1、 Reference number ISO 23551-1:2012(E) ISO 2012INTERNATIONAL STANDARD ISO 23551-1 Second edition 2012-08-15 Safety and control devices for gas burners and gas-burning appliances Particular requirements Part 1: Automatic and semi-automatic valves Dispositifs de commande et de scurit pour brleurs gaz e
2、t appareils gaz Exigences particulires Partie 1: Robinets automatiques et semi-automatiques ISO 23551-1:2012(E) ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photoco
3、pying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switze
4、rland ii ISO 2012 All rights reservedISO 23551-1:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword . v Introduction vi 1 Scope 1 2 Normative references 1 3 Terms and definitions . 2 4 Classification . 5 4.1 Classes of control . 5 4.2 Groups of controls 5 5 Test conditions 6 6 Constructi
5、on 6 6.1 General . 6 6.2 Construction requirements 6 6.3 Materials . 9 6.4 Gas connections 10 7 Performance . 11 7.1 General . 11 7.2 Leak-tightness . 12 7.3 Torsion and bending . 12 7.4 Rated flow rate . 13 7.5 Durability 13 7.6 Functional requirements. 13 7.7 Endurance 18 8 EMC/Electrical requirem
6、ents 22 8.1 Protection against environmental influences 22 8.2 Variations in supply voltage . 22 8.3 Short-term voltage interruptions and drops . 22 8.4 Variations in supply frequency 22 8.5 Surge immunity test 22 8.6 Electrical fast transient/burst . 22 8.7 Immunity to conducted disturbances . 22 8
7、.8 Immunity to radiated fields . 22 8.9 Electrostatic discharge immunity test 22 8.10 Test for immunity to power-frequency magnetic field 22 8.11 Electrical requirements . 22 8.101 Electrical components 24 9 Marking, installation and operating instructions . 25 9.1 Marking . 25 9.2 Installation and
8、operating instructions . 26 9.3 Warning notice . 26 Annex A (informative) Leak-tightness test - Volumetric method . 27 Annex B (informative) Leak-tightness test - pressure-loss method 28 Annex C (normative) Conversion of pressure loss into leakage rate . 29 Annex D (normative) Test for immunity to p
9、ower-frequency magnetic fields . 30 Annex E (normative) Specific regional requirements in European countries 31 ISO 23551-1:2012(E) iv ISO 2012 All rights reservedAnnex F (normative) Specific regional requirements in Canada and the USA .32 F.1 General 32 F.2 Additional requirements and modifications
10、 .32 Annex G (normative) Specific regional requirements in Japan .34 G.1 General 34 G.2 Additional requirements and modifications .34 Bibliography 36 Figures Figure 1 Balanced valve with two ports. 8 Figure 2 Balanced valve with one port 9 Tables Table 1 Test pressure . 12 Table 2 Sealing force requ
11、irements 16 Table 3 Operating cycles 20 Table 4 Operating cycles for automatic shut- off valves for cookers 21 Table G.1 Operating cycles . 35 ISO 23551-1:2012(E) ISO 2012 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national sta
12、ndards 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 to be represented on that committee. International or
13、ganizations, 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. International Standards are drafted in accordance with the rules give
14、n in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 7
15、5 % of the member bodies casting a vote. 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. ISO 23551-1 was prepared by Technical Committee ISO/TC 161,
16、Control and protective devices for gas and/or oil burners and appliances. This second edition cancels and replaces the first edition (ISO 23551-1:2006), which has been technically revised. In particular, the following has been changed: a) integration of non electrical requirements from IEC 60730-2-1
17、7; b) integration of electrical requirements from IEC 60730-2-17 which are unalterable for valves; c) introduction of further classifications for valves; d) introduction of requirements and tests for balanced valves; e) introduction of requirements and tests for valves containing electrical componen
18、ts in the gas way. ISO 23551 consists of the following parts, under the general title Safety 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
19、Part 4: Valve-proving systems for automatic shut-off valves The following parts are under preparation: Part 5: Manual gas valves Part 6: Thermoelectric flame supervision devices Part 7: Pressure sensing devices Part 8: Multifunctional Controls ISO 23551-1:2012(E) vi ISO 2012 All rights reservedIntro
20、duction This part of ISO 23551 is designed to be used in combination with ISO 23550. This part together with ISO 23550 establishes the full requirements as they apply to the product covered by this International Standard. This part adapts ISO 23550, where needed, by stating “with the following modif
21、ication“, “with the following addition“, “is replaced by the following“ or “is not applicable,“ in the corresponding clause. In order to identify specific requirements that are particular to this part, that are not already covered by ISO 23550, this document may contain clauses or subclauses that ar
22、e 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 develop a full International Standard, it has been necessary to take into consideration the differing requirements resulting from prac
23、tical 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 and appliances, some of which are addressed in Annexes E, F and G. This International Standard intends to provide a basic framewo
24、rk of requirements that recognize these differences. INTERNATIONAL STANDARD ISO 23551-1:2012(E) ISO 2012 All rights reserved 1Safety and control devices for gas burners and gas-burning appliances Particular requirements Part 1: Automatic and semi-automatic valves 1 Scope This part of ISO 23551 speci
25、fies safety, constructional and performance requirements and testing of automatic and semi-automatic shut-off valves for gas burners, gas appliances and appliances of similar use. It applies to normally closed valves, valves being mounted upstream to gas burners and gas appliances, valves with decla
26、red maximum working pressures up to and including 500 kPa, for use on burners or in appliances using fuel gases as natural gas, manufactured gas or liquefied petroleum gas (LPG), valves directly or indirectly actuated, electrically or by mechanical means, valves actuated by hydraulic or pneumatic me
