Automatic vent valves for gas burners and gas burning appliances

EN 13611:2019, Clause 1 applies with the following modification and addition:
Modification:
The 1st paragraph of EN 13611:2019, Clause 1 is replaced by:
This document specifies the safety, design, construction, and performance requirements and testing for automatic vent valves for burners and appliances burning one or more gaseous fuels, hereafter referred to as “valves”.
This document is applicable to valves with declared maximum inlet pressures up to and including 500 kPa and of nominal connection sizes up to and including DN 100.
Addition:
This document is applicable to:
-   electrically actuated valves;
-   valves actuated by fluids where the control valves for these fluids are actuated electrically, but not to any external electrical devices for switching the control signal or actuating energy;
-   valves fitted with open position indicator switches.
The 4th paragraph of EN 13611:2019, Clause 1 is removed.

Automatische Abblaseventile für Gasbrenner und Gasgerät

Dieses Dokument legt die Sicherheits-, Bau- und Funktionsanforderungen an automatische Abblaseventile zur Verwendung mit Gasbrennern, Gasgeräten und ähnlichen Anwendungen, nachstehend Ventile genannt, fest.
Dieses europäische Dokument gilt für:
— Ventile mit angegebenen höchsten Eingangsdrücken bis einschließlich 500 kPa (5 bar) und Nennweiten bis einschließlich DN 100, die für die Verwendung mit einem oder mehreren Brenngas(en) nach EN 437:2003+A1:2009 ausgelegt sind;
— elektrisch betriebene Ventile;
— Ventile, die durch Steuermedien angesteuert werden, wenn die Steuerventile für diese Medien elektrisch geschaltet werden; sie gilt nicht für externe elektrische Schalter, die das Steuersignal oder die Stellantriebsenergie beeinflussen;
— Ventile mit Meldeschaltern für die Offenstellung.
ANMERKUNG Bestimmungen für die Prüfung von Endprodukten durch den Hersteller sind nicht festgelegt.

Robinets d'évent automatiques pour brûleurs à gaz et appareils à gaz

L’article 1 de la norme EN13611 :2019 s’applique avec la modification et l’addition suivantes :
Modification :
Le 1er paragraphe de l’article 1 de la norme EN13611 :2019 est remplacé par ce qui suit :
Le présent document spécifie les exigences de sécurité, de construction et de fonctionnement ainsi que les essais applicables aux robinets d'évent automatiques pour brûleurs à gaz, appareils à gaz et similaires, dénommés ci-après « robinets ».
Ce document est applicable aux robinets dont la pression amont maximale déclarée est inférieure ou égale à 500 kPa, de diamètres nominaux de raccordement inférieurs ou égaux à DN 100.
Addition :
Le présent document s'applique :
-   aux robinets de sectionnement commandés électriquement ;
-   aux robinets de sectionnement actionnés par des fluides où les vannes de commande de ces fluides sont commandées électriquement, mais en aucun cas aux dispositifs électriques externes commutant le signal de commande ou l'énergie motrice de commande ;
-   aux robinets équipés de contacts indicateurs de position d'ouverture.
Le 4ième paragraphe de l’article 1 de la EN 13611 :2019 est supprimé.

Avtomatski varnostno izpustni ventili za plinske gorilnike in plinske aparate

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
07-Feb-2022

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SLOVENSKI STANDARD
SIST EN 16304:2022
01-december-2022
Nadomešča:
SIST EN 16304:2014
Avtomatski varnostno izpustni ventili za plinske gorilnike in plinske aparate
Automatic vent valves for gas burners and gas burning appliances
Automatische Abblaseventile für Gasbrenner und Gasgerät
Robinets d'évent automatiques pour brûleurs à gaz et appareils à gaz
Ta slovenski standard je istoveten z: EN 16304:2022
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 16304:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 16304:2022
---------------------- Page: 2 ----------------------
SIST EN 16304:2022
EN 16304
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 23.060.40 Supersedes EN 16304:2013
English Version
Automatic vent valves for gas burners and gas burning
appliances

Robinets d'évent automatiques pour brûleurs à gaz et Automatische Abblaseventile für Gasbrenner und

appareils à gaz Gasgerät
This European Standard was approved by CEN on 1 August 2022.

