Automatic shut-off valves for gas burners and gas appliances

This European Standard specifies the safety, construction and performance requirements for automatic shut-off valves for use with gas burners, gas appliances and similar use, hereafter referred to as ‘valves’.
This European Standard is 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 250 for use with one or more fuel gases in accordance with EN 437.
This European Standard is applicable to electrically operated valves and to valves actuated by fluids where the control valves for these fluids are actuated electrically, but not to any external electrical devices for switching the control signal or actuating energy.
An assessment method for valve designs is given by this European Standard.
This European Standard is also applicable to valves where the flow rate is controlled by external electrical signals, either in discrete steps or proportional to the applied signal.
This European Standard is also applicable to valves fitted with closed position indicator switches.
NOTE   Provisions for final product inspection and testing by the manufacturer are not specified.

Automatische Absperrventile für Gasbrenner und Gasgeräte

Dieses Dokument legt die Sicherheits-, Bau- und Funktionsanforderungen an automatische Absperrventile zur Verwendung mit Gasbrennern, Gasgeräten und ähnlichen Anwendungen, nachstehend Ventile genannt, fest.
Dieses Dokument gilt für Ventile mit angegebenen höchsten Eingangsdrücken bis einschließlich 500 kPa (5 bar) und Nennweiten bis einschließlich DN 250, die zur Verwendung mit einem oder mehreren Brenngasen nach EN 437 ausgelegt sind.
Dieses Dokument gilt für elektrisch betriebene Ventile und für 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.
Dieses Dokument gibt ein Bewertungsverfahren für die Auslegung und Konstruktion von Ventilen an.
Dieses Dokument gilt auch für Ventile, bei denen die Durchflussmenge durch externe elektrische Signale entweder in Stufen oder proportional zum angelegten Signal gesteuert wird.
Dieses Dokument gilt auch für Ventile mit Schaltern, die die geschlossene Stellung anzeigen.
ANMERKUNG Bestimmungen für die Prüfung von Endprodukten durch den Hersteller sind nicht festgelegt.
Dieses Dokument stellt Vorgehensweisen zur Bestimmung des Performance Levels (PL) in Übereinstimmung mit EN 13611:2019, Anhang K und Anhang L auf.

Robinets automatiques de sectionnement pour brûleurs à gaz et appareils à gaz

L’article 1 de la norme EN 13611:2019 s’applique avec la modification et l’addition suivantes :
Modification :
Le 1er paragraphe de l’article 1 de la norme EN 13611:2019 est remplacé par ce qui suit :
Le présent document spécifie les exigences de sécurité, de construction et de fonctionnement et les essais applicables aux robinets automatiques de sectionnement pour brûleurs à gaz, appareils à gaz et similaires, dénommés ci-après « robinets ».
Ce document s'applique 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 250.
Addition :
Le document est applicable aux :
-   robinets de sectionnement commandés électriquement ;
-   robinets de sectionnement actionnés par des fluides si les vannes de commande de ces fluides sont commandées électriquement, mais en aucun cas aux dispositifs électriques externes commutant le signal de commande ou libérant l'énergie motrice de commande ;
-   robinets dans lesquels le débit est commandé par des signaux électriques externes, soit par pas, soit proportionnellement au signal reçu ;
-   robinets équipés de contacts indicateurs de position de fermeture.
Une méthode d'évaluation de la conception des robinets est donnée par le présent document.
Le 4ième paragraphe de l’article 1 de la EN 13611 :2019 est supprimé.

Samodejni zaporni ventili za plinske gorilnike in plinske aparate

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 161:2022
01-december-2022
Nadomešča:
SIST EN 161:2011+A3:2013
Samodejni zaporni ventili za plinske gorilnike in plinske aparate
Automatic shut-off valves for gas burners and gas appliances
Automatische Absperrventile für Gasbrenner und Gasgeräte
Robinets automatiques de sectionnement pour brûleurs à gaz et appareils à gaz
Ta slovenski standard je istoveten z: EN 161:2022
ICS:
23.060.10 Zapirni ventili (kroglasti) Globe valves
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 161:2022 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 161:2022
---------------------- Page: 2 ----------------------
SIST EN 161:2022
EN 161
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 23.060.10 Supersedes EN 161:2011+A3:2013
English Version
Automatic shut-off valves for gas burners and gas
appliances

