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1、BRITISH STANDARD BS EN 161:2007 Automatic shut-off valves for gas burners and gas appliances ICS 23.060.40; 27.060.20 ? BS EN 161:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 BSI 2008 ISBN 978 0 580 55538 1 National f
2、oreword This British Standard is the UK implementation of EN 161:2007. It supersedes BS EN 161:2002 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GSE/22, Safety and control devices for gas and oil burners and gas burning appliances. A list of organi
3、zations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligati
4、ons. Amendments/corrigenda issued since publication DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 161 January 2007 ICS 23.060.40Supersedes EN 161:2001 English Version Automatic shut-off valves for gas burners and gas appliances Robinets automatiques de sectionnement pour brleurs
5、gaz et appareils gaz Automatische Absperrventile fr Gasbrenner und Gasgerte This European Standard was approved by CEN on 8 December 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nation
6、al standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in an
7、y other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Es
8、tonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EU
9、ROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 161:2007: E EN 161:2007 (E) 2 Contents Page 1Scope 4 2Normative references4 3Terms and definiti
10、ons .5 4Classification7 5Units of measurement and test conditions.7 6Construction requirements.8 7Performance requirements.13 8EMC/Electrical requirements21 9Marking, installation and operating instructions .22 Annex A (informative) Gas connections in common use in the various countries25 Annex B (i
11、nformative) Leak-tightness test volumetric method .26 Annex C (informative) Leak-tightness test pressure loss method 27 Annex D (normative) Conversion of pressure loss into leakage rate28 Annex E (informative) Additional requirements coming from EU Directive 97/23/EC29 Annex ZA (informative) Relatio
12、nship between this European Standard and the Essential Requirements of EU Directive 90/396/EEC30 Bibliography32 ? EN 161:2007 (E) 3 Foreword This document (EN 161:2007) has been prepared by Technical Committee CEN/TC 58 “ Safety and control devices for gas-burners and gas-burning appliances” , the s
13、ecretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2007, and conflicting national standards shall be withdrawn at the latest by July 2007. This document super
14、sedes EN 161:2001. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of th
15、is document. This European Standard is intended to be used in conjunction with prEN 13611:2005, Safety and control devices for gas burners and gas-burning appliances General requirements. This control standard refers to clauses of prEN 13611:2005 or adapting it by stating “ Addition” , “ Modificatio
16、n” or “ Replacement” in the corresponding clause. It introduces requirements for balanced valves and a method for the assessment of other means for closing and/or sealing in automatic shut-off valves. SIL classification according to EN 61508 cannot be claimed based upon compliance with this standard
17、. Valves with SIL classification do not meet automatically the requirements of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Re
18、public, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. ? EN 161:2007 (E) 4 1 Scope This European Standard sp
19、ecifies the safety, construction and performance requirements for automatic shut- off valves for gas burners, gas appliances and similar use, hereafter referred to as valves. This European Standard covers type testing only. It applies to valves with declared maximum inlet pressures up to and includi
20、ng 5 bar, for use on burners or in appliances using fuel gases of the first, second, and third families. It applies to electrically operated valves and to valves actuated by fluids where the control valves for these fluids are actuated electrically, but not to any external electrical devices for swi
21、tching the control signal or actuating energy. An assessment method for valve designs is given by this European Standard. It also applies to valves where the flow rate is controlled by external electrical signals, either in discrete steps or proportional to the applied signal. It also applies to val
22、ves fitted with closed position indicator switches. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including
23、 any amendments) applies. EN 30 (all parts), Domestic cooking appliances burning gas fuel EN 298, Automatic gas burner control systems for gas burners and gas burning appliances with or without fans prEN 13611:2005, Safety and control devices for gas burners and gas-burning appliances General requir
24、e- ments EN 13906-1, Cylindrical helical springs made from round wire and bar Calculation and design Part 1: Compression springs EN 13906-2, Cylindrical helical springs made from round wire and bar Calculation and design Part 2: Extension springs EN 60529, Degrees of protection provided by enclosure
25、s (IP code) (IEC 60529:1989) EN 60730-1:2000, Automatic electrical controls for household and similar use Part 1: General requirements (IEC 60730-1:1999, modified) EN 61058-1, Switches for appliances - Part 1: General requirements (IEC 61058-1:2000 + A1:2001, modified) ISO 4400, Fluid power systems
26、and components - 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 ? EN 161:2007 (E) 5 3 Terms and definitions For the purposes
27、 of this document, the terms and definitions given in prEN 13611:2005 and the following apply. 3.1 automatic shut-off valve valve which opens when energized and closes automatically when de-energized 3.2 closure member according to prEN 13611:2005, 3.2 3.3 actuating mechanism part of the valve which
28、 moves the closure member 3.4 external leak-tightness according to prEN 13611:2005, 3.4 3.5 internal leak-tightness according to prEN 13611:2005, 3.5 3.6 inlet pressure according to prEN 13611:2005, 3.6 3.7 outlet pressure according to prEN 13611:2005, 3.7 3.8 pressure difference according to prEN 1
29、3611:2005, 3.8 3.9 maximum inlet pressure according to prEN 13611:2005, 3.9 3.10 minimum inlet pressure according to prEN 13611:2005, 3.10 3.11 flow rate according to prEN 13611:2005, 3.11 3.12 rated flow rate according to prEN 13611:2005, 3.12 3.13 maximum ambient temperature according to prEN 1361
