Safety and control devices for gas burners and gas burning appliances - Automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa

This European Standard specifies the safety, design, construction and performance requirements and testing for automatic shut-off
valves with or without modulating control functions (hereafter referred to as ‘valves’) for burners and appliances burning one or more
gaseous fuels according to EN 437:2003+A1:2009.
This European Standard is applicable to valves with declared maximum inlet pressures of more than 500 kPa (5 bar) and up to and including 6 300 kPa (63 bar).
This European Standard is applicable to
— electrically operated valves and to valves actuated by fluids including the pilot valves for these fluids if actuated electrically and
including release valves, but not to any external electrical devices for switching the actuating energy;
— automatic shut-off valves where the flow rate is controlled by external electrical signals proportional to the applied signal.
This European Standard is not applicable to valves specifically designed for use in transmission and distribution networks.
NOTE Provisions for final product inspection and testing by the manufacturer are not specified.

Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasbrennstoffgeräte - Automatische Absperrventile für einen Betriebsdruck über 500 kPa bis einschließlich 6 300 kPa

Dieses Dokument legt die Sicherheits , Entwurfs , Konstruktions- und Leistungsanforderungen und Prüfun-gen für automatische Absperrventile mit oder ohne regulierende Steuerfunktionen (im Folgenden als „Ventile“ bezeichnet) für die Verwendung mit Gasbrennern und Gasgeräten zur Verbrennung von einem oder mehreren gasförmigen Brennstoffen nach EN 437:2003+A1:2009 fest.
Dieses Dokument gilt für Ventile mit angegebenen maximalen Eingangsdrücken von über 500 kPa (5 bar) bis einschließlich 6 300 kPa (63 bar).
Dieses Dokument gilt für:
-   elektrisch betriebene Ventile und für Ventile, die durch Steuermedien angesteuert werden, einschließ-lich der Steuerventile für diese Steuermedien, wenn sie elektrisch betrieben sind und Auslassventile enthalten, nicht jedoch für externe elektrische Schaltgeräte für die Stellantriebsenergie;
-   automatische Absperrventile mit Durchflussregelung durch externe elektrische Signale proportional zum angewendeten Signal.
Dieses Dokument gilt nicht für Ventile, die speziell für die Verwendung in Transport- und Verteilungsnetzen ausgelegt sind.
ANMERKUNG   Vorschriften für die Inspektion und Prüfung des Endprodukts durch den Hersteller sind nicht fest-gelegt.

Équipements auxiliaires pour brûleurs à gaz et appareils à gaz - Robinets automatiques de sectionnement pour pression de service supérieure à 500 kPa et inférieure ou égale à 6300 kPa

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 conception, de construction et de fonctionnement ainsi que les essais applicables aux robinets automatiques de sectionnement pour brûleurs et appareils utilisant un ou plusieurs combustibles gazeux, dénommés ci-après « robinets ».
Le présent document est applicable aux robinets dont la pression amont maximale déclarée est supérieure à 500 kPa et inférieure ou égale à 6 300 kPa, de diamètres nominaux de raccordement inférieurs ou égaux à DN 250.
Addition :
Le présent document est applicable :
-   aux robinets commandés électriquement ;
-   aux robinets actionnés par des fluides, y compris aux robinets pilotes de ces fluides s’ils sont commandés électriquement et aux robinets de décharge, mais en aucun cas aux dispositifs électriques externes commutant l’énergie motrice de commande ;
-   aux robinets automatiques de sectionnement dans lesquels le débit est commandé par des signaux électriques externes, proportionnellement au signal reçu ;
-   aux robinets équipés de contacts indicateurs de position fermée.
Le présent document n’est pas applicable aux robinets spécifiquement conçus pour une utilisation dans les réseaux de transport et de distribution.
Le 4ième paragraphe de l’article 1 de la EN 13611 :2019 est supprimé.

