AS ISO 8925:2021 pdf free.Earth-moving machinery – Diagnostic ports.
AS ISO 8925 defines the sizes, types and accessibility of diagnostic ports for use in measuring fluid temperature, pressure and flow, and to obtain fluid samples. It also sets out the requirements for accessibility to the port.
It applies to earth-moving machinery as defined in ISO 6165, and gives general guidelines for diagnostic port use.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 2860:1983, Earth-moving machinery — Minimum access dimensions.
ISO 4510-1:1987, Earth-moving machinery — Service tools — Part 1 Common maintenance and adjustment tools.
ISO 6149:1980, Fluid power systems and components — Metric ports — Dimensions and design. ISO 6165:1987, Earth-moving machinery — Basic types — Vocabulary.
3 Sizeandtypeofport
3.1 Temperature, pressure and sampling ports
The port size for measuring temperature and pressure, and to obtain fluid samples shall be an M14 x 1,51) port, in accordance with ISO 6149, attached to a tube of 8 mm outside diameter.
3.2 Flow measurement ports
Flow measurement ports shall be adequate for the flow to be measured. Generally, sizes below 25 mm tube should be as specified in 1]. and sizes equal to and above 25 mm should have either threaded or flanged port faces.
4 Application guidelines
4.1 Number and location of diagnostic ports
The number and location of diagnostic port checking points shall be determined by the manufacturer and shall be commensurate with the complexity of the system being checked and cost effectiveness.
The preferred location of diagnostic ports is in the component; however, they should be readily and safely accessible which might often require them to be located in a connecting line. The ports should be so located in the fluid stream as to minimize any conditions which could cause inaccuracies in readings: for fluid sampling, the ports should be located in a turbulent flow section of the system.AS ISO 8925 pdf download.
Tags: Earth-moving machinery
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