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 national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16304:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 16304:2022
EN 16304:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 6

Introduction .................................................................................................................................................................... 7

1 Scope ................................................................................................................................................................ 9

2 Normative references ................................................................................................................................ 9

3 Terms and definitions ............................................................................................................................. 10

4 Classification .............................................................................................................................................. 11

4.1 Classes of control ...................................................................................................................................... 11

4.2 Groups of control ...................................................................................................................................... 11

4.3 Classes of control functions .................................................................................................................. 11

4.4 Types of DC supplied controls .............................................................................................................. 11

5 Test conditions and uncertainty of measurements ..................................................................... 11

6 Design and construction ........................................................................................................................ 11

6.1 General ......................................................................................................................................................... 11

6.2 Mechanical parts of the control ........................................................................................................... 11

6.2.1 Appearance ................................................................................................................................................. 11

6.2.2 Holes .............................................................................................................................................................. 11

6.2.3 Breather holes ........................................................................................................................................... 11

6.2.4 Screwed fastenings .................................................................................................................................. 12

6.2.5 Jointing ......................................................................................................................................................... 12

6.2.6 Moving parts ............................................................................................................................................... 12

6.2.7 Sealing caps ................................................................................................................................................ 12

6.2.8 Dismantling and reassembly ................................................................................................................ 12

6.2.9 Auxiliary canals and orifices ................................................................................................................ 12

6.2.10 Presetting device ...................................................................................................................................... 12

6.2.101 Design ........................................................................................................................................................... 12

6.2.102 Open position indicator switch ........................................................................................................... 12

6.2.103 Controls assembled to a valve .............................................................................................................. 12

6.3 Materials ...................................................................................................................................................... 12

6.3.1 General material requirements .......................................................................................................... 12

6.3.2 Housing ........................................................................................................................................................ 12

6.3.3 Zinc alloys .................................................................................................................................................... 12

6.3.4 Springs .......................................................................................................................................................... 12

6.3.5 Resistance to corrosion and surface protection............................................................................ 13

6.3.6 Impregnation ............................................................................................................................................. 13

6.3.7 Seals for glands for moving parts ....................................................................................................... 13

6.3.101 Springs providing opening force ......................................................................................................... 13

6.3.102 Closure members ...................................................................................................................................... 13

6.4 Gas connections......................................................................................................................................... 13

6.4.1 Making connections ................................................................................................................................. 13

6.4.2 Connection sizes ....................................................................................................................................... 13

6.4.3 Threads ........................................................................................................................................................ 13

6.4.4 Union joints ................................................................................................................................................ 13

6.4.5 Flanges .......................................................................................................................................................... 13

6.4.6 Compression fittings ............................................................................................................................... 13

6.4.7 Nipples for pressure test........................................................................................................................ 13

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SIST EN 16304:2022
EN 16304:2022 (E)

6.4.8 Strainers ....................................................................................................................................................... 14

6.5 Electrical parts of the control ............................................................................................................... 14

6.5.1 General .......................................................................................................................................................... 14

6.5.2 Switching elements .................................................................................................................................. 14

6.5.3 Electrical components ............................................................................................................................. 14

6.6 Protection against internal faults for the purpose of functional safety ................................ 14

6.101 Pneumatic and hydraulic actuating mechanisms ......................................................................... 14

7 Performance ............................................................................................................................................... 14

7.1 General .......................................................................................................................................................... 14

7.2 Leak-tightness ............................................................................................................................................ 15

7.3 Torsion and bending ................................................................................................................................ 15

7.4 Rated flow rate ........................................................................................................................................... 15

7.5 Durability ..................................................................................................................................................... 15

7.6 Performance tests for electronic controls ....................................................................................... 15

7.7 Long-term performance for electronic controls ............................................................................ 15

7.8 Data exchange ............................................................................................................................................ 15

7.101 Opening function ....................................................................................................................................... 15

7.101.1 Requirement ............................................................................................................................................... 15

7.101.2 Test of opening function ......................................................................................................................... 15

7.102 Opening force ............................................................................................................................................. 16

7.102.1 Requirement ............................................................................................................................................... 16

7.102.2 Test of opening force ............................................................................................................................... 16