Varnostne in nadzorne naprave za plinske gorilnike in plinske aparate - Samodejni zaporni ventili za delovni tlak nad 500 kPa do vključno 6300 kPa

General Information

Status
Published
Public Enquiry End Date
02-Jun-2020
Publication Date
14-Nov-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Oct-2022
Due Date
31-Dec-2022
Completion Date
15-Nov-2022

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SLOVENSKI STANDARD
SIST EN 16678:2022
01-december-2022
Nadomešča:
SIST EN 16678:2016

Varnostne in nadzorne naprave za plinske gorilnike in plinske aparate - Samodejni

zaporni ventili za delovni tlak nad 500 kPa do vključno 6300 kPa

Safety and control devices for gas burners and gas burning appliances - Automatic shut-

off valves for operating pressure of above 500 kPa up to and including 6 300 kPa
Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasbrennstoffgeräte -

Automatische Absperrventile für einen Betriebsdruck über 500 kPa bis einschließlich 6

300 kPa

Équipements auxiliaires pour brûleurs à gaz et appareils à gaz - Robinets automatiques

de sectionnement pour pression de service supérieure à 500 kPa et inférieure ou égale à

6300 kPa
Ta slovenski standard je istoveten z: EN 16678:2022
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 16678:2022 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 16678:2022
---------------------- Page: 2 ----------------------
SIST EN 16678:2022
EN 16678
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 23.060.40 Supersedes EN 16678:2015
English Version
Safety and control devices for gas burners and gas burning
appliances - Automatic shut-off valves for operating
pressure of above 500 kPa up to and including 6 300 kPa

Équipements auxiliaires pour brûleurs à gaz et Sicherheits- und Regeleinrichtungen für Gasbrenner

appareils à gaz - Robinets automatiques de und Gasbrennstoffgeräte - Automatische

sectionnement pour pression de service supérieure à Absperrventile für einen Betriebsdruck über 500 kPa

500 kPa et inférieure ou égale à 6300 kPa bis einschließlich 6 300 kPa
This European Standard was approved by CEN on 8 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 16678:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope ................................................................................................................................................................. 7

2 Normative references ................................................................................................................................. 7

3 Terms and definitions ................................................................................................................................. 9

4 Classification ............................................................................................................................................... 10

4.1 Classes of control ....................................................................................................................................... 10

4.2 Groups of control ....................................................................................................................................... 10

4.3 Classes of control functions ................................................................................................................... 10

4.4 Types of DC supplied controls ............................................................................................................... 10

5 Units of measurement and test conditions ...................................................................................... 10

6 Construction requirements ................................................................................................................... 10

6.1 General .......................................................................................................................................................... 10

6.2 Mechanical parts of the control ............................................................................................................ 10

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

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

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

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

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

7 Performance ................................................................................................................................................ 15

7.1 General .......................................................................................................................................................... 15

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

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

7.4 Rated flow rate ........................................................................................................................................... 16

7.5 Durability ..................................................................................................................................................... 16

7.6 Performance tests for electronic controls ........................................................................................ 17

7.7 Long-term performance for electronic controls ............................................................................ 17

7.8 Data Exchange ............................................................................................................................................. 17

7.101 Closing function .......................................................................................................................................... 17

7.102 Closing force ................................................................................................................................................ 18

7.103 Delay time and opening time................................................................................................................. 18

7.104 Closing time ................................................................................................................................................. 18

7.105 Sealing force ................................................................................................................................................ 19

7.106 Closed position indicator switch .......................................................................................................... 19

7.107 Endurance .................................................................................................................................................... 20

8 Electrical requirements .......................................................................................................................... 21

8.1 General .......................................................................................................................................................... 21

8.2 Protection by enclosure .......................................................................................................................... 21

8.101 Switches ........................................................................................................................................................ 21

8.102 Plug connections ........................................................................................................................................ 22

8.103 Power saving circuits ............................................................................................................................... 22

9 Electromagnetic compatibility (EMC) ................................................................................................ 22

9.1 Protection against environmental influences ................................................................................. 22

9.2 Supply voltage variations below 85 % of rated voltage .............................................................. 23

---------------------- Page: 4 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)

9.3 Voltage dips and interruptions ............................................................................................................. 23

9.4 Supply frequency variations .................................................................................................................. 23

9.5 Surge immunity tests ................................................................................................................................ 23

9.6 Electrical fast transient/burst ............................................................................................................... 23

