BS ISO 19973-4:2014
Current
The latest, up-to-date edition.
Pneumatic fluid power. Assessment of component reliability by testing Pressure regulators
Hardcopy , PDF
English
31-03-2014
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Test equipment
6 Test conditions
7 Test procedure
8 Failure criteria and threshold levels
9 Data analysis
10 Test report
11 Identification statement (reference to this
part of ISO 19973)
Annex A (informative) - Flow chart illustrating
the test procedure specified in this
part of ISO 19973
Annex B (informative) - Optional expanded test circuit
Annex C (informative) - Test data sheet
Bibliography
Gives test procedures for assessing the reliability of pneumatic pressure regulators by testing and the methods of reporting the results of testing.
| Committee |
MCE/18/-/5
|
| DevelopmentNote |
Supersedes 05/30128814 DC. (09/2007)
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO19973 provides test procedures for assessing the reliability of pneumatic pressure regulators by testing and the methods of reporting the results of testing. General test conditions and the calculation method are provided in ISO19973-1. The methods specified in ISO19973-1 apply to the first failure, as obtained with the three-points moving average (3PMA) method, without repairs, but excluding outliers.
The lifetime of pneumatic pressure regulators is usually given as a number of cycles. Therefore, whenever the term “time” is used in this part of ISO19973, this variable shall be understood as either cycles or time.
This part of ISO19973 applies to manually adjustable and remote-piloted pressure regulators, both relieving and non-relieving. This part of ISO19973 does not apply to pressure regulators that have a permanent bleed.
This part of ISO19973 also specifies test equipment and failure criteria (threshold levels) for tests to assess the reliability of pneumatic pressure regulators.
The life determined by the method in this part of ISO19973 and in ISO19973-1 will be more closely related to applications that have a large variation in flow rate.
NOTE See AnnexA for a flow chart illustrating the test procedure specified in this part of ISO19973.
| Standards | Relationship |
| ISO 19973-4:2014 | Identical |
| ISO 6953-3:2012 | Pneumatic fluid power — Compressed air pressure regulators and filter-regulators — Part 3: Alternative test methods for measuring the flow-rate characteristics of pressure regulators |
| ISO 8778:2003 | Pneumatic fluid power — Standard reference atmosphere |
| ISO 5598:2008 | Fluid power systems and components Vocabulary |
| ISO 19973-1:2015 | Pneumatic fluid power Assessment of component reliability by testing Part 1: General procedures |
| ISO 6953-1:2015 | Pneumatic fluid power — Compressed air pressure regulators and filter-regulators — Part 1: Main characteristics to be included in literature from suppliers and product-marking requirements |
| ISO 80000-1:2009 | Quantities and units — Part 1: General |
| 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 6953-2:2015 | Pneumatic fluid power — Compressed air pressure regulators and filter-regulators — Part 2: Test methods to determine the main characteristics to be included in literature from suppliers |
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