7.103 Opening time .............................................................................................................................................. 16

7.103.1 Requirement ............................................................................................................................................... 16

7.103.2 Test of opening time ................................................................................................................................ 16

7.104 Delay time and closing time .................................................................................................................. 16

7.104.1 Requirement ............................................................................................................................................... 16

7.104.2 Test of delay time and closing time .................................................................................................... 16

7.105 Open position indicator switch ............................................................................................................ 17

7.105.1 Requirement ............................................................................................................................................... 17

7.105.2 Test of open position indicator switch .............................................................................................. 17

7.106 Endurance .................................................................................................................................................... 17

7.106.1 Requirement ............................................................................................................................................... 17

7.106.2 Endurance test ........................................................................................................................................... 17

7.106.3 Endurance test for open position indicator switch ...................................................................... 18

8 Electrical requirements .......................................................................................................................... 18

8.1 General .......................................................................................................................................................... 18

8.2 Protection by enclosure .......................................................................................................................... 18

8.101 Switches ........................................................................................................................................................ 19

8.102 Plug connections ....................................................................................................................................... 19

8.103 Power saving circuits............................................................................................................................... 19

8.103.1 Closing of the valve ................................................................................................................................... 19

8.103.2 Overheating ................................................................................................................................................. 19

8.103.3 Test of power-saving circuits ................................................................................................................ 19

9 Electromagnetic compatibility (EMC)................................................................................................ 20

9.1 Protection against environmental influences ................................................................................ 20

9.2 Supply voltage variations below 85 % of rated voltage .............................................................. 20

9.3 Voltage dips and interruptions ............................................................................................................ 20

9.3.1 Requirements ............................................................................................................................................. 20

9.3.2 Test ................................................................................................................................................................. 20

9.4 Supply frequency variations ................................................................................................................. 20

9.5 Surge immunity test ................................................................................................................................. 20

---------------------- Page: 5 ----------------------
SIST EN 16304:2022
EN 16304:2022 (E)

9.6 Electrical fast transient/burst ............................................................................................................. 20

9.7 Immunity to conducted disturbances induced by radio frequency fields ........................... 20

9.8 Immunity to radiated disturbances induced by radio frequency fields ............................... 20

9.9 Electrostatic discharge tests ................................................................................................................. 20

9.10 Power frequency magnetic field immunity tests .......................................................................... 20

9.11 Harmonics and interharmonics including mains signalling at a.c. power port, low

frequency immunity tests...................................................................................................................... 20

10 Marking, instructions .............................................................................................................................. 21

10.1 Marking ........................................................................................................................................................ 21

10.2 Instructions ................................................................................................................................................ 21

10.3 Warning notice .......................................................................................................................................... 22

Annex A (informative) Abbreviations and symbols ........................................................................................ 23

Annex B (informative) Leak-tightness test for gas controls – volumetric method .............................. 24

Annex C (informative) Leak-tightness test for gas controls – pressure loss method ......................... 25

Annex D (normative) Calculation of pressure loss into leakage rate ....................................................... 26

Annex E (normative) Electrical/electronic component fault modes ........................................................ 27

Annex F (normative) Additional requirements for safety accessories and pressure

accessories as defined in EU Directive 2014/68/EU ................................................................... 28

Annex G (normative) Materials for pressurized parts................................................................................... 29

Annex H (normative) Additional materials for pressurized parts ............................................................ 30

Annex I (normative) Requirements for controls used in DC supplied burners and appliances

burning gaseous or liquid fuels ........................................................................................................... 31

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ........................ 32

Annex K (normative) Method for the determination of a Performance Level (PL) ............................ 33

K.1 Scope ............................................................................................................................................................. 33

K.2 Normative references ............................................................................................................................. 33

K.3 Terms and definitions ............................................................................................................................. 33

K.4 Performance ............................................................................................................................................... 33

K.4.1 Operation mode ........................................................................................................................................ 33

K.4.2 PL and field data evaluation ................................................................................................................. 33

K.4.3 Hardware failure tolerance (HFT) ..................................................................................................... 33

K.4.4 Common cause failure (CCF) ................................................................................................................ 33

K.4.4.1 General ......................................................................................................................................................... 33

K.4.4.2 Estimation of effect of CCF ..................................................................................................................... 33

