14-Point Energy-Saving Checklist for Compressed Air Systems
Up to 30% of compressed air is wasted annually, draining money from the bottom line and contributing to inefficiencies in industrial settings.
Fortunately, there are many effective solutions for reducing consumption, some of which can be implemented today.
This 14-point checklist, developed in collaboration with engineers and industry experts, is designed to help minimise compressed air wastage and ensure optimal system performance 24/7. It can be followed in chronological order on the factory floor or at any other compressed air installation site.
The checklist
1. System-wide leak detection
While machines are not running, listen for leaks throughout the whole system.
Even small leaks can add up to larger amounts of energy waste over time. Use your ears as a first line of defence. Consider using flow sensors for more sophisticated monitoring.
2. Auto-drain function
Are your filter and filter-regulator auto drains working correctly or leaking? Do the drains present audible leakage?
Faulty auto drains can lead to energy waste and inefficiency. They should remove condensate without wasting compressed air. If you hear constant hissing, the drain is likely malfunctioning and needs attention.
3. Lubricator performance
Is your compressed air line lubricator delivering the correct level of oil supply downstream?
Proper lubrication reduces friction and energy consumption. Too little oil increases wear and energy use, while too much wastes oil and can contaminate the system. Adjust based on equipment specifications and usage patterns.
4. Pressure gauge function
Ensure your pressure gauge is accurately monitoring output pressure and not malfunctioning.
Accurate pressure monitoring is essential for system efficiency. Faulty gauges can lead to over pressurisation, wasting energy. You can visually check for signs such as breakage, damage, or an indicator needle stuck on or below zero.
5. Filter element cleanliness
Verify your filter element is clean enough to prevent pressure drops.
Clean filters improve efficiency and reduce compressor workload. A dirty filter can cause pressure to drop, forcing the compressor to work harder. You can check this using the pressure drop indicator on your filter (where fitted) or otherwise look for any noticeable changes in equipment performance downstream.
6. Regulator optimisation
Is your regulator maintaining optimum pressure? Does the relief hole display a continuous audible leak when under pressure?
Proper regulation ensures efficient operation and prevents energy waste. Set pressure to the lowest acceptable level for your applications. Reducing pressure by 1 bar (14.5 psi) can save up to 7% in energy costs.
7. Upstream filter flow
Check upstream filters are not restricting airflow to valves.
Restricted flow can cause pressure drops and increased energy use. Ensure filters are properly sized for your system’s flow rate and check for any unusual restrictions or blockages. The performance of downstream equipment is a good indicator of appropriate filter sizing.
8. Bowl compliance and condition
Confirm your polycarbonate bowl complies with BS 6005:1997 and does not display any cracking or crazing.
Damaged bowls can lead to leaks and safety hazards. Regular visual inspections can prevent sudden failures. Replace any bowls showing signs of damage or degradation immediately.
9. Mechanical operator wear
Inspect mechanical operators, such as valve levers or rollers, for general wear and tear and replace them if necessary – failure can have dangerous consequences!
Well-maintained operators ensure smooth system operation and energy efficiency. Look for signs of excessive wear, unusual noises, or inconsistent operation.
10. Valve exhaust port leaks
Verify exhaust ports on valves do not present continuous audible leaks.
Valve leaks can cause significant air and energy loss. Listen for hissing sounds and feel for air movement around exhaust ports.
11. Cylinder cushioning function
If the cylinder model includes adjustable cushioning, is it functioning satisfactorily?
Proper cushioning optimises energy use and extends component life. It reduces impact forces at the end of strokes, saving energy and preventing damage. Adjust cushioning to achieve smooth operation without excessive slowdown.
12. Piston rod cleanliness
Remove debris buildup on the piston rod to prevent nose and wiper seal leaks.
Clean piston rods prevent seal leaks and maintain efficiency. Regular cleaning extends seal life and prevents contamination from entering the cylinder. Use appropriate cleaning materials to avoid damaging the rod surface.
13. Cylinder barrel contamination
Remove moisture or debris contamination (which could damage piston seals) from cylinder barrels
Contamination can lead to seal failure, causing air leaks and reduced efficiency. Implement proper air treatment upstream to prevent contamination, and clean barrels during scheduled maintenance to ensure smooth operation.
14. Piston rod condition
Inspect your piston rod for damage caused by material debris, rust, or corrosion.
Damaged rods can affect seal integrity and system efficiency. Look for scratches, pitting, or other surface imperfections. To extend rod life, consider using corrosion-resistant materials in harsh environments.
Wrapping up
This checklist is designed to be flexible and adaptable to your compressed air installation.
While some checks can be performed weekly or monthly, others should be added to more comprehensive quarterly or annual inspections.
The key is to build a robust, regular routine that works for your operation and allows you to track the impact of your energy-saving efforts.
Ready to take your energy savings further? Our energy-saving page offers additional strategies and techniques to enhance compressed air efficiency, minimise waste, and reduce operational costs.
Discover how small changes can lead to vast savings and dramatically improved system performance.