dryers use a chemical adsorbent material to remove water directly. They achieve much lower dew points, essential for sensitive applications and cold storage facilities. Your application’s air quality requirement determines which is appropriate.

Should I use VSD compressors on my compressed air system?

Variable speed drive compressors modulate their output to match real-time facility demand, reducing idle energy waste. They are particularly effective where demand is intermittent or highly variable. Fixed speed compressors are simpler and cheaper but cycle on and off repeatedly under variable demand, wasting electricity. For most modern systems, VSD technology offers compelling lifecycle cost savings despite higher upfront cost.

What is an N+1 redundancy configuration and why does it matter?

N+1 means running two compressors where one has the capacity to supply the facility alone (N = one), with the second unit standing ready (plus one). If the lead compressor fails, the lag unit automatically takes over, maintaining uptime. This configuration is standard in manufacturing plants, food processing, and other facilities where downtime is extremely costly. Single-compressor systems have no redundancy and will suffer production shutdown if the compressor fails.

General information disclaimer. The information on this page is general in nature and provided for educational purposes only. It is not engineering, safety, or professional advice, and it does not account for the specifics of your site, equipment, or duty. Compressed air system design, pressure equipment selection, and regulatory compliance must be confirmed with a qualified engineer and the relevant work health and safety regulator before you act. Compressed Air Solutions is a publisher and referral service, not a licensed engineering practice, and accepts no liability for decisions made on the basis of this content. Verify all figures, standards references, and regulatory requirements against current primary sources.

Related: The Hidden Cost of Compressed Air Leaks in Australian Industry (2026) models what leaks cost Australian manufacturing nationally.