23.100.60 - Filters, seals and contamination of fluids

This document specifies procedures for the following: a) primary particle-sizing calibration for particle sizes 1 µm(c) and larger, sensor resolution and counting performance of liquid automatic particle counters that are capable of analysing bottle samples; b) secondary particle-sizing calibration using suspensions verified with a primary calibrated APC; c) establishing acceptable operation and performance limits; d) verifying particle sensor performance using a test dust; e) determining coinci...view more

This document explains the use of the two acceptable methods of reporting particle size, µm(c) and µm(b), that are defined in ISO 11171:2016. It also explains the reasons for the existence of two alternative size reporting methods and its implications with respect to particle count and filter Beta Ratio data.

This document specifies a method for the determination of the particulate contamination level using the light extinction technique (also known as light blockage or light obscuration) either online or offline in containers. It also defines procedures for calibrating the instruments and verifying their correct operation both in the laboratory and in service. In general, the techniques described in this document are suitable for monitoring: — the general cleanliness level in hydraulic systems, — th...view more

This document specifies a bubble-point test method applicable to filter elements used in hydraulic fluid power systems. It can be used both to verify the fabrication integrity of a filter element (by checking the absence of bubbles) and to permit the localization of the largest pore of the filter element by determining the first bubble point. NOTE Verification of fabrication integrity is used to define the acceptability of the filter elements for further use or testing. The first bubble point is...view more

This document establishes methods to: — validate equipment used to prepare secondary calibration suspensions for automatic particle counters; — perform online secondary calibration of automatic particle counters; — match two or more online particle counters, i.e. to count the same number of particles at a given size by two APCs associated on line; — validate online particle counting systems with and without online dilution as used, for example, to measure the filtration efficiency of a hydraulic...view more

ISO 5782-1:2017 specifies which characteristics of compressed air filters are to be included in the supplier's literature. It also specifies product-marking requirements. ISO 5782-1:2017 is applicable to compressed air filters, constructed from light alloys (aluminium, etc.), zinc diecast alloys, brass, steel and plastic, with a rated pressure of up to 1 600 kPa (16 bar) and a maximum temperature of 80 °C, designed to remove solid and liquid contaminants from compressed air by mechanical means

ISO 18237:2017 specifies: - test equipment, test circuit and a procedure for the evaluation of the water separation capabilities of a dehydrator; - a procedure for preparing test fluid; - a procedure for obtaining and analysing the test fluid samples. ISO 18237:2017 applies only to those dehydration units that can dry a hydraulic fluid to less than 20 % of the hydraulic fluid's water saturation level at the test temperature. ISO 18237:2017 provides a test procedure that yields reproducible resul...view more

ISO 12669 specifies a method of determining the required cleanliness level of a hydraulic system, that is, the most appropriate fluid cleanliness level for an operating hydraulic system based upon the individual requirements of that system. It is applicable to systems where the level of fluid cleanliness is expressed in accordance with ISO 4406, although conversion to other contamination coding systems is possible. It is applicable to both high and low pressure fluid power systems and also lubri...view more

This document specifies dimensions and performance requirements for external hex and internal hex
port plugs for use with ISO 6149-1 ports.
Port plugs in accordance with this document can be used at working pressures up to 63 MPa (630 bar1)).
The permissible working pressure depends upon the plug end size, materials, design, working
conditions, application, etc.
Conformance to the dimensional information in this document does not guarantee rated performance.
Each manufacturer is expected t...view more

ISO 4406:2017 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 3668:2017 specifies a procedure for evaluating differential pressure versus flow characteristics of hydraulic filters and constitutes a basis for agreement between the filter manufacturer and user. It also specifies a method for measurement of the differential pressure generated at different flow rates and viscosities by the relevant parts of a filter assembly, spin-on and any valves contained within the filter which are in the flow stream. The typical types of filter to be tested are as fol...view more

ISO 11171:2016 specifies procedures for the following: a) primary particle-sizing calibration, sensor resolution and counting performance of automatic particle counters (APCs) for liquids capable of analysing bottle samples; b) secondary particle-sizing calibration using suspensions verified with a primary calibrated APC; c) establishing acceptable operation and performance limits; d) verifying particle sensor performance using a truncated test dust; e) determining coincidence and flow rate limi...view more

ISO 12829:2016 specifies methods for verifying the rated fatigue life and the rated static burst pressure of the pressure-containing envelope (i.e. the filter housing) of a spin-on hydraulic filter with a disposable filter element and a finite life. Because the service life of housings for these types of filters is relatively short, a rated fatigue life of 100 000 cycles is judged sufficient for typical industrial applications.

ISO 3601-2:2016 specifies the housing (gland) dimensions for class A O-rings for general industrial applications conforming to ISO 3601-1, as well as housing dimensions for class B O-rings used on selected metric-dimensioned hardware, e.g. fluid power cylinder bores and piston rods. These O-rings are for use in general hydraulic and pneumatic applications without and with anti-extrusion rings (back-up rings). The dimensions of the O-rings (d1 and d2), size codes (SC) and tolerances conform to IS...view more

This Technical Report discusses the impact of changes in International Standards for particle counting,
contamination control, and filter testing.
Liquid automatic particle counters (APCs) are used in monitoring contamination levels in hydraulic
fluids, to establish component and assembly cleanliness level specifications, and in determining filter
efficiencies and particle size ratings. As a result of the replacement of ISO 4402 with ISO 11171 (APC
calibration), the replacement of ISO 4572 ...view more

This International Standard specifies a method for verifying the end load rating of a hydraulic fluid
power filter element. It also verifies the ability of a hydraulic fluid power filter element to withstand the
designated axial loading imposed by installation and use.