Robinets automatiques de sectionnement pour Automatische Absperrventile für Gasbrenner und

brûleurs à gaz et appareils à gaz Gasgeräte
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 161:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 161:2022
EN 161:2022 (E)
Contents Page

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

Introduction .................................................................................................................................................................... 6

1 Scope .............................................................................................................................................................. 8

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

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

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

6.3 Materials .................................................................................................................................................... 14

6.4 Gas connections ...................................................................................................................................... 15

6.5 Electrical parts of the control ............................................................................................................ 15

6.6 Protection against internal faults for the purpose of functional safety ............................. 16

6.101 Pneumatic and hydraulic actuating mechanisms ....................................................................... 16

7 Performance............................................................................................................................................. 16

7.1 General ....................................................................................................................................................... 16

7.2 Leak-tightness ......................................................................................................................................... 16

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

7.4 Rated flow rate ........................................................................................................................................ 17

7.5 Durability .................................................................................................................................................. 17

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 .............................................................................................................................................. 19

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

7.106 Closed position indicator switch ...................................................................................................... 21

7.107 Endurance ................................................................................................................................................. 21

8 Electrical requirements ....................................................................................................................... 23

8.1 General ....................................................................................................................................................... 23

8.2 Protection by enclosure ....................................................................................................................... 23

8.101 Switches ..................................................................................................................................................... 23

8.102 Plug connections ..................................................................................................................................... 23

8.103 Power saving circuits ............................................................................................................................ 24

9 Electromagnetic compatibility (EMC) ............................................................................................. 24

9.1 Protection against environmental influences ............................................................................. 24

9.2 Supply voltage variations below 85 % of rated voltage ........................................................... 24

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SIST EN 161:2022
EN 161:2022 (E)

9.3 Voltage dips and interruptions .......................................................................................................... 24

9.4 Supply frequency variations ............................................................................................................... 25

9.5 Surge immunity tests ............................................................................................................................. 25

9.6 Electrical fast transient/burst ........................................................................................................... 25

9.7 Immunity to conducted disturbances induced by radio frequency fields ......................... 25

9.8 Immunity to radiated disturbances induced by radio frequency fields ............................. 25

9.9 Electrostatic discharge tests ............................................................................................................... 25

9.10 Power frequency magnetic field immunity tests ........................................................................ 25

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

frequency immunity tests .................................................................................................................... 25

10 Marking, instructions ............................................................................................................................ 25

10.1 Marking ...................................................................................................................................................... 25

10.2 Instructions ............................................................................................................................................... 26

10.3 Warning notice ........................................................................................................................................ 27

Annex A (informative) Abbreviations and symbols ...................................................................................... 28

Annex B (informative) Leak-tightness test for gas controls – volumetric method ............................ 29

Annex C (informative) Leak-tightness test for gas controls – pressure loss method ........................ 30

Annex D (normative) Calculation of pressure loss into leakage rate ..................................................... 31

Annex E (normative) Electrical/electronic component fault modes ...................................................... 32

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

accessories as defined in EU Directive 2014/68/EU .................................................................. 33

Annex G (normative) Materials for pressurized parts ................................................................................. 34

Annex H (normative) Additional materials for pressurized parts .......................................................... 35

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

appliances burning gaseous or liquid fuels ................................................................................... 36

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ....................... 37

Annex K (normative) Method for the determination of a Performance Level (PL) ........................... 38

K.1 Scope ........................................................................................................................................................... 38

K.2 Normative references............................................................................................................................ 38

K.3 Terms and definitions ........................................................................................................................... 38

K.4 Performance ............................................................................................................................................. 38

K.5 Marking, instructions ............................................................................................................................ 40

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

Level (PL) ................................................................................................................................................... 41

Annex M (normative) Reset functions ................................................................................................................ 42

Annex N (informative) Guidance document on Environmental Aspects ............................................... 43

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ...................................... 44

Annex AA (informative) Model of a FMEA for valves .................................................................................... 45

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

requirements of Regulation (EU) 2016/426 aimed to be covered ....................................... 63

Bibliography ................................................................................................................................................................. 66

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SIST EN 161:2022
EN 161:2022 (E)
European foreword

This document (EN 161:2022) 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 161:2011+A3:2013.

