This International Standard specifies the code to be used in defining the quantity of solid particles in the fluid used in a given hydraulic fluid power system.
ISO 4406:1999 history
2021ISO 4406:2021 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
2017ISO 4406:2017 Hydraulic fluid power — Fluids — Method for coding level of contamination by solid particles
1999ISO 4406:1999 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
1987ISO 4406:1987 Hydraulic fluid power; Fluids; Method for coding level of contamination by solid particles