9.7 Immunity to conducted disturbances induced by radio frequency fields ............................. 23

9.8 Immunity to radiated disturbances induced by radio frequency fields ................................ 23

9.9 Electrostatic discharge tests .................................................................................................................. 23

9.10 Power frequency magnetic field immunity tests ............................................................................ 23

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

frequency immunity tests ....................................................................................................................... 23

10 Marking, instructions ............................................................................................................................... 23

10.1 Marking .......................................................................................................................................................... 23

10.2 Instructions .................................................................................................................................................. 24

10.3 Warning notice ............................................................................................................................................ 25

Annex A (informative) Abbreviations and Symbols ...................................................................................... 26

Annex B (informative) Leak-tightness test for gas controls – volumetric method ............................ 27

Annex C (informative) Leak-tightness test for gas controls – pressure loss method ........................ 28

Annex D (normative) Calculation of pressure loss into leakage rate ..................................................... 29

Annex E (normative) Electrical/electronic component fault modes ...................................................... 30

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

accessories as defined in EU Directive 2014/68/EU ..................................................................... 31

Annex G (normative) Materials for pressurized parts ................................................................................. 32

Annex H (normative) Additional materials for pressurized parts .......................................................... 33

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

appliances burning gaseous or liquid fuels ...................................................................................... 34

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ....................... 35

Annex K (normative) Method for the determination of a Performance Level (PL) ........................... 36

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

Level (PL) ...................................................................................................................................................... 39

Annex M (normative) Reset functions ................................................................................................................ 40

Annex N (informative) Guidance document on Environmental Aspects ............................................... 41

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ...................................... 42

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

requirements of Regulation (EU) 2016/426 aimed to be covered .......................................... 43

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SIST EN 16678:2022
EN 16678:2022 (E)
European foreword

This document (EN 16678:2022) 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 16678:2015.

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

document:
a) alignment with EN 13611:2019;
b) terms and definitions are aligned with EN 13611:2019;
c) requirements from EU Directive 2014/68/EU were not adopted;
d) reference to EN 437 removed;
e) valves fitted with closed position indicator switches added to the scope;
f) Clause “Other controls assembled” to a valve removed;
g) Clause “Resistance to pressure” / safety factor removed;
h) Clause “Electronic component – sensing element” is not applicable;

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

j) 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: 6 ----------------------
SIST EN 16678:2022
EN 16678:2022 (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 determine Safety Integrity

Levels or Performance Levels when the system is being assessed in its entirety.

CEN/TC 58 standards for safety relevant controls do go beyond this approach, because for a certain life

time for which the product is specified, designed and tested a dangerous failure is not allowed at all.

Failure modes are described and assessed in greater detail.
Under preparation. Stage at the time of publication: FprEN 1854:2022.
---------------------- Page: 7 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)

Measures to prevent from dangerous situations are defined. Field experience over many decades is

reflected in the CEN/TC 58 standards. Requirements of EN 13611:2019 can be considered as proven in

practice.

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 subclauses to the structure of EN 13611:2019 which are particular to this

document. Subclauses which are additional to those in EN 13611:2019 are numbered starting from 101.

Additional Annexes are designated as Annex AA, Annex BB, Annex CC, etc. It should be noted that these

clauses, subclauses and Annexes are not indicated as an addition.

If by reference to EN 13611:2019 the term “control” is given, this term should be read as “valve”.

This document establishes methodologies for the determination of a Performance Level (PL) in

accordance with EN 13611:2019, Annexes K and L.

EN 16678 compliance for valves cannot be claimed based upon Performance Level (PL) classification

according to EN ISO 13849-1:2015 or Safety Integrity Level (SIL) classification according to

EN 61508-1:2010.

Valves with PL or SIL classification do not automatically meet the requirements of this document.

Performance Level (PL) classification according to EN ISO 13849-1:2015 or Safety Integrity Level (SIL)

classification according to EN 61508-1:2010 cannot be claimed based upon compliance with this

standard only.
---------------------- Page: 8 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)
1 Scope
EN 13611:2019, Clause 1 applies with the following modification and addition:
Modification:
The 1 paragraph of EN 13611:2019, Clause 1 is replaced by:

This document specifies the safety, design, construction, and performance requirements and testing for

automatic shut-off 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 of more than 500 kPa and

up to and including 6 300 kPa and of nominal connection sizes up to and including DN 250.

