An ISO-4406 cleanliness rating for fluids is expressed as three numbers, such as 17/15/10. The numbers, left to right, are codes for the approximate number of particles— contained in a very small ...

At Chevron, we talk a lot about the importance of lubricant cleanliness. And it’s important enough that it bears repeating: particle contamination is the No. 1 cause of lubricant-related mechanical ...

Optical particle counters (equipment here from Pacific Scientific), now with ISO standard calibrations, determine the condition of hydraulic oils used in injection machines and ensure comparability of ...