1、BSI Standards PublicationBS ISO 19973-5:2015Pneumatic fluid power Assessment of componentreliability by testingPart 5: Non-return valves, shuttle valves,dual pressure valves (AND function), one-way adjustable flow control valves, quick-exhaust valvesBS ISO 19973-5:2015 BRITISH STANDARDNational forew
2、ordThis British Standard is the UK implementation of ISO 19973-5:2015. The UK participation in its preparation was entrusted to TechnicalCommittee MCE/18, Fluid power systems and components.A list of organizations represented on this committee can be obtained on request to its secretary.This publica
3、tion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 74867 7 ICS 23.100.01 Compliance with a British Standard cannot confer immunity
4、 from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19973-5:2015 ISO 2015Pneumatic fluid power Assessment of component reli
5、ability by testing Part 5: Non-return valves, shuttle valves, dual pressure valves (AND function), one-way adjustable flow control valves, quick-exhaust valvesTransmissions pneumatiques valuation par essais de la fiabilit des composants Partie 5: Clapets anti-retour, vannes slecteur de circuit, dist
6、ributeurs deux pressions (fonction AND), limiteurs de dbit rglable monodirectionnel, purge rapideINTERNATIONAL STANDARDISO19973-5First edition2015-09-01Reference numberISO 19973-5:2015(E)BS ISO 19973-5:2015ISO 19973-5:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Publi
7、shed in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permissi
8、on can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19973-5:2015ISO 19973-5:2015(E)For
9、eword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions .24 Symbols and units .25 Test equipment.25.1 Basic test equipment 25.2 Connecting piping and volumes . 56 Test conditions .56.1 General test conditions 56.2 Initial condition 56.3 Cycling frequencies . 56.3.1 Non-retur
10、n valves and one-way adjustable flow control valves . 56.3.2 Pilot-operated non-return valves 66.3.3 Quick-exhaust valves 76.3.4 Shuttle valves and dual pressure valves (AND function) 87 Test procedure .107.1 Timing of checks and measurements . 107.2 Type and scope of checks and measurements 107.2.1
11、 Functional check .107.2.2 Measurement of leakage 107.2.3 Measurement of shifting pressures 117.3 Recording of test data 118 Failure criteria and threshold levels 128.1 General 128.2 Functional failure . 128.3 Failure due to leakage 128.4 Failure due to shifting pressures 128.5 Customised agreements
12、 . 129 Data analysis 1210 Test report 1311 Identification statement (reference to this part of ISO 19973).13Annex A (informative) Test data sheet 14Bibliography .18 ISO 2015 All rights reserved iiiContents PageBS ISO 19973-5:2015ISO 19973-5:2015(E)ForewordISO (the International Organization for Stan
13、dardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right
14、 to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures u
15、sed to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules
16、 of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identifi
17、ed during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on t
18、he meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/
19、TC 131, Fluid power systems.ISO 19973 consists of the following parts, under the general title Pneumatic fluid power Assessment of component reliability by testing: Part 1: General procedures Part 2: Directional control valves Part 3: Cylinders with piston rod Part 4: Pressure regulators Part 5: Non
20、-return valves, shuttle valves, dual pressure valves (AND function), one-way adjustable flow control valves, quick-exhaust valvesiv ISO 2015 All rights reservedBS ISO 19973-5:2015ISO 19973-5:2015(E)IntroductionIn pneumatic fluid power systems, power is transmitted and controlled through a gas under
21、pressure within a circuit. Pneumatic fluid power systems are composed of components and are an integral part of various types of machines and equipment. Efficient and economical production requires highly reliable machines and equipment. This part of ISO 19973 is intended to provide requirements and
22、 test conditions that permit the assessment of the inherent reliability of pneumatic non-return valves, shuttle valves, dual pressure valves (AND function), one-way flow control valves, quick-exhaust valves.It is necessary that machine producers know the reliability of the components that make up th
23、eir machines pneumatic fluid power system. Knowing the reliability characteristic of the component, the producers can model the system and make decisions on service intervals, spare parts inventory and areas for future improvements.There are three primary levels in the determination of component rel
24、iability:a) preliminary design analysis: finite element analysis (FEA), failure mode and effect analysis (FMEA);b) laboratory testing and reliability modelling: physics of failure, reliability prediction, pre-produc-tion evaluation;c) collection of field data: maintenance reports, warranty analysis.