K.4.5 Safe failure fraction (SFF) ...................................................................................................................... 34

K.4.6 Determination of the B value ......................................................................................................... 34

10d

K.4.6.1 Requirements ............................................................................................................................................ 34

K.4.6.2 Tests .............................................................................................................................................................. 34

K.4.7 Determination of Performance Level (PL) ...................................................................................... 35

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SIST EN 16304:2022
EN 16304:2022 (E)

K.4.8 PFH values for structures consisting of two controls ................................................................ 35

K.5 Marking, instructions .............................................................................................................................. 35

K.5.1 Marking......................................................................................................................................................... 35

K.5.2 Instructions ................................................................................................................................................. 35

K.5.3 Warning notice ........................................................................................................................................... 35

Annex L (informative) Relationship between Safety Integrity Level (SIL) and

Performance Level (PL) .......................................................................................................................... 36

Annex M (normative) Reset functions ................................................................................................................ 37

Annex N (informative) Guidance document on Environmental Aspects ............................................... 38

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ...................................... 39

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Regulation (EU) 2016/426 aimed to be covered ......................................... 40

Bibliography ................................................................................................................................................................. 43

---------------------- Page: 7 ----------------------
SIST EN 16304:2022
EN 16304:2022 (E)
European foreword

This document (EN 16304:2022) has been prepared by Technical Committee CEN/TC 58 “Safety and

control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat 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 April 2023, and conflicting national standards shall be

withdrawn at the latest by October 2025.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 16304:2013.

The following significant changes compared to the previous edition have been incorporated in this

document:
a) alignment with EN 13611:2019;
b) requirements from EU Directive 2014/68/EU were not adopted;
c) terms and definitions are aligned with EN 13611:2019;
d) reference to EN 437 removed;
e) clause “Electronic component – sensing element” is not applicable;

f) clause “Protection against internal faults for the purpose of functional safety” is not applicable;

g) information on lifetime for safe function (designed lifetime) added to instructions.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part

of this document.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United

Kingdom.
---------------------- Page: 8 ----------------------
SIST EN 16304:2022
EN 16304:2022 (E)
Introduction
This document is intended to be used in conjunction with EN 13611:2019.

EN 13611:2019 recognizes the safety level specified by CEN/TC 58 and is regarded as a horizontal

standard dealing with the safety, construction, performance and testing of controls for burners and

appliances burning gaseous and/or liquid fuels.

The general requirements for controls are given in EN 13611:2019, and methods for classification and

assessment for new controls and control functions are given in EN 14459:2021 (see Figure 1).

EN 126:2012 (see Figure 1) specifies multifunctional controls combining two or more controls and

Application Control Functions, one of which is a mechanical control function. The requirements for

controls and Application Control Functions are given in the specific control standard (see Figure 1,

control functions).
Figure 1 — Interrelation of control standards

EN 13611:2019 should be used in conjunction with the specific standard for a specific type of control (e.g.

EN 88-1:2022, EN 88-2:2022, EN 88-3:2022, EN 125:2022, EN 126:2012, EN 161:2022, EN 257:2022,

EN 298:2022, EN 1106:2022, EN 1643:2022, EN 1854:— , EN 12067-2:2022, EN 16304:2022,

EN 16340:2014, EN 16678:2022 and EN 16898:2022), or for controls for specific applications.

EN 13611:2019 can also be applied, so far as reasonable, to controls not mentioned in a specific standard

and to controls designed on new principles, in which case additional requirements can be necessary.

EN 14459:2021 provides methods for classification and assessment of new control principles.

Primarily in industrial applications it is common practice to rate the safety of a plant based on values

describing the likelihood of a dangerous failure. These values are being used to determin

...

SLOVENSKI STANDARD
oSIST prEN 16304:2020
01-maj-2020
Samodejni varnostno izpustni ventili za plinske gorilnike in plinske aparate
Automatic vent valves for gas burners and gas burning appliances
Automatische Abblaseventile für Gasbrenner und Gasgerät
Robinets d'évent automatiques pour brûleurs à gaz et appareils à gaz
Ta slovenski standard je istoveten z: prEN 16304
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 16304:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 16304:2020
---------------------- Page: 2 ----------------------
oSIST prEN 16304:2020
DRAFT
EUROPEAN STANDARD
prEN 16304
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 23.060.40 Will supersede EN 16304:2013
English Version
Automatic vent valves for gas burners and gas burning
appliances

Robinets d'évent automatiques pour brûleurs à gaz et Automatische Abblaseventile für Gasbrenner und

appareils à gaz Gasgerät

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 58.

