ISO INTERNATIONAL STANDARD 23551-1 Second edition 2012-08-15 Safetyandcontroldevicesforgas burnersandgas-burningappliances Particularrequirements- Part 1: Automaticandsemi-automaticvalves Dispositifsdecommandeetdesecuritepourbruleursagaz etappareils agaz-Exigencesparticulieres Partie1:Robinetsautomatiquesetsemi-automatiques Reference number ISO 23551-1:2012(E) ?ISO2012 ISO23551-1:2012(E) @ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Casepostale56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO23551-1:2012(E) Contents Page Foreword. Introduction. 1 Scope. 2 Normative references.... 3 Terms anddefinitions. 4 Classification.... 4.1 Classesofcontrol 4.2 Groups ofcontrols... 5 Test conditions.. 6 Construction 6.1 General... 6.2 Constructionrequirements 6.3 Materials.... 6.4 Gasconnections 7 Performance... LL 7.1 General..... 7.2 Leak-tightness 12 7.3 Torsion and bending... 12 7.4 13 Rated flowrate.... 7.5 Durability .... 7.6 Functional requirements... 7.7 Endurance.... 8 EMC/Electricalrequirements 22 8.1 Protectionagainstenvironmentalinfluences 22 8.2 Variationsinsupplyvoltage.. 8.3 Short-termvoltage interruptions anddrops. 8.4 Variations in supply frequency .... 22 8.5 Surge immunity test.... 22 8.6 Electricalfasttransient/burst 22 8.7 Immunitytoconducteddisturbances 22 8.8 Immunity to radiated fields... 8.9 Electrostaticdischargeimmunitytest... 22 8.10 Testforimmunitytopower-frequencymagneticfield 22 8.11 Electrical requirements.... 22 8.101 Electrical components... 9 Marking,installationandoperating instructions.. 25 9.1 25 9.2 Installationandoperatinginstructions 26 9.3 Warning notice....... 26 AnnexA (informative)Leak-tightnesstest-Volumetric method..... 27 AnnexB(informative)Leak-tightnesstest-pressure-lossmethod. 28 AnnexC(normative)Conversionofpressurelossintoleakagerate. 29 AnnexD(normative)Testforimmunitytopower-frequencymagneticfields 30 AnnexE(normative)Specificregional requirements inEuropeancountries ISO23551-1:2012(E) AnnexF(normative)Specificregionalrequirements inCanadaandtheUSA F.1 General.. F.2 Additional requirementsandmodifications .32 AnnexG(normative)Specificregionalrequirements inJapan G.1 General. .34 G.2 Additionalrequirementsandmodifications .34 Bibliography. Figures Figure1—Balancedvalvewithtwoports. 8 Figure2Balancedvalvewith oneport. Tables Table1-Testpressure .12 Table2— Sealingforcerequirements 16 Table3—Operatingcycles ...20 Table4—Operatingcyclesforautomaticshut-offvalvesforcookers .21 TableG.1—Operatingcycles 35 ISO23551-1:2012(E) Foreword ISO (the International Organizationfor Standardization) is a worldwidefederation of national standards bodies International Electrotechnical Commission (IEC)onall mattersof electrotechnical standardization. International Standards are drafted in accordance with therules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards.Draft International Standards adoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.Publicationasan InternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. 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. ISO23551-1waspreparedbyTechnicalCommitteeISO/TC161,Controlandprotectivedevicesforgas and/oroilburners andappliances. This second edition cancels and replaces the first edition (Is0 23551-1:2006), which has been technically revised. In particular, the following has been changed: a) integration of nonelectrical requirementsfromIEC 60730-2-17; b) integration of electrical requirements from IEC 60730-2-17 which are unalterable for valves; c) intro