What does the ISO Code Number indicate about particle counts?

The ISO Code Number is a standardized classification system used to denote the cleanliness of hydraulic fluids and lubricating oils based on the size range and concentration of particles present in the fluid. Specifically, the ISO Code indicates the number of particles present per milliliter within specific size ranges. This classification allows for a clear understanding of the fluid's contamination level, which is crucial for maintaining the reliability and performance of machinery and equipment.

The ISO Code is part of the ISO 4406 standard, which defines how to quantify contamination by particles and provides a consistent method for measuring and communicating the cleanliness of fluids. By focusing on particle size and count, users can identify potential issues related to wear and tear, filtration effectiveness, and overall fluid condition.

Understanding the ISO Code Number helps engineers and reliability practitioners make informed decisions regarding maintenance, filtration, and the scheduling of fluid changes to ensure optimal performance and longevity of equipment.