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) different leak-tightness requirement for balanced valves;

f) EN 13611:2019, 6.5.2 switching elements and EN 13611:2019, 6.5.3.3 sensing elements are not

applicable any more;
g) general requirements of 7.1 moved to EN 13611:2019, 7.1;
h) pressure limit for nipples for pressure test removed;

i) requirements of 6.4.8 moved to EN 13611:2019, 6.4.8, except from Class J valves;

j) requirements of 6.6 protection against internal faults for the purpose of functional safety, 7.6

performance tests and 7.7 long-term performance of electronic parts are not applicable anymore;

k) requirements of 7.107.2, Table 2 test cycles, endurance test was adapted.

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.
---------------------- Page: 6 ----------------------
SIST EN 161:2022
EN 161:2022 (E)

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: 7 ----------------------
SIST EN 161:2022
EN 161:2022 (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: 8 ----------------------
SIST EN 161:2022
EN 161:2022 (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 161 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: 9 ----------------------
SIST EN 161:2022
EN 161:2022 (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 up to and including

500 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 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 where the flow rate is controlled by external electrical signals, either in discrete steps or

proportional to the applied signal;
— valves fitted with closed position indicator switches.
An assessment method for valve designs is given by this document.
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 30-1-4:2012, Domestic cooking appliances burning gas — Safety — Part 1-4: Appliances having one or

more burners with an automatic burner control system

EN 298:2022, Automatic gas burner control systems for gas burners and gas burning appliances with or

without fans

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

fuels — General requirements

EN 13906-1:2013, Cylindrical helical springs made from round wire and bar — Calculation and design —

Part 1: Compression springs

EN 13906-2:2013, Cylindrical helical springs made from round wire and bar — Calculation and design —

Part 2: Extension springs
As impacted by EN 13611:2019/AC:2021.
---------------------- Page: 10 ----------------------
SIST EN 161:2022
EN 161:2022 (E)

EN 60730-1:2016 , Automatic electrical controls for household and similar use — 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)

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

locking screw not detachable
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 https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.101
automatic shut-off valve
valve which opens when energized and closes automatically when de-energized
3.102
actuating mechanism
part of the valve which moves the closure member
3.103
valve with step control
valve which controls the flow rate in steps
3.104
valve with modulating control

valve which controls the flow rate continuously between two limits in response to external electrical

signals
3.105
closed position indicator switch

switch fitted to a valve which indicates when the closure member is in the closed position

3.106
actuating energy

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

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

transformed inside the valve.
3.107
opening force
force required to move the closure member to the open position
As impacted by EN 60730-1:2016/A1:2019 and EN 60730-1:2016/A2:2022.
---------------------- Page: 11 ----------------------
SIST EN 161:2022
EN 161:2022 (E)
3.108
closing force

force available to close the valve, independent of any force provided by fuel gas pressure

3.109
sealing force

force acting on the valve seat when the closure member is in the closed position, independent of any force

provided by fuel gas pressure
3.110
frictional force

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

to the closed position with the closure spring removed, independent of any force provided by fuel gas

pressure
3.111
actuating pressure
hydraulic or pneumatic pressure supplied to the actuating mechanism of the valve
3.112
opening time

time interval between energizing the valve and the attainment of the maximum or other defined flow rate

3.113
closing time

time interval between de-energizing the valve and the closure member attaining the closed position

3.114
delay time
time interval between energizing the valve and the start of flow
3.115
control valve

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

3.116
balanced valve

valve with a balanced closure member where the inlet pressure acts on the closure member in the

opening and closing direction
Note 1 to entry: The closure member can close more than one opening.
3.117
power saving circuit
circuit, which reduces the power consumption of the valve during the open phase
---------------------- Page: 12 ----------------------
SIST EN 161:2022
EN 161:2022 (E)
4 Classification
4.1 Classes of control
EN 13611:2019 is replaced by the following:
— Class A, B and C valves

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

according to the sealing force requirements of 7.105.1. Balanced valves according to this standard

are class A valves.
— Class D valves

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

Class D valves are intended to be used for control functions only.
— Class J valves