If this draft becomes a European Standard, 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 national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16304:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 16304:2020
prEN 16304:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

1 Scope ................................................................................................................................................................ 6

2 Normative references ................................................................................................................................ 6

3 Terms and definitions ................................................................................................................................ 7

4 Classification ................................................................................................................................................. 8

4.1 Classes of control ......................................................................................................................................... 8

4.2 Groups of control ......................................................................................................................................... 8

4.3 Classes of control functions ..................................................................................................................... 8

4.4 Types of DC supplied controls ................................................................................................................ 8

5 Test conditions and uncertainty of measurements ........................................................................ 8

6 Construction requirements ..................................................................................................................... 8

6.1 General ............................................................................................................................................................ 8

6.2 Mechanical parts of the control .............................................................................................................. 8

6.2.1 Appearance .................................................................................................................................................... 8

6.2.2 Holes ................................................................................................................................................................. 9

6.2.3 Breather holes .............................................................................................................................................. 9

6.2.4 Screwed fastenings ..................................................................................................................................... 9

6.2.5 Jointing ............................................................................................................................................................ 9

6.2.6 Moving parts .................................................................................................................................................. 9

6.2.7 Sealing caps ................................................................................................................................................... 9

6.2.8 Dismantling and reassembly ................................................................................................................... 9

6.2.9 Auxiliary channels and orifices .............................................................................................................. 9

6.2.10 Pre-setting device ........................................................................................................................................ 9

6.2.101 Design .............................................................................................................................................................. 9

6.2.102 pen position indicator switch ................................................................................................................. 9

6.2.103 Controls assembled to a valve ................................................................................................................. 9

6.3 Materials ...................................................................................................................................................... 10

6.3.1 General material requirements .......................................................................................................... 10

6.3.2 Housing ........................................................................................................................................................ 10

6.3.3 Zinc alloys .................................................................................................................................................... 10

6.3.4 Springs .......................................................................................................................................................... 10

6.3.5 Resistance to corrosion and surface protection............................................................................ 10

6.3.6 Impregnation ............................................................................................................................................. 10

6.3.7 Seals for glands for moving parts ....................................................................................................... 10

6.3.101 Springs providing opening force ......................................................................................................... 10

6.3.102 Closure members ...................................................................................................................................... 10

6.4 Gas connections......................................................................................................................................... 10

6.4.1 Making connections ................................................................................................................................. 10

6.4.2 Connection sizes ....................................................................................................................................... 10

6.4.3 Threads ........................................................................................................................................................ 11

6.4.4 Union joints ................................................................................................................................................ 11

6.4.5 Flanges .......................................................................................................................................................... 11

6.4.6 Compression fittings ............................................................................................................................... 11

6.4.7 Nipples for pressure test........................................................................................................................ 11

6.4.8 Strainers ...................................................................................................................................................... 11

6.5 Electrical parts of controls .................................................................................................................... 11

---------------------- Page: 4 ----------------------
oSIST prEN 16304:2020
prEN 16304:2020 (E)

6.6 Protection against internal faults for the purpose of functional safety ................................ 11

6.101 Pneumatic and hydraulic actuating mechanisms ......................................................................... 11

7 Performance ............................................................................................................................................... 11

7.1 General .......................................................................................................................................................... 11

7.2 Leak-tightness ............................................................................................................................................ 12

7.3 Torsion and bending ................................................................................................................................ 12

7.4 Rated flow rate ........................................................................................................................................... 12

7.5 Durability ..................................................................................................................................................... 12

7.6 Performance test for electronic controls ......................................................................................... 12

7.7 Long-term performance for electronic controls ............................................................................ 12

7.101 Opening function concerning residual magnetism....................................................................... 12

7.101.1 Requirement ............................................................................................................................................... 12

7.101.2 Test of opening function ......................................................................................................................... 12