Addition:
This document is applicable to:
— electrically actuated valves;

— valves actuated by fluids including the pilot valves for these fluids if actuated electrically and

including release valves, but not to any external electrical devices for switching the actuating energy;

— valves where the flow rate is controlled by external electrical signals proportional to the applied

signal;
— valves fitted with closed position indicator switches.

This document is not applicable to valves specifically designed for use in transmission and distribution

networks.
The 4 paragraph of EN 13611:2019, Clause 1 is removed.
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 161:2022, Automatic shut-off valves for gas burners and gas appliances

EN 549:2019, Rubber materials for seals and diaphragms for gas appliances and gas equipment

EN 1092-1:2018, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN

designated — Part 1: Steel flanges

EN 1092-2:1997, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN

designated — Part 2: Cast iron flanges

EN 1092-3:2003 , Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN

designated — Part 3: Copper alloy flanges
As impacted by EN 1092-3:2003/AC:2007.
---------------------- Page: 9 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)

EN 1092-4:2002, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN

designated — Part 4: Aluminium alloy flanges

EN 1759-1:2004, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, Class

designated — Part 1: Steel flanges, NPS 1/2 to 24

EN 1759-3:2003 , Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories,

Class designated — Part 3: Copper alloy flanges

EN 1759-4:2003, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, class

designated — Part 4: Aluminium alloy flanges

EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads — Part 1: Taper

external threads and parallel internal threads — Dimensions, tolerances and designation

EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads — Part 2: Taper

external threads and taper internal threads — Dimensions, tolerances and designation

EN 12266-1:2012, Industrial valves — Testing of metallic valves — Part 1: Pressure tests, test procedures

and acceptance criteria — Mandatory requirements

EN 12516-1:2014+A1:2018, Industrial valves — Shell design strength — Part 1: Tabulation method for

steel valve shells

EN 12516-2:2014+A1:2021, Industrial valves — Shell design strength — Part 2: Calculation method for

steel valve shells
EN 12516-3:2002 , Valves — Shell design strength — Part 3: Experimental method

EN 12516-4:2014+A1:2018, Industrial valves — Shell design strength — Part 4: Calculation method for

valve shells manufactured in metallic materials other than steel
EN 12627:2017, Industrial valves — Butt welding ends for steel valves
EN 12760:2016, Industrial valves — Socket welding ends for steel valves

EN 13611:2019 , Safety and control devices for burners and appliances burning gaseous and/or liquid fuels

— General requirements

EN 60730-1:2016 , Automatic electrical controls — Part 1: General requirements (IEC 60730-1:2013,

modified)

EN IEC 61058-1:2018, Switches for appliances — Part 1: General requirements (IEC 61058-1:2016)

As impacted by EN 1759-3:2003/AC:2004.
As impacted by EN 12516-3:2002/AC:2003.
As impacted by EN 13611:2019/AC:2021.
As impacted by EN 60730-1:2016/A1:2019 and EN 60730-1:2016/A2:2022.
---------------------- Page: 10 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)

EN 175301-803:2006, Detail Specification: Rectangular connectors — Flat contacts, 0,8 mm thickness,

locking screw not detachable

ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests

ISO 1431-1:2022, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and

dynamic strain testing

ISO 1817:2022, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids

ISO 8573-1:2010, Compressed air — Part 1: Contaminants and purity classes
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 13611:2019, EN 161:2021 and

the following apply.

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

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.101
pilot valve

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

Note 1 to entry: A typical pilot and release valve application is shown in Figure 2.

3.102
release valve

valve in the line from the pilot valve to the actuating mechanism which closes the vent automatically

when the actuating fluid is released by the pilot valve and opens it automatically when the pilot valve is

closed

Note 1 to entry: A typical pilot and release valve application is shown in Figure 2.

