Wednesday, 17 June 2026

Absolute vs nominal micron rating: which filter specification should you trust?

 If you've ever sought hydraulic filters or identified a filter for a system of fluid power You've probably come across two terms on a datasheet: nominal micron rating and absolute micron rating. Both describe the size of particles captured; they typically appear side-by-side and may appear at first glance similar. However, they're fundamentally different things, and using the wrong specification as a reference point could make your system more vulnerable than you thought.

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