1、BSI Standards PublicationBS ISO 23551-5:2014Safety and control devices forgas burners and gas-burningappliancesPart 5: Manual gas valvesBS ISO 23551-5:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 23551-5:2014.The UK participation in its preparation was
2、entrusted to TechnicalCommittee GSE/22, Safety and control devices for gas and oilburners and gas burning appliances.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract
3、. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 78369 2ICS 27.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority
4、 of theStandards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedBS ISO 23551-5:2014 ISO 2014Safety and control devices for gas burners and gas-burning appliances Particular requirements Part 5: Manual gas valvesDispositifs de commande et de scurit p
5、our brleurs gaz et appareils gaz Exigences particulires Partie 5: Robinets de gaz manuelsINTERNATIONAL STANDARDISO23551-5First edition2014-05-01Reference numberISO 23551-5:2014(E)BS ISO 23551-5:2014ISO 23551-5:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights rese
6、rved. 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. Permission can be requested from either IS
7、O at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 23551-5:2014ISO 23551-5:2014(E) ISO 2014 All rights reserved
8、 iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Classes of control 24.1 Classes of controls 24.2 Groups of controls 35 Test conditions . 36 Construction 36.1 General . 36.2 Construction requirements 36.3 Materials . 46.4 Gas connections 56.10
9、2 Appliance connector valves . 77 Performance 87.1 General . 87.2 Leak-tightness 87.3 Torsion and bending 87.4 Rated flow rate 87.5 Durability . 97.6 Functional requirements: Operating torque and force 97.7 Endurance 138 EMC/Electrical requirements 159 Marking, installation and operating instruction
10、s .159.1 Marking 159.2 Installation and operating instructions 169.3 Warning notice . 17Annex A (informative) Leak-tightness test Volumetric method .18Annex B (informative) Leak-tightness test Pressure-loss method 19Annex C (normative) Conversion of pressure loss into leakage rate .20Annex D (normat
11、ive) Test for immunity to power-frequency magnetic fields21Annex E (normative) Specific regional requirements in European countries .22Annex F (normative) Specific regional requirements in Canada and USA .23Annex G (normative) Specific regional requirements in Japan .25Annex AA (informative) Example
12、s of manual gas shut-off valves26Bibliography .33BS ISO 23551-5:2014ISO 23551-5:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out th
13、rough ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collab
14、orates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used 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
15、 criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of
16、patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in
17、 this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the 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 Barrier
18、s to Trade (TBT), see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 161, Control and protective devices for gas and oil burners and gas and oil burning appliances.ISO 23551 consists of the following parts, under the general title Safety
19、and control devices for gas burners and gas-burning appliances Particular requirements: Part 1: Automatic and semi-automatic valves Part 2: Pressure regulators Part 3: Gas/air ratio controls, pneumatic type Part 4: Valve-proving systems for automatic shut-off valves Part 5: Manual gas valves Part 6:
20、 Thermoelectric flame supervision controlsiv ISO 2014 All rights reservedBS ISO 23551-5:2014ISO 23551-5:2014(E)IntroductionThis part of ISO 23551 is designed to be used in combination with ISO 23550. This part of ISO 23551 together with ISO 23550 establishes the full requirements as they apply to th
21、e product covered by this International Standard. This part adapts ISO 23550, where needed, by stating “with the following modification”, “with the following addition”, “is replaced by the following” or “is not applicable”, in the corresponding Clause. In order to identify specific requirements that
22、 are particular to this part, that are not already covered by ISO 23550, this document may contain Clauses or Sub-clauses that are additional to the structure of ISO 23550. These Clauses are numbered starting from 101 or, in the case of an Annex, are designated AA, BB, CC etc.In an attempt to develo
23、p a full International Standard, it has been necessary to take into consideration the differing requirements resulting from practical experience and installation practices in various regions of the world and to recognize the variation in basic infrastructure associated with gas and/or oil controls a
24、nd appliances, some of which are addressed in Annexes E, F and G. This International Standard intends to provide a basic framework of requirements that recognize these differences. ISO 2014 All rights reserved vBS ISO 23551-5:2014BS ISO 23551-5:2014Safety and control devices for gas burners and gas-
25、burning appliances Particular requirements Part 5: Manual gas valves1 ScopeThis part of ISO 23551 specifies safety, constructional and performance requirements for manual gas valves intended for use with gas burners and gas-burning appliances, hereafter referred to as valves, unless otherwise specif
26、ied.This International Standard applies to following types of manual gas valves: manual gas shut-off valve; gas burner valve; appliance connector valve; “delta C” valve.This part of ISO 23551 applies to valves for gas burners and gas-burning appliances of nominal connection size up to and including
27、DN 100 that can be used and tested independently of these appliances using fuel gases, as natural gas, manufactured gas or liquefied petroleum gas (LPG) at inlet pressures up to and including 500 kPa. It is not applicable to corrosive and waste gases.This International Standard covers type testing o
28、nly.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 any am
29、endments) applies.ISO 23550:2011, Safety and control devices for gas burners and gas-burning appliances General requirements3 Terms and definitionsFor the purpose of this document, the terms and definitions given in ISO 23550 and the following apply.3.101manual gas shut-off valvemanually operated va