27、ans, valves where the flow rate is controlled by external electrical signals, either in discrete steps or propor- tional to the applied signal and valves fitted with closed position indicator switches. This part of ISO 23551 covers type testing only. 2 Normative references The following documents, i
28、n 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 amendments) applies. ISO 7-1, Pipe threads where press
29、ure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 65, Carbon steel tubes suitable for screwing in accordance with ISO 7-1 ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation ISO 262,
30、ISO general purpose metric screw threads Selected sizes for screws, bolts and nuts ISO 301, Zinc alloy ingots intended for castings ISO 23551-1:2012(E) 2 ISO 2012 All rights reservedISO 1817:1985 1 , Rubber, vulcanized Determination of the effect of liquids ISO 4400, Fluid power systems and componen
31、ts Three-pin electrical plug connectors with earth contact Characteristics and requirements ISO 6952, Fluid power systems and components Two-pin electrical plug connectors with earth contact Characteristics and requirements ISO 7005 (all parts), Metallic flanges ISO 23550:2011, Safety and control de
32、vices for gas burners and gas burning appliances General requirements IEC 60079-11, Explosive atmospheres Part 11: Equipment protection by intrinsic safety “i“ IEC 60529, Degrees of protection provided by enclosures (IP-code) IEC 60730-1:2010 (Edition 4.0), Automatic electrical controls for househol
33、d and similar use Part 1: General requirements IEC 61000-4-2, Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test IEC 61000-4-3, Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques Radiated, radio-frequen
34、cy, electromagnetic field immunity test IEC 61000-4-4, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast transient/burst immunity test IEC 61000-4-5, Electromagnetic compatibility (EMC) Part 4-5: Testing and measurement techniques Surge immunity test IE
35、C 61000-4-6, Electromagnetic compatibility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields IEC 61000-4-8, Electromagnetic compatibility (EMC) Part 4-8: Testing and measurement techniques Power frequency magnetic field immunity
36、test IEC 61000-4-11, Electromagnetic compatibility (EMC) Part 4-11: Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests IEC 61058-1, Switches for appliances Part 1: General requirements 3 Terms and definitions For the purposes of this document,
37、the terms and definitions given in ISO 23550 and the following apply. 3.101 valves 3.101.1 valve device consisting essentially of a valve body, closure member, and actuator that controls the flow of gas NOTE The actuation can be done by gas pressure, electrical, hydraulic, manual or pneumatic energy
38、. 1Withdrawn. ISO 23551-1:2012(E) ISO 2012 All rights reserved 33.101.2 semi-automatic shut-off valve valve that is opened manually and returns to the closed position upon removal of the actuating energy 3.101.3 automatic shut-off valve valve which opens when energized and closes automatically when
39、de-energized 3.101.4 thermoelectric valve automatic shut-off valve that receives its electrical actuating energy by means of a thermoelectric source 3.101.5 diaphragm type valve automatic shut-off valve where a closing member is opened by application of gas pressure upon a flexible diaphragm 3.102 v
40、alve with step control multi stage valve valve which controls the flow rate in steps 3.103 valve with modulating control modulating valve valve which controls the flow rate continuously between two limits in response to external signals 3.104 actuating mechanism part of the valve which moves the clo
41、sure member 3.105 closed position indicator switch switch fitted to a valve which indicates when the closure member is in the closed position 3.106 actuating energy required energy for the actuating mechanism to move the closure member to the open position; the actuating energy can have an external
42、source (electrical, hydraulic or pneumatic) and can be transformed inside the valve 3.107 closing force force available to close the valve, independent of any force provided by fuel gas pressure 3.108 sealing force force acting on the valve seat when the closure member is in the closed position, ind
43、ependent of any force provided by fuel gas pressure 3.109 frictional force largest force required to move the actuating mechanism and the closure member from the open position to the closed position with the closure spring removed, independent of any force provided by fuel gas pressure 3.110 actuati
44、ng pressure hydraulic or pneumatic pressure supplied to the actuating mechanism of the valve ISO 23551-1:2012(E) 4 ISO 2012 All rights reserved3.111 pressure difference difference between the inlet and outlet pressures 3.112 opening time time interval between energizing the valve and the attainment
45、of the maximum or other defined flow rate 3.113 closing time time interval between de-energizing the valve and the closure member attaining the closed position 3.114 delay time time interval between energizing the valve and the start of flow 3.115 control valve valve which controls the hydraulic or
46、pneumatic means supplied to the actuating mechanism 3.116 rated voltage voltage declared by the manufacturer at which the valve may be operated 3.117 rated current current declared by the manufacturer at which the valve may be operated 3.118 bypass passage, provided in the body of the device or in a
47、 gas line around the body, which permits a gas flow from the inlet to the outlet connections of the device entirely independent of the action of the valve 3.119 interlock control or device to prove the physical state of a required condition, and to furnish proof to the automatic gas ignition system
48、or other safety control circuit 3.120 proof-of-closure switch electrical switch which monitors the closed position of the valve closure member and which is used as an interlock 3.121 switching device electrical switch actuated by the valve actuator and used as an electrical output 3.122 valve actuat
49、or electrically operated mechanism (for example an electric motor, or stepping solenoid), an electro-thermal device (for example the heating element of an energy regulator) or a mechanical storage device (for example a clockwork spring), used to effect the opening action of a valve 3.123 Commercial / industrial valve C/I Valve a normally closed automatic or semi-automatic shut-off valve having an operating pressure greater than 3,5 kPa
