Compressed air leaks are the most common and most preventable energy loss in an industrial air system. Because air is invisible and the hiss is often masked by plant noise, leaks are easy to ignore until the energy bill arrives.
The cost of leaks
A single 3 mm hole at 7 bar wastes roughly the compressed air produced by 4 kW of compressor power running continuously. Across a network of couplings, valves and hoses, total leakage commonly reaches 20–30% of system output, and every leak adds directly to electricity cost.
How to find them
- Ultrasonic leak detector for fast, precise location in noisy plants
- Soapy water on joints and fittings for visible bubbles
- Pressure-decay test after hours to measure total leak rate
Building a repair programme
Tag every leak with its size and location, fix the large leaks first, and track the results by repeating the pressure-decay test. Replace worn quick couplings and aging hose, and make leak inspection part of routine maintenance rather than an annual exercise.