Left uncontrolled, contamination can bring production to a halt, costing valuable time and resources. A U.S. paper mill learned this firsthand when high ISO code readings in its lubricating oil system forced an unexpected shutdown. Despite changing filter elements daily, the contamination levels refused to drop until Donaldson Hy-Pro stepped in.
The Challenge
The mill’s oil system exceeded its target ISO 16/14/10 cleanliness level, preventing startup. Even changing filter elements daily wasn't enough to clean the system, and the team was running out of options.
The Solution
Donaldson Hy-Pro experts quickly identified the issue and provided high-efficiency 6-micron filter elements (β7(c) ≥ 4000) designed for quick cleanup at full system flow. The elements were shipped the same day and installed within hours of arrival. By utilizing an inline filtration approach, the system achieved measurable improvement almost immediately.
The Results
Within 24 hours of placing the order, the mill’s oil cleanliness dropped from an ISO 19/18/15 to below 16/14/10, meeting the target and allowing production to safely restart. The system maintained and even increased that cleanliness for months afterward, proving how the right filtration can restore fast.
Why It Matters
Every ISO point represents roughly double the number range of particles in your oil. Even small increases in contamination can accelerate wear and shorten component life. Choosing filters that deliver proven performance helps keep operations running and maintenance under control.
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See the complete data and timeline behind this 24-hour recovery.
Download the full case study to learn how Donaldson Hy-Pro can help facilities achieve clean oil and get back online faster.
About Donaldson Hy-Pro:
Donaldson Hy-Pro offers a wide range of hydraulic filtration solutions that can help you improve the performance of your machinery. Our filter elements are designed to combat dirt, water, and oxidation by-products, to help keep your systems running at peak performance.
If you're looking for a way to reduce filter expenses, improve oil cleanliness, and extend the life of your equipment, Donaldson Hy-Pro can help. Contact us today to learn more.