BS ISO 3968:2017
Current
The latest, up-to-date edition.
Hydraulic fluid power. Filters. Evaluation of differential pressure versus flow
Hardcopy , PDF
English
19-09-2017
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Operational characteristics
to be tested
6 Filter to be tested
7 Test equipment
8 Measurements
9 Procedure
10 Presentation of results
11 Identification statement (reference to this document)
Annex A (informative) - Introduction to the power loss
equation and method to calculate
Bibliography
Describes a procedure for evaluating differential pressure versus flow characteristics of hydraulic filters and constitutes a basis for agreement between the filter manufacturer and user.
| Committee |
MCE/18/-/6
|
| DevelopmentNote |
Supersedes BS 6277(1982). (02/2002) Supersedes 98/716986 DC (02/2003) Supersedes 16/30317112 DC. (10/2017)
|
| DocumentType |
Standard
|
| Pages |
26
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This document 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 follows:
Type 1: which are spin-on filters in which the replaceable unit does not include a filter head (it might or might not include the element by-pass valve);
Type 2: which are spin-on filters in which the replaceable element is tested together with a filter head (it might or might not include the element by-pass valve);
Type 3: which are filter assembly, usually of the replacement element type, that is the housing (head and bowl) and element.
| Standards | Relationship |
| ISO 3968:2017 | Identical |
| ISO 9110-1:1990 | Hydraulic fluid power Measurement techniques Part 1: General measurement principles |
| ISO 3675:1998 | Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method |
| ISO 5598:2008 | Fluid power systems and components Vocabulary |
| ISO 6415:2005 | Internal combustion engines — Spin-on filters for lubricating oil — Dimensions |
| 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 16889:2008 | Hydraulic fluid power Filters Multi-pass method for evaluating filtration performance of a filter element |
| ISO 2909:2002 | Petroleum products Calculation of viscosity index from kinematic viscosity |
| ISO 9110-2:1990 | Hydraulic fluid power Measurement techniques Part 2: Measurement of average steady-state pressure in a closed conduit |
| ISO 4021:1992 | Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of an operating system |
| ISO 2944:2000 | Fluid power systems and components — Nominal pressures |
| ISO 3448:1992 | Industrial liquid lubricants — ISO viscosity classification |
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