The Challenge
A food processing facility experienced batch rejections for moisture-related failures — texture degradation, premature packaging condensation, and in two cases, product moisture content above specification. The quality team investigated raw materials, storage conditions, processing equipment. The compressed air supply was not tested.
What Became Visible
Continuous dew point monitoring at the packaging line air inlet revealed that air was arriving at −8°C dew point on approximately 40% of operating days. The specification was −20°C. One of two air dryers had failed and was not being detected. The other dryer was undersized for summer peak demand loads and was becoming overwhelmed during high-humidity periods.
What Changed
Continuous dew point monitoring at three critical points: after each dryer and at the packaging line inlet. Automatic alerts when dew point exceeded −20°C.
How it worked: The failed dryer was identified and repaired. The undersized dryer was replaced with correct capacity. Most importantly, monitoring was retained as permanent quality control instrumentation — no longer a diagnostic tool but an operational requirement. Air quality became as measurable and controllable as product quality.
Results
consistently achieved
and corrected
compressed air quality
Compressed air is a production input, not a utility. When air contacts product or product-contact surfaces, its quality becomes part of the product specification. Quality failures attributed to process equipment, water chemistry, or operator technique are often air quality problems. Continuous dew point monitoring at the point of use is not sophistication — it's a basic quality requirement for any facility using compressed air in production.
Operational Reality
This is a category of problem that is often invisible until failures appear. Once visible, the fix is straightforward. Once monitored, the failure risk disappears.