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What NAS value of oil tells?

Updated: 12/20/2022
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12y ago

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NAS value is a standard adopted worldwide to grade the oil contamination, based on particle size. The standard tells how many particles of a particular size are present in that sample.

Higher the NAS value higher is the contamination (bigger particles). Hence the delicate sophisticated type of application like control valves allow oil of NAS value of 5 - 6.

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12y ago
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