Key
1 control under test
2 pilot valve (normally closed)
3 release valve, normally open
Figure 2 — Typical pilot and release valve application
---------------------- Page: 11 ----------------------
SIST EN 16678:2022
EN 16678:2022 (E)
4 Classification
4.1 Classes of control
EN 13611:2019, 4.1 is replaced by the following:
— Class A valves:

Valves where the sealing force is not decreased by the gas inlet pressure. They are classified A

according to the sealing force requirements of 7.105. Balanced valves according to this document are

also classified as Class A valves.
— Class D valves:

Valves which are not subject to the requirements for the sealing force and fixed closing time.

4.2 Groups of control
Shall be according to EN 13611:2019, 4.2.
4.3 Classes of control functions
EN 13611:2019, 4.3 is not applicable.
4.4 Types of DC supplied controls
Shall be according to EN 13611:2019, 4.4.
5 Units of measurement and test conditions
Shall be according to EN 13611:2019, Clause 5.
6 Construction requirements
6.1 General
Shall be according to EN 13611:2019, 6.1 with the following addition:

If an automatic shut-off valve requires a release and/or a pilot valve to fulfil the requirements of this

document, these are considered to be part of the automatic shut-off valve and shall be specified in the

instructions. The combination of automatic shut-off valve and release and/or pilot valve shall conform to

all requirements of this document.

The interaction of all valves participating in the closing mechanism shall be evaluated. An appropriate

risk assessment shall be carried out.

For each pressurized compartment the local maximum pressure shall be considered for the strength

design and for the selection of the material. It shall be ensured by mechanical means that parts for

different pressures are separated. A diaphragm shall not be used for this purpose.

6.2 Mechanical parts of the control
6.2.1 Appearance
Shall be according to EN 13611:2019, 6.2.1.
---------------------- Page: 12
...

SLOVENSKI STANDARD
oSIST prEN 16678:2020
01-maj-2020

Varnostne in nadzorne naprave za plinske gorilnike in plinske aparate - Samodejni

zaporni ventili za delovni tlak nad 500 kPa do vključno 6300 kPa

Safety and control devices for gas burners and gas burning appliances - Automatic shut-

off valves for operating pressure of above 500 kPa up to and including 6 300 kPa
Sicherheits- und Regeleinrichtungen für Gasbrenner und Gasbrennstoffgeräte -

Automatische Absperrventile für einen Betriebsdruck über 500 kPa bis einschließlich 6

300 kPa

Équipements auxiliaires pour brûleurs à gaz et appareils à gaz - Robinets automatiques

de sectionnement pour pression de service supérieure à 500 kPa et inférieure ou égale à

6300 kPa
Ta slovenski standard je istoveten z: prEN 16678
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 16678:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN 16678:2020
---------------------- Page: 2 ----------------------
oSIST prEN 16678:2020
DRAFT
EUROPEAN STANDARD
prEN 16678
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 23.060.40 Will supersede EN 16678:2015
English Version
Safety and control devices for gas burners and gas burning
appliances - Automatic shut-off valves for operating
pressure of above 500 kPa up to and including 6 300 kPa

Équipements auxiliaires pour brûleurs à gaz et Sicherheits- und Regeleinrichtungen für Gasbrenner

appareils à gaz - Robinets automatiques de und Gasbrennstoffgeräte - Automatische

sectionnement pour pression de service supérieure à Absperrventile für einen Betriebsdruck über 500 kPa

500 kPa et inférieure ou égale à 6300 kPa bis einschließlich 6 300 kPa

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 16678:2020 E

worldwide for CEN national Members.
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Contents Page

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

1 Scope ................................................................................................................................................................. 7

2 Normative references ................................................................................................................................. 8

3 Terms and definitions ................................................................................................................................. 9

4 Classification ............................................................................................................................................... 10

4.1 Classes of control ....................................................................................................................................... 10

4.2 Groups of control ....................................................................................................................................... 10

4.3 Classes of control functions ................................................................................................................... 10

5 Units of measurement and test conditions ...................................................................................... 10

6 Construction requirements ................................................................................................................... 10

6.1 General .......................................................................................................................................................... 10

6.2 Mechanical parts of the control ............................................................................................................ 10

6.2.1 Appearance .................................................................................................................................................. 10

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

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

6.2.4 Screwed fastenings ................................................................................................................................... 11

6.2.5 Jointing .......................................................................................................................................................... 11

