Tag Archives: ISO Cleanliness

Particle Counting Cleanliness Codes

https://youtu.be/ux_uiDiYuVY Comparing ISO and NAS Particle Counting Codes Most laboratories utilize ISO cleanliness codes. However, we frequently receive requests about NASA cleanliness codes. ISO Cleanliness Codes ISO cleanliness codes are the most widely used international standard for representation of the level of particulate contamination in your industrial fluid and are typically presented in codes of…
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Understanding ISO Codes

Understanding ISO CodesThough particle counting is reported as an actual count of the number of particles (of a given size, per ml of fluid), most specifications and limits simply refer to ISO codes. The ISO codes, according to the ISO 4406:1999 standard, relate to only three different ranges of particles, ≥4 µm/≥6 µm/≥14 µm.It should…
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Causes of High Nitration

Causes of High Nitration Excessive aeration can lead to compression combustion of air molecules (microdieseling) causing thermal breakdown of oil molecules, which will increase the nitration value. In engine applications, early combustion caused by advanced timing will produce nitration by-products. These by-products form a slimy brown or reddish-brown residue. For specific information on other measured…
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Setting ISO Cleanliness Targets

Setting ISO Cleanliness Targets Part of a lubrication program involves establishing ISO cleanliness targets, whether for new lubricants, or for in-service machines. The two primary difficulties arise from finding a reputable source and trying to find an exact fit. A seemingly smaller concern, but one with greater ramifications, is defining the difference between a target…
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