ISO 4406:2021 PDF

Scope: This document 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 4406:2021 Referenced Document

ISO 11171 Hydraulic fluid power — Calibration of automatic particle counters for liquids*， 2022-03-18 Update
ISO 11500 Hydraulic fluid power — Determination of the particulate contamination level of a liquid sample by automatic particle counting using the light-extinction principle*， 2022-12-21 Update
ISO 21018-3 Hydraulic fluid power - Monitoring the level of particulate contamination of the fluid - Part 3: Use of the filter blockage technique
ISO 21018-4 Hydraulic fluid power — Monitoring the level of particulate contamination in the fluid — Part 4: Use of the light extinction technique
ISO 4407 Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using an optical microscope

2021 ISO 4406:2021 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
2017 ISO 4406:2017 Hydraulic fluid power — Fluids — Method for coding level of contamination by solid particles
1999 ISO 4406:1999 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles
1987 ISO 4406:1987 Hydraulic fluid power; Fluids; Method for coding level of contamination by solid particles