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Tag Archives: ISO Cleanliness

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Setting ISO Cleanliness Targets

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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Understanding ISO Codes

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
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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