Contamination Target Calculator

Determine target cleanliness level by component sensitivity per ISO 4406

Input Parameters

Results

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Target ISO Code
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NAS Class
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Filter Rating
µm
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Min Beta Ratio

Reference

ISO 4406: 3-number code (4/6/14 µm particle counts) Servo valves need cleanest fluid (16/14/11) Beta ratio: β₁₀ ≥ 200 = 99.5% efficiency at 10 µm