30、lve for the control of the gas flow from an “off” to an “on” position and vice versaNote 1 to entry: Parts commonly used in manual gas shut-off valves are shown as examples in Figures AA.1 to AA.5.3.102“delta C” valvemanual gas valve suitable for use on food service equipment (commercial cooking equ
31、ipment)Note 1 to entry: These valves are identified by a “delta C” marking.INTERNATIONAL STANDARD ISO 23551-5:2014(E) ISO 2014 All rights reserved 1BS ISO 23551-5:2014ISO 23551-5:2014(E)3.103gas burner valvemanual gas valve that requires user initiation of each usage cycleNote 1 to entry: This type
32、of manual gas valve is intended to be used in Canada and the US between the gas supply piping and the gas burner.Note 2 to entry: The valve is turned on when the burner operating cycle is initiated and turned off when the burner operating cycle is completed.3.104appliance connector valvemanual gas v
33、alve having a non-displaceable valve member, a minimum specified capacity and an internal taper pipe thread inlet and an outlet for flared tubing connectionNote 1 to entry: This type of manual gas valve is intended to be used in Canada and the US between the gas supply piping and the appliance conne
34、ctor attached to the appliance.Note 2 to entry: For minimum capacity see Table 2 and for inlet and outlet connection see 6.102.3.105flow rate curvecurve which indicates the air flow in relation to the angle of opening3.106bearing sealshortest distance between gas-carrying parts and the atmosphere me
35、asured along the length of the sealing surfaces3.107plugtapered valve member of a manual gas valve containing one or more gas flow openings3.108non-displaceable valve membervalve member that cannot be moved from its seat by a force applied to the handle, or force applied by a plane surface to any ex
36、terior portion of the valve3.109safety lockmeans in a manual valve that requires a separate action of the user before being able to open the valveEXAMPLE Pushing on the valve handle to “unlatch” the valve before the valve handle can be rotated to turn on the gas.Note 1 to entry: A safety lock is als
37、o known as “niting arrangement”.4 Classes of control4.1 Classes of controlsShall be according to ISO 23550:2011, 4.1 with the following addition:Manual gas valves are classified according to the number of operations: 1 000 operations (e.g. appliance connector valves); 5 000 operations (e.g. central
38、heating); 10 000 operations (e.g. space heaters); 12 000 operations; and2 ISO 2014 All rights reservedBS ISO 23551-5:2014ISO 23551-5:2014(E) 40 000 operations (e.g. domestic cooking).NOTE Number of operations during the expected life of the appliance.4.2 Groups of controlsShall be according to ISO 2
39、3550:2011, 4.2.5 Test conditionsShall be according to ISO 23550:2011, Clause 5.6 Construction6.1 GeneralShall be according to ISO 23550:2011, 6.1.6.2 Construction requirements6.2.1 AppearanceShall be according to ISO 23550:2011, 6.2.1.6.2.2 HolesShall be according to ISO 23550:2011, 6.2.2.6.2.3 Brea
40、ther holesISO 23550:2011, 6.2.3 is not applicable.6.2.4 Screwed fasteningsShall be according to ISO 23550:2011, 6.2.4.6.2.5 JointingShall be according to ISO 23550:2011, 6.2.5.6.2.6 Moving partsShall be according to ISO 23550:2011, 6.2.6.6.2.7 Sealing capsShall be according to ISO 23550:2011, 6.2.7.
41、6.2.8 Dismantling and reassembling for servicing and/or adjustmentShall be according to ISO 23550:2011, 6.2.8.6.2.9 Auxiliary channelsShall be according to ISO 23550:2011, 6.2.9. ISO 2014 All rights reserved 3BS ISO 23551-5:2014ISO 23551-5:2014(E)6.2.101 Operating parts of manual gas valvesManual ga
42、s valves operated by rotation shall be opened by turning the operating device anticlockwise and closed by turning it clockwise, except for valves, which provide more than one burner with gas. Alternate construction is acceptable provided the rotation direction is clearly marked or specified in the o
43、perations and in installation instructions. Manual gas valves with 90 rotation do not have to meet these requirements when the construction is such that the lever or tee handle is 90 to the line of flow in the off position and parallel to the line of flow in the on position.A separable handle, remov
44、able without further disassembly of the valve, shall be attached by tamper-resistant means unless removal of the handle does not affect the leak tightness of the valve or the retention of the valve member.Manual gas shut-off valves shall be operated without the use of tools.It shall not be possible
45、to exert direct axial pressure (other than spring pressure) on the closure member when the operating spindle is depressed to clear any safety lock.6.2.102 Seating forceManual gas valves shall be provided with a means, other than gravity, to maintain a continuous seating force to compensate for manuf
46、acturing tolerances, operational variations, or displacement of lubricant(s).It shall not be possible in normal use to apply such forces to the closure member that it is lifted out of its seat or is brought into a position which causes the leakage rates to exceed the values given in 7.2.6.2.103 Tape
47、red plug cavityFor taper plug manual gas valves the closure member included angle shall be at least 9 25. The taper plug at the large diameter shall be recessed into the body, and the plug shall protrude beyond the taper of the body at the small end. There shall be adequate clearance provided for th
48、is protrusion.NOTE Regional specific requirements are given in Annex F.6.3 Materials6.3.1 General material requirementsShall be according to ISO 23550:2011, 6.3.1.6.3.2 Housing6.3.2.1 Housing designShall be according to ISO 23550:2011, 6.3.2.1 with the following modification.Item b) is not applicabl
49、e. O-rings, gaskets and other seals are exempt.6.3.2.2 Test for leakage of housing after removal of non-metallic partsShall be according to ISO 23550:2011, 6.3.2.2.6.3.2.101 Manual gas valves with shaft sealFor manual gas valves with shaft seals, the shaft seal is excluded from the requirement in 6.3.2.1, if the following requirements are met:4 ISO 2014 All rights reservedBS ISO 23551-5:2014ISO 23551-5:2014(E)The structure surrounding a shaft seal shall be such as to confine the seal properly and, with the seal r