7.102 Opening force ............................................................................................................................................. 13

7.102.1 Requirement ............................................................................................................................................... 13

7.102.2 Test of opening force ............................................................................................................................... 13

7.103 Opening time .............................................................................................................................................. 13

7.103.1 Requirement ............................................................................................................................................... 13

7.103.2 Test of opening time ................................................................................................................................ 13

7.104 Delay time and closing time .................................................................................................................. 13

7.104.1 Requirement ............................................................................................................................................... 13

7.104.2 Test of delay time and closing time .................................................................................................... 14

7.105 Open position indicator switch ............................................................................................................ 14

7.105.1 Requirement ............................................................................................................................................... 14

7.105.2 Test of open position indicator switch .............................................................................................. 14

7.106 Endurance .................................................................................................................................................... 14

7.106.1 Requirement ............................................................................................................................................... 14

7.106.2 Endurance test ........................................................................................................................................... 14

7.106.3 Endurance test for open position indicator switch ...................................................................... 15

8 Electrical requirements .......................................................................................................................... 15

8.1 General .......................................................................................................................................................... 15

8.2 Protection by enclosure .......................................................................................................................... 15

8.101 Switches ........................................................................................................................................................ 16

8.102 Plug connections ....................................................................................................................................... 16

8.103 Power saving circuits............................................................................................................................... 16

8.103.1 Opening of the valve ................................................................................................................................. 16

8.103.2 Overheating ................................................................................................................................................. 16

8.103.3 Test of power-saving circuits ................................................................................................................ 16

9 EMC/Electrical requirements ............................................................................................................... 17

9.1 Protection against environmental influences ................................................................................ 17

9.2 Supply voltage variations below 85 % of rated voltage .............................................................. 17

9.3 Short term voltage interruptions and decreases .......................................................................... 17

9.4 Supply frequency variations ................................................................................................................. 17

9.5 Surge immunity test ................................................................................................................................. 17

9.6 Electrical fast transient/burst .............................................................................................................. 17

9.7 Immunity to conducted disturbances ................................................................................................ 17

9.8 Immunity to radiated fields .................................................................................................................. 17

9.9 Electrostatic discharge immunity test............................................................................................... 17

9.10 Power frequency magnetic field immunity test ............................................................................. 17

10 Marking, installation and operating instructions ......................................................................... 18

10.1 Marking......................................................................................................................................................... 18

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10.2 Installation and operating instructions ........................................................................................... 19

10.3 Warning notice .......................................................................................................................................... 19

Annex A (informative) Gas connections in common use in the various countries ............................ 20

Annex B (informative) Leak-tightness test – volumetric method ............................................................ 21

Annex C (informative) Leak-tightness test – pressure loss method ....................................................... 22

Annex D (normative) Conversion of pressure loss into leakage rate ..................................................... 23

Annex E (normative) Electrical/electronic component fault modes ...................................................... 24

Annex F (normative) Additional requirements for safety accessories and pressure

accessories as defined in EU Directive 2014/68/EU ................................................................... 25

Annex G (normative) Materials for pressurised parts ................................................................................. 26

Annex H (informative) Additional materials for pressurised parts ....................................................... 27

Annex I (normative) Requirements for controls used in DC supplied gas burners and gas

burning appliances .................................................................................................................................. 28

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ...................... 29

Annex K (normative) Method for the determination of a Performance Level (PL)........................... 30

K.1 Scope ............................................................................................................................................................. 30

K.2 Normative references ............................................................................................................................. 30

K.3 Terms and definitions ............................................................................................................................. 30

K.4 Performance ............................................................................................................................................... 30

K.4.1 Operation mode ........................................................................................................................................ 30

K.4.2 PL and field data evaluation ................................................................................................................. 30

K.4.3 Hardware failure tolerance (HFT) ..................................................................................................... 30

K.4.4 Common cause failure (CCF) ................................................................................................................ 30

K.4.5 Safe failure fraction (SFF) ...................................................................................................................... 31

K.4.6 Determination of the B value ........................................................................................................ 31

10d

K.4.7 Determination of Performance Level (PL) ...................................................................................... 32

K.4.8 PFH values for structures consisting of two controls ............................................................... 32

K.5 Marking, installation and operating instructions......................................................................... 32