Disc-on-seat valves where the sealing force is not decreased by the gas inlet pressure and which meet

the requirements of 7.105.1.
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 Test conditions and uncertainty of measurements
Shall be according to EN 13611:2019, Clause 5.
6 Design and construction
6.1 General
Shall be according to EN 13611:2019, 6.1.
6.2 Mechanical parts of the control
6.2.1 Appearance
Shall be according to EN 13611:2019, 6.2.1.
6.2.2 Holes
Shall be according to EN 13611:2019, 6.2.2.
6.2.3 Breather holes
Shall be according to EN 13611:2019, 6.2.3.
---------------------- Page: 13 ----------------------
SIST EN 161:2022
EN 161:2022 (E)
6.2.4 Screwed fastenings
Shall be according to EN 13611:2019, 6.2.4.
6.2.5 Jointing
Shall be according to EN 13611:2019, 6.2.5.
6.2.6 Moving parts
Shall be according to EN 13611:2019, 6.2.6.
6.2.7 Sealing caps
Shall be according to EN 13611:2019, 6.2.7.
6.2.8 Dismantling and reassembly
Shall be according to EN 13611:2019, 6.2.8.
6.2.9 Auxiliary canals and orifices
Shall be according to EN 13611:2019, 6.2.9.
6.2.10 Presetting device
Shall be according to EN 13611:2019, 6.2.10.
6.2.101 Design

There shall be no exposed shafts or operating levers which could adversely affect the ability of valves to

close.
6.2.102 Closed position indicator switch

Closed position indicator switches, where fitted, shall not impair the correct operation of valves.

Adjusters shall be sealed to indicate inte
...

SLOVENSKI STANDARD
oSIST prEN 161:2020
01-maj-2020
Samodejni zaporni ventili za plinske gorilnike in plinske aparate
Automatic shut-off valves for gas burners and gas appliances
Automatische Absperrventile für Gasbrenner und Gasgeräte
Robinets automatiques de sectionnement pour brûleurs à gaz et appareils à gaz
Ta slovenski standard je istoveten z: prEN 161
ICS:
23.060.10 Zapirni ventili (kroglasti) Globe valves
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 161:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN 161:2020
---------------------- Page: 2 ----------------------
oSIST prEN 161:2020
DRAFT
EUROPEAN STANDARD
prEN 161
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 23.060.10 Will supersede EN 161:2011+A3:2013
English Version
Automatic shut-off valves for gas burners and gas
appliances

Robinets automatiques de sectionnement pour Automatische Absperrventile für Gasbrenner und

brûleurs à gaz et appareils à gaz Gasgeräte

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 161:2020 E

worldwide for CEN national Members.
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oSIST prEN 161:2020
prEN 161:2020 (E)
Contents Page

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

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

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

3 Terms and definitions ............................................................................................................................. 8

4 Classification ............................................................................................................................................... 9

4.1 Classes of control ....................................................................................................................................... 9

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

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

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

5 Test conditions and uncertainty of measurements ................................................................... 10

6 Design and construction ...................................................................................................................... 10

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

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

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

6.2.2 Holes ........................................................................................................................................................... 10

6.2.3 Breather holes ......................................................................................................................................... 10

6.2.4 Screwed fastenings ................................................................................................................................ 10

6.2.5 Jointing ....................................................................................................................................................... 10

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

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

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

6.2.9 Auxiliary channels and orifices ......................................................................................................... 11

6.2.10 Presetting device .................................................................................................................................... 11

6.2.101 Design ......................................................................................................................................................... 11

6.2.102 Closed position indicator switch ...................................................................................................... 11

6.2.103 Valve with modulating control .......................................................................................................... 11

6.2.104 Controls assembled to a valve ........................................................................................................... 11

6.2.105 Balanced valves ....................................................................................................................................... 11

6.2.106 Closing and sealing ................................................................................................................................ 12

6.2.107 Additional requirements for shut-off function ............................................................................ 13

6.3 Materials .................................................................................................................................................... 13

6.3.1 General material requirements ........................................................................................................ 13

6.3.2 Housing ...................................................................................................................................................... 13

6.3.3 Zinc alloys ................................................................................................................................................. 13

6.3.4 Springs........................................................................................................................................................ 13

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

6.3.6 Impregnation ........................................................................................................................................... 14

6.3.7 Seals for glands for moving parts ..................................................................................................... 14

6.3.101 Closure members ................................................................................................................................... 14

6.4 Gas connections ...................................................................................................................................... 14

6.4.1 Making connections ............................................................................................................................... 14

6.4.2 Connection sizes ..................................................................................................................................... 14

6.4.3 Threads ...................................................................................................................................................... 14

6.4.4 Union joints .............................................................................................................................................. 14

6.4.5 Flanges ....................................................................................................................................................... 14

6.4.6 Compression fittings ............................................................................................................................. 14

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

6.4.8 Shall be according to EN 13611:2019, 6.4.7 Strainers............................................................... 14