6.2.6 Moving parts ................................................................................................................................................ 11

6.2.7 Sealing caps.................................................................................................................................................. 11

6.2.8 Dismantling and reassembly ................................................................................................................. 11

6.2.9 Auxilliary canals and orifices ................................................................................................................ 11

6.2.10 Presetting devices ..................................................................................................................................... 11

6.2.101 Closed position indicator switch .......................................................................................................... 11

6.2.102 Valve with modulating control ............................................................................................................. 11

6.2.103 Other controls assembled to a valve ................................................................................................... 12

6.2.104 Balanced valves .......................................................................................................................................... 12

6.2.105 Additional requirements for shut-off function ............................................................................... 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 providing closing and/or sealing force ............................................................................. 12

6.3.5 Resistance to corrosion and surface protection ............................................................................. 12

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

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

6.3.101 Closure members ....................................................................................................................................... 13

6.3.102 Parts transmitting the closing force ................................................................................................... 13

6.3.103 Balanced valves .......................................................................................................................................... 13

6.3.104 Bellows .......................................................................................................................................................... 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 ................................................................................................................................ 14

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6.4.7 Nipples for pressure test ......................................................................................................................... 14

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

6.4.101 Welded connections .................................................................................................................................. 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

6.6.1 Design and construction requirements ............................................................................................. 14

6.6.2 Class A............................................................................................................................................................. 14

6.6.3 Class B............................................................................................................................................................. 14

6.6.4 Class C ............................................................................................................................................................. 14

6.6.5 Circuit and construction evaluation .................................................................................................... 15

6.101 Pneumatic and hydraulic actuating mechanisms .......................................................................... 15

7 Performance ................................................................................................................................................ 15

7.1 General ........................................................................................................................................................... 15

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

7.2.1 Requirements .............................................................................................................................................. 15

7.2.2 Tests ................................................................................................................................................................ 15

7.3 Torsion and bending ................................................................................................................................. 16

7.3.1 General ........................................................................................................................................................... 16

7.3.2 Torsion and bending moments ............................................................................................................. 16

7.4 Rated flow rate ............................................................................................................................................ 16

7.5 Durability ...................................................................................................................................................... 16

7.5.1 Elastomers in contact with gas .............................................................................................................. 16

7.5.2 Durability of Marking ............................................................................................................................... 17

7.5.3 Resistance to scratching .......................................................................................................................... 17

7.5.4 Resistance to humidity ............................................................................................................................. 17

7.5.5 Lubricants in contact with gas ............................................................................................................... 17

7.6 Performance test for electronic controls .......................................................................................... 17

7.7 Long-term performance for electronic controls ............................................................................. 17

7.8 Data Exchange ............................................................................................................................................. 18

7.101 Closing function concerning remanence ........................................................................................... 18

7.101.1 Requirement ................................................................................................................................................ 18

7.101.2 Test of closing function ............................................................................................................................ 18

7.102 Closing force ................................................................................................................................................. 18

7.102.1 Requirement ................................................................................................................................................ 18

7.102.2 Test of closing force ................................................................................................................................... 18

7.103 Delay time and opening time ................................................................................................................. 19

7.103.1 Requirement ................................................................................................................................................ 19

7.103.2 Test of delay time and opening time ................................................................................................... 19

7.104 Closing time .................................................................................................................................................. 19

7.104.1 Requirement ................................................................................................................................................ 19

7.104.2 Test of closing time .................................................................................................................................... 19

7.105 Sealing force ................................................................................................................................................. 19

7.105.1 Requirement ................................................................................................................................................ 19

7.105.2 Test of sealing force .................................................................................................................................. 20

7.106 Closed position indicator switch .......................................................................................................... 20

7.106.1 Requirement ................................................................................................................................................ 20

7.106.2 Test of closed position indicator switch ............................................................................................ 20

7.107 Endurance ..................................................................................................................................................... 20

7.107.1 Requirement ................................................................................................................................................ 20

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7.107.2 Endurance test ............................................................................................................................................ 20

8 EMC/Electrical requirements................................................................................................................ 21

8.1 General .......................................................................................................................................................... 21

8.2 Protection by enclosure .......................................................................................................................... 21