25、Each level has its application during the life of a component. A preliminary design analysis is useful to identify possible failure modes and eliminate them or reduce their effect on reliability. When prototypes are available, in-house laboratory reliability tests are run and initial reliability can
26、 be determined. Reliability testing is often continued into the initial production run and throughout the production lifetime as a continuing evaluation of the component. Collection of field data are possible when products are operating and data on their failures are available. ISO 2015 All rights r
27、eserved vBS ISO 19973-5:2015BS ISO 19973-5:2015Pneumatic fluid power Assessment of component reliability by testing Part 5: Non-return valves, shuttle valves, dual pressure valves (AND function), one-way adjustable flow control valves, quick-exhaust valves1 ScopeThis part of ISO 19973 provides test
28、procedures for assessing the reliability of the following types of pneumatic valves: non-return (check) valves; pilot-operated non-return valves; shuttle valves; dual pressure valves (AND function); one-way adjustable flow control valves; quick-exhaust valvesby testing and the methods of reporting t
29、he results of testing. General test conditions and the calculation method are provided in ISO 19973-1. The methods specified in ISO 19973-1 apply to the first failure, as obtained with the three-points moving average (3PMA) method, without repairs, but excluding outliers.The lifetime of these pneuma
30、tic valves is usually given as a number of cycles. Therefore, whenever the term “time” is used in this part of ISO 19973, this variable is understood as a number of cycles.This part of ISO 19973 also specifies test equipment and threshold levels for tests to assess the reliability of these pneumatic
31、 valves.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including an
32、y amendments) applies.ISO 1219-1, Fluid power systems and components Graphical symbols and circuit diagrams Part 1: Graphical symbols for conventional use and data-processing applicationsISO 5598, Fluid power systems and components VocabularyISO 8778, Pneumatic fluid power Standard reference atmosph
33、ereISO 11727, Pneumatic fluid power Identification of ports and control mechanisms of control valves and other componentsISO 19973-1, Pneumatic fluid power Assessment of component reliability by testing Part 1: General proceduresINTERNATIONAL STANDARD ISO 19973-5:2015(E) ISO 2015 All rights reserved
34、 1BS ISO 19973-5:2015ISO 19973-5:2015(E)ISO 80000-1, Quantities and units Part 1: GeneralIEC 60050-191, International Electrotechnical Vocabulary, chapter 191: Dependability and quality of service3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 5598, I
35、SO 19973-1, IEC 60050-191, and the following apply.NOTE Where a conflict of definitions exists for a term in any of these three documents, the following priority order applies: first, ISO 19973-5; second, ISO 19973-1; third, ISO 5598; and fourth, IEC 60050191.3.1dual pressure valve (AND function)val
36、ve in which an output signal is only obtained when both inlets are under pressureNote 1 to entry: The weaker signal is fed to the output.4 Symbols and unitsUnits of measurement shall be in accordance with ISO 80000-1.NOTE 1 Graphical symbols used in this part of ISO 19973 conform to the requirements
37、 of ISO 1219-1.NOTE 2 Ports are identified in accordance with ISO 11727.5 Test equipment5.1 Basic test equipmentBasic test equipment shall conform to the requirements given in Table 1 and Figure 1 through Figure 5, depending on the type of valve under test (test unit). Any silencers fitted to exhaus
38、t ports shall not restrict the valves flow rate. The rated flow rate of the directional control valves shall be equal to or greater than the rated flow rate of the test unit.The basic circuits in Figures 1 through 5 do not incorporate all the safety devices necessary to protect against damage in the
39、 event of component failure. It is important that those responsible for carrying out the test give due consideration to safeguarding both personnel and equipment.Table 1 Key to the test circuit components shown in Figures 1 through 5Key item number Description1, 2, 3 ports of the test unit4 supply p
40、ressure5 silencer6 volume7 pressure transducer, necessary for test set-up and intermediate functional tests only8 test unit12 pilot portV1, V2 directional control valve2 ISO 2015 All rights reservedBS ISO 19973-5:2015ISO 19973-5:2015(E)NOTE See Table 1 for the key to the test circuit components.Figu
41、re 1 Basic test equipment requirements for non-return valves and one-way flow control valvesNOTE See Table 1 for the key to the test circuit components.Figure 2 Basic test equipment requirements for pilot-operated non-return valves ISO 2015 All rights reserved 3BS ISO 19973-5:2015ISO 19973-5:2015(E)
42、NOTE See Table 1 for the key to the test circuit components.Figure 3 Basic test equipment requirements for quick-exhaust valvesNOTE See Table 1 for the key to the test circuit components.Figure 4 Basic test equipment requirements for shuttle valves4 ISO 2015 All rights reservedBS ISO 19973-5:2015ISO
43、 19973-5:2015(E)NOTE See Table 1 for the key to the test circuit components.Figure 5 Basic test equipment requirements for dual pressure valves (AND function)5.2 Connecting piping and volumes5.2.1 Connect the volume to the outlet ports of the test units either directly or by means of sections of tub
44、es, in a manner that does not restrict flow.NOTE Volume sizes are given in ISO 19973-1.5.2.2 Tubes in the connecting lines shall be kept as short as possible so that the volumes can be charged and vented within the times provided by the control signal.6 Test conditions6.1 General test conditionsThe
45、general test conditions shall be in accordance with ISO 19973-1.6.2 Initial conditionAll new test units shall pass a functional check (see 7.2) and the initial test data shall not exceed the threshold levels defined in this part of ISO 19973.6.3 Cycling frequencies6.3.1 Non-return valves and one-way
46、 adjustable flow control valves6.3.1.1 The test units shall be operated in a manner that the pressure p2in the outlet port volume drops below 10 %, and rises above 90 %, of the supply pressure during the cycle. ISO 2015 All rights reserved 5BS ISO 19973-5:2015ISO 19973-5:2015(E)6.3.1.2 The adjustmen
47、t screw of one-way adjustable flow control valves shall be closed and locked in this position during the test.6.3.1.3 The control signal shall be applied to the test units in accordance with Figure 6.KeyV1, V2 control valve signals t timep1pressure at inlet port nTcycle timep2pressure at outlet port
48、Figure 6 Sequence of signals for non-return valves and one-way flow control valves6.3.2 Pilot-operated non-return valves6.3.2.1 The test units shall be operated in a manner that the pressure p2in the outlet port volume drops below 10 %, and rises above 90 %, of the supply pressure during the cycle.6
49、.3.2.2 The control signal shall be applied to the test units in accordance with Figure 7.6 ISO 2015 All rights reservedBS ISO 19973-5:2015ISO 19973-5:2015(E)KeyV1 control valve signals p12pressure at pilot port12p1pressure at inlet port t timep2pressure at outlet port nTcycle timeFigure 7 Sequence of signals for pilot-operated non-return valves6.3.3 Quick-exhaust valves6.3.3.1 The test units shall be operated in a manner that the pressure p2in the outlet port volume drops below 10 %, and
