BS ISO 14085-4:2015
Current
The latest, up-to-date edition.
Aerospace series. Hydraulic filter elements. Test methods Verification of collapse/burst pressure rating
Hardcopy , PDF
English
31-03-2015
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Test circuit and equipment
6 Accuracy of measurements and variations of
test conditions
7 Test procedure
8 Reporting
9 Acceptance criteria
Annex A (informative) - Test data report form
Annex B (informative) - Examples of abrupt decrease in
the slope of the differential pressure versus
contaminant mass added curve and increase
in particle counts
Bibliography
Explains a method for verifying the collapse/burst pressure rating of an aerospace hydraulic fluid power filter element.
| Committee |
ACE/69
|
| DevelopmentNote |
Supersedes 13/30271038 DC. (03/2015)
|
| DocumentType |
Standard
|
| Pages |
20
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO14085 describes a method for verifying the collapse/burst pressure rating of an aerospace hydraulic fluid power filter element. This represents the capability of a filter element to withstand a designated differential pressure in the normal (intended) direction of flow, created by flowing contaminated fluid through the filter element until either collapse/burst occurs or the maximum expected differential pressure is reached without element failure.
The collapse/burst pressure test can be conducted in conjunction with an efficiency test performed according to the procedure defined in the ISO14085-3 by continuing the contaminant injection until the designated filter element differential pressure is reached.
This part of ISO14085 is not intended to qualify a filter element under replicate conditions of service; this can only be done by a specific test protocol developed for the purpose, including actual conditions of use, for example the operating fluid or contamination.
The tests data resulting from application of this part of ISO14085 can be used to compare the performance of aerospace hydraulic filter elements.
| Standards | Relationship |
| ISO 14085-4:2015 | Identical |
| ISO 5598:2008 | Fluid power systems and components Vocabulary |
| ISO 11943:1999 | Hydraulic fluid power On-line automatic particle-counting systems for liquids Methods of calibration and validation |
| ISO 14085-3:2015 | Aerospace series — Hydraulic filter elements — Test methods — Part 3: Filtration efficiency and retention capacity |
| ISO 2942:2004 | Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first bubble point |
| ISO 1219-1:2012 | Fluid power systems and components — Graphical symbols and circuit diagrams — Part 1: Graphical symbols for conventional use and data-processing applications |
| ISO 12103-1:2016 | Road vehicles — Test contaminants for filter evaluation — Part 1: Arizona test dust |
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