8.101 Electrical equipment ................................................................................................................................ 22

8.101.1 Switches ........................................................................................................................................................ 22

8.101.2 Plug connections ........................................................................................................................................ 22

8.101.3 Power saving circuits ............................................................................................................................... 22

9 Electromagnetic compatibility (EMC) ................................................................................................ 22

9.1 Protection against environmental influences ................................................................................. 22

9.2 Supply voltage variations below 85 % of rated voltage .............................................................. 22

9.3 Voltage dips and interruptions ............................................................................................................. 23

9.4 Supply frequency variations .................................................................................................................. 23

9.5 Surge immunity tests ............................................................................................................................... 23

9.6 Electrical fast transient/burst .............................................................................................................. 23

9.7 Immunity to conducted disturbances induced by radio frequency fields ............................ 23

9.8 Immunity to radiated disturbances induced by radio frequency fields ................................ 23

9.9 Electrostatic discharge tests .................................................................................................................. 23

9.10 Power frequency magnetic field immunity tests ........................................................................... 23

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

frequency immunity tests ....................................................................................................................... 23

10 Marking, instructions ............................................................................................................................... 23

10.1 Marking ......................................................................................................................................................... 23

10.2 Instructions ................................................................................................................................................. 24

10.3 Warning notice ........................................................................................................................................... 25

Annex A (informative) Abbreviations and Symbols ..................................................................................... 26

Annex B (informative) Leak-tightness test – volumetric method ............................................................ 27

Annex C (informative) Leak-tightness test – pressure loss method ....................................................... 28

Annex D (normative) Calculation of pressure loss into leakage rate ..................................................... 29

Annex E (normative) Electrical/electronic component fault modes ...................................................... 30

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

accessories as defined in EU Directive 2014/68/EU .................................................................... 31

Annex G (normative) Materials for pressurized parts ................................................................................. 32

Annex H (informative) Additional materials for pressurized parts ....................................................... 33

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

burning appliances ................................................................................................................................... 34

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ...................... 35

Annex K (normative) Method for the determination of a Performance Level (PL)........................... 36

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

Level (PL) ...................................................................................................................................................... 37

Annex M (informative) Reset functions ............................................................................................................ 38

Annex N (informative) Guidance document on environmental aspects ............................................... 39

Annex O (informative) Seals of elastomer, cork and synthetic fibre mixtures ................................... 40

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

requirements of Regulation (EU) 2016/426 aimed to be covered .......................................... 41

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

requirements of Directive 2014/68/EU aimed to be covered ................................................... 46

Bibliography ................................................................................................................................................................. 50

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European foreword

This document (prEN 16678:2020) 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 16678:2015.

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 or ZB, which are an integral part of this

document.
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oSIST prEN 16678:2020
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Introduction

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 13611:2019 which are particular to

this document. It should be noted that these clauses and subclauses are not indicated as an addition.

Subclauses which are additional to those in EN 13611:2019 are numbered starting from 101. Additional

Annexes are designated as Annex AA, BB, CC, etc.
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oSIST prEN 16678:2020
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1 Scope

This document specifies the safety, design, construction and performance requirements and testing for

automatic shut-off valves with or without modulating control functions (hereafter referred to as

‘valves’) for burners and appliances burning one or more gaseous fuels according to

EN 437:2003+A1:2009.

This document is applicable to valves with declared maximum inlet pressures of more than 500 kPa

(5 bar) and up to and including 6 300 kPa (63 bar).
This document is applicable to

— electrically operated valves and to valves actuated by fluids including the pilot valves for these

fluids if actuated electrically and including release valves, but not to any external electrical devices

for switching the actuating energy;

— automatic shut-off valves where the flow rate is controlled by external electrical signals

proportional to the applied signal.

This document is not applicable to valves specifically designed for use in transmission and distribution

networks.

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 161:2011+A3:2013, Automatic shut-off valves for gas burners and gas appliances

EN 682:2002, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas

and hydrocarbon fluids

EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper

external threads and parallel internal threads - Dimensions, tolerances and designation

EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper

external threads and taper internal threads - Dimensions, tolerances and designation

EN 12516-1:2014, Industrial valves — Shell design st
...

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