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ISO 14085-3:2015

Current
Current

The latest, up-to-date edition.

Aerospace series Hydraulic filter elements Test methods Part 3: Filtration efficiency and retention capacity
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

02-26-2015

ISO 14085-3:2015 describes two methods to measure in repeatable conditions the filtration efficiency of filter elements used in aviation and aerospace hydraulic fluid systems. It can be applied when evaluating the overall characteristics of a filter element per ISO 140851, or separately.

Since the filtration efficiency of a filter element can change during its service life as it is clogging, this test method specifies its continuous measurement by using on-line particle counters with continuous injection of test contaminant and recirculation of particles not retained by the test filter element until the differential pressure across the element reaches a given final or "terminal" value.

ISO 14085-3:2015 allows the efficiency to be measured under both steady or cyclic flow conditions. It also is applied to measure the stabilized contamination levels that are produced by the filter element while testing with cyclic flow.

ISO 14085-3:2015 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 ISO 14085 can be used to compare the performance of aerospace hydraulic filter elements.

DevelopmentNote
Supersedes ISO/DIS 14085-3. (02/2015)
DocumentType
Standard
Pages
37
PublisherName
International Organization for Standardization
Status
Current

Standards Relationship
BS ISO 14085-3:2015 Identical

BS ISO 14085-4:2015 Aerospace series. Hydraulic filter elements. Test methods Verification of collapse/burst pressure rating
BS ISO 14085-5:2015 Aerospace series. Hydraulic filter elements. Test methods Resistance to flow fatigue
BS ISO 14085-1:2015 Aerospace series. Hydraulic filter elements. Test methods Test sequence
ISO 14085-1:2015 Aerospace series Hydraulic filter elements Test methods Part 1: Test sequence
ISO 14085-5:2015 Aerospace series Hydraulic filter elements Test methods Part 5: Resistance to flow fatigue
ISO 14085-4:2015 Aerospace series Hydraulic filter elements Test methods Part 4: Verification of collapse/burst pressure rating

ISO 3968:2017 Hydraulic fluid power — Filters — Evaluation of differential pressure versus flow
NFL 41 137 : 1987 XP CONTAMINATION OF AIRCRAFT FUEL SYSTEMS - FILTERS AND FILTER ELEMENTS - FILTRATION EFFICIENCY
ISO 5598:2008 Fluid power systems and components Vocabulary
ISO/TR 16144:2002 Hydraulic fluid power Calibration of liquid automatic particle counters Procedures used to certify the standard reference material SRM 2806
ISO 11943:1999 Hydraulic fluid power On-line automatic particle-counting systems for liquids Methods of calibration and validation
ISO 11218:2017 Aerospace Cleanliness classification for hydraulic fluids
ISO 3722:1976 Hydraulic fluid power — Fluid sample containers — Qualifying and controlling cleaning methods
MIL-PRF-81836 Revision B:1998 FILTER AND DISPOSABLE ELEMENT, FLUID PRESSURE, HYDRAULIC, 3 MICRON ABSOLUTE
NFL 41 127 : 1987 XP CONTAMINATION OF AIRCRAFT HYDRAULIC SYSTEMS - FILTERS AND FILTER ELEMENTS - FILTRATION EFFICIENCY AND RATING OF RETENTION CAPACITY
ISO 11171:2016 Hydraulic fluid power Calibration of automatic particle counters for liquids
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
SAE ARP 4205 : 2005 AEROSPACE FLUID POWER - HYDRAULIC FILTER ELEMENTS - METHOD FOR EVALUATING DYNAMIC EFFICIENCY WITH CYCLIC FLOW
MIL F 8815 : D FILTER AND FILTER ELEMENTS, FLUID PRESSURE, HYDRAULIC LINE, 15 MICRON ABSOLUTE AND 5 MICRON ABSOLUTE, TYPE 11 SYSTEMS; GENERAL SPECIFICATION FOR
ISO 16889:2008 Hydraulic fluid power Filters Multi-pass method for evaluating filtration performance of a filter element
ISO 12103-1:2016 Road vehicles — Test contaminants for filter evaluation — Part 1: Arizona test dust
ISO 4021:1992 Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of an operating system
ISO 4405:1991 Hydraulic fluid power — Fluid contamination — Determination of particulate contamination by the gravimetric method

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