6.5 Text is already in EN 13611. Electronic parts of the control................................................... 15

6.5.1 General ....................................................................................................................................................... 15

6.5.2 Switching elements ................................................................................................................................ 15

6.5.3 Electrical components ........................................................................................................................... 15

6.6 Protection against internal faults for the purpose of functional safety .............................. 15

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

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

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

7.2 Leak-tightness .......................................................................................................................................... 16

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

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

7.4.1 Requirement ............................................................................................................................................. 16

7.4.2 Test .............................................................................................................................................................. 16

7.4.3 Conversion of air flow rate .................................................................................................................. 16

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

7.6 Performance tests for electronic controls ..................................................................................... 16

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

7.8 Data exchange .......................................................................................................................................... 17

7.101 Closing function concerning remanence ........................................................................................ 17

7.101.1 Requirement ............................................................................................................................................. 17

7.101.2 Test of closing function ......................................................................................................................... 17

7.102 Closing force ............................................................................................................................................. 17

7.102.1 Requirement ............................................................................................................................................. 17

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

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

7.103.1 Requirement ............................................................................................................................................. 18

7.103.2 Test of delay time and opening time ................................................................................................ 18

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

7.104.1 Requirement ............................................................................................................................................. 18

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

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

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

7.105.2 Test .............................................................................................................................................................. 20

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

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

7.106.2 Test .............................................................................................................................................................. 20

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

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

7.107.2 Endurance test ......................................................................................................................................... 21

7.107.3 Endurance test for closed position indicator switch ................................................................. 22

7.107.4 Flow characteristics ............................................................................................................................... 22

8 Electrical requirements ........................................................................................................................ 23

8.1 General ....................................................................................................................................................... 23

8.2 Protection by enclosure ....................................................................................................................... 23

8.101 Switches...................................................................................................................................................... 23

8.102 Plug connections ..................................................................................................................................... 23

8.103 Power saving circuits ............................................................................................................................ 24

8.103.1 Closing of the valve ................................................................................................................................. 24

8.103.2 Overheating .............................................................................................................................................. 24

8.103.3 Test of power-saving circuits ............................................................................................................. 24

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9 Electromagnetic compatibility (EMC) ............................................................................................. 24

9.1 Protection against environmental influences ............................................................................. 24

9.2 Supply voltage variations below 85 % of rated voltage ........................................................... 24

9.3 Voltage dips and interruptions ......................................................................................................... 24

9.4 Supply frequency variations .............................................................................................................. 24

9.5 Surge immunity tests ............................................................................................................................ 24

9.6 Electrical fast transient/burst ........................................................................................................... 24

9.7 Immunity to conducted disturbances induced by radio frequency fields ......................... 25

9.8 Immunity to radiated disturbances induced by radio frequency fields............................. 25

9.9 Electrostatic discharge tests .............................................................................................................. 25

9.10 Power frequency magnetic field immunity tests ........................................................................ 25

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

frequency immunity tests ................................................................................................................... 25

10 Marking, installation and operating instructions ...................................................................... 25

10.1 Marking ...................................................................................................................................................... 25

10.2 Installation and operating instructions ......................................................................................... 26

10.3 Warning notice ........................................................................................................................................ 26

Annex A (informative) Abbreviations and Symbols ..................................................................................... 27

Annex B (informative) Leak-tightness test for gas controls – volumetric method ............................ 28

Annex C (informative) Leak-tightness test for gas controls – pressure loss method ....................... 29

Annex D (normative) Calculation of pressure loss into leakage rate ..................................................... 30

Annex E (normative) Electrical/electronic component fault modes ...................................................... 31

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

accessories as defined in EU Directive 2014/68/EU ................................................................. 32

Annex G (normative) Materials for pressurized parts ................................................................................. 33

Annex H (informative) Additional materials for pressurized parts ....................................................... 34

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

appliances burning gaseous or liquid fuels .................................................................................. 35

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ...................... 36

Annex K (normative) Method for the determination of a Performance Level (PL)........................... 37

K.1 Scope ........................................................................................................................................................... 37

K.2 Normative references ........................................................................................................................... 37

K.3 Terms and definitions .......................................................................................................................... 37

K.4 Performance............................................................................................................................................. 37

K.4.1 Operation mode ...................................................................................................................................... 37

K.4.2 PL and field data evaluation ............................................................................................................... 37