30、1:2005, 3.13 ? EN 161:2007 (E) 6 3.14 minimum ambient temperature according to prEN 13611:2005, 3.14 3.15 mounting position according to prEN 13611:2005, 3.15 3.16 valve with step control valve which controls the flow rate in steps 3.17 valve with modulating control valve which controls the flow rat
31、e continuously between two limits in response to external electrical signals 3.18 closed position indicator switch switch fitted to a valve which indicates when the closure member is in the closed position 3.19 actuating energy required energy for the actuating mechanism to move the closure member t
32、o the open position NOTE The actuating energy can have an external source (electrical, pneumatic or hydraulic) and can be transformed inside the valve. 3.20 opening force force required to move the closure member to the open position 3.21 closing force force available to close the valve, independent
33、 of any force provided by fuel gas pressure 3.22 sealing force force acting on the valve seat when the closure member is in the closed position, independent of any force provided by fuel gas pressure 3.23 frictional force largest force required to move the actuating mechanism and the closure member
34、from the open position to the closed position with the closure spring removed, independent of any force provided by fuel gas pressure 3.24 actuating pressure hydraulic or pneumatic pressure supplied to the actuating mechanism of the valve 3.25 opening time time interval between energizing the valve
35、and the attainment of the maximum or other defined flow rate 3.26 closing time time interval between de-energizing the valve and the closure member attaining the closed position ? EN 161:2007 (E) 7 3.27 delay time time interval between energizing the valve and the start of flow 3.28 control valve va
36、lve which controls the fluid (e. g. compressed air) supplied to the actuating mechanism 3.29 rated voltage voltage declared by the manufacturer at which the valve may be operated 3.30 rated current current declared by the manufacturer at which the valve may be operated 3.31 balanced valve valve with
37、 a balanced closure member where the inlet pressure acts on the closure member in the opening and closing direction NOTE The closure member may close more than one opening. 4 Classification 4.1 Classes of valve Class A, B and C valves Valves where the sealing force is not decreased by the gas inlet
38、pressure. They are classified A, B or C according to the sealing force requirements of 7.13. Balanced valves according to this standard are class A valves. Class D valves Valves which are not subject for requirements for the sealing force and fixed closing time. NOTE Class D valves are intended to b
39、e used for control functions only. Class J valves Disc-on-seat valves where the sealing force is not decreased by the gas inlet pressure and which meet the requirements of 7.13. 4.2 Groups of valve According to prEN 13611:2005, 4.2 4.3 Classes of control functions, safety classes According to prEN 1
40、3611:2005, 4.3 5 Units of measurement and test conditions According to prEN 13611:2005, Clause 5 ? EN 161:2007 (E) 8 6 Construction requirements 6.1 General According to prEN 13611:2005, 6.1 6.2 Mechanical parts of valves 6.2.1 Appearance According to prEN 13611:2005, 6.2.1 6.2.2 Holes According to
41、prEN 13611:2005, 6.2.2 6.2.3 Breather holes According to prEN 13611:2005, 6.2.3 6.2.4 Test for leakage of breather holes According to prEN 13611:2005, 6.2.4 6.2.5 Screwed fastenings According to prEN 13611:2005, 6.2.5 6.2.6 Jointing According to prEN 13611:2005, 6.2.6 6.2.7 Moving parts According to
42、 prEN 13611:2005, 6.2.7 6.2.8 Sealing caps According to prEN 13611:2005, 6.2.8 6.2.9 Dismantling and reassembly According to prEN 13611:2005, 6.2.9 6.2.10 Design There shall be no exposed shafts or operating levers which could adversely affect the ability of valves to close. 6.2.11 Closed position i
43、ndicator switch Closed position indicator switches, where fitted, shall not impair the correct operation of valves. Adjusters shall be sealed to indicate interference. Any drift of the switch and actuating mechanism from its setting shall not impair correct valve operation. EN 161:2007 (E) 9 6.2.12
44、Valve with modulating control Flow rates of valves with modulating control shall be adjustable over the full range declared by the manufacturer. If the adjustment of one flow rate affects the setting of any other flow rate, this shall be clearly indicated in the manufacturers instructions for settin
45、g up. The setting of any flow rate shall require the use of mechanical or electrical tools and shall be designed to discourage unauthorized adjustment. NOTE For air-gas ratio controls see EN 12067-1 and -2. 6.2.13 Controls assembled to a valve Other controls assembled to a valve shall not interfere
46、with its shut-off function. 6.2.14 Balanced valves The closure member of a balanced valve shall have a resulting force in the closing direction where the sealing force is not decreased by the gas inlet pressure. 6.2.15 Closing and sealing 6.2.15.1 Closing and/or sealing by means of springs If spring
47、s are used for closing and/or sealing the valve, they shall be designed to EN 13906-1 or EN 13906-2 for static and dynamic loading. 6.2.15.2 Other means for closing and/or sealing 6.2.15.2.1 General This clause defines a method for the assessment of other means for closing and sealing in automatic s
48、hut-off valves. By this clause the term “ safety class A, B or C” is not related to the sealing force classes but to the safety classes as described in 4.3. Sealing force of valves shall be classified according to 4.1. The basic risks of fire and explosion in a gas appliance as a result of uncontrol
49、led gas flow requires a safety class C system for the gas shut-off function. This is based on a comparison, made between automatic burner controller and gas shut-off function, the safety class of each of them being considered equal. Although this European Standard is not based on a fault assessment approach as described in 6.6 of prEN 13611:2005, the combination of two automatic shut-off valves is conside