K.5.1 Marking ........................................................................................................................................................ 32

K.5.2 Installation and operating instructions ........................................................................................... 32

K.5.3 Warning notice .......................................................................................................................................... 32

Annex L (informative) Relationship between Safety Integrity Level (SIL) and

Performance Level (PL) ......................................................................................................................... 33

Annex M (normative) Reset functions ............................................................................................................... 34

Annex N (informative) Guidance document on environmental aspects ............................................... 35

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ...................................... 36

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Regulation (EU) 2016/426 aimed to be covered ......................................... 37

Annex ZB (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/68/EU aimed to be covered ................................................. 39

Bibliography ................................................................................................................................................................. 43

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European foreword

This document (prEN 16304:2020) has been prepared by Technical Committee CEN/TC 58 “Safety and

control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is

held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 16304:2013.

This document has been prepared under a standardization request 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 and ZB, which are an integral part of

this document.

This document is intended to be used in conjunction with EN 13611:2019. This document refers to

clauses of EN 13611:2019 or adapts clauses by stating “with the following modification”, “with the

following addition”, “is replaced by the following” or "is not applicable" in the corresponding clause.

This document adds clauses or sub clauses to the structure of EN 3611:2018 which are particular to this

standard. Subclauses which are additional to those in EN 13611:2015 are numbered starting from 101.

Additional Annexes are designed as Annex AA, BB, CC, etc.

Safety Integrity Level (SIL) classification according to EN 61508 (all parts) cannot be claimed based

upon compliance with this standard. Vent valves with SIL classification do not meet automatically the

requirements of this standard.
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1 Scope

This document specifies the safety, construction and performance requirements for automatic vent

valves for use with gas burners, gas appliances and similar use, hereafter referred to as ‘valves’.

This European document applicable to:

— valves with declared maximum inlet pressures up to and including 500 kPa (5 bar) of nominal

connection sizes up to and including DN 100 for use with one or more fuel gases in accordance with

EN 437:2003+A1:2009;
— electrically operated valves;

— valves actuated by fluids where the control valves for these fluids are actuated electrically, but not

to any external electrical devices for switching the control signal or actuating energy;

— valves fitted with open position indicator switches.

NOTE Provisions for final product inspection and testing by the manufacturer are not specified.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 13611:2019, Safety and control devices for gas burners and gas-burning appliances — General

requirements

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 60730-1:2011, Automatic electrical controls for household and similar use — Part 1: General

requirements (IEC 60730-1:2010, modified)
EN 61058-1, Switches for appliances — Part 1: General requirements (IEC 61058-1)

EN 175301-803, Detail Specification: Rectangular connectors — Flat contacts, 0,8 mm thickness, locking

screw not detachable
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3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 13611:2019 and the following

apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.101
automatic vent valve
device which closes when energised and opens automatically when de-energised
3.102
actuating mechanism
part of the valve which moves the closure member
3.103
open position indicator switch

device fitted to a valve which indicates when the closure member is in the open position

3.104
actuating energy

required energy for the actuating mechanism to move the closure member to the closed position

Note 1 to entry: The actuating energy can have an external source (electrical, pneumatic or hydraulic) and can

be transformed inside the valve.
3.105
opening force

force required to open the valve, independent of any force provided by fuel gas pressure

3.106
frictional force

largest force required to move the actuating mechanism and the closure member from the closed

position to the open position with the opener spring removed, independent of any force provided by

fuel gas pressure
3.107
actuating pressure
hydraulic or pneumatic pressure supplied to the actuating mechanism of the valve
3.108
opening time

time interval between de-energising the valve and the closure member attaining the open position

3.109
closing time

time interval between energising the valve and the closure member attaining the closed position

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3.110
delay time

time interval between energising the valve and the start of the closure member moving to the closed

position
3.111
control valve

device which controls the fluid (e.g. compressed air) supplied to the actuating mechanism

3.112
rated voltage

voltage as stated in the installation and operating instructions at which the valve may be operated

3.113
rated current

current as stated in the installation and operating instructions at which the valve may be operated

4 Classification
4.1 Classes of control
EN 13611:2019, 4.1 is not applicable.
4.2 Groups of control
Shall be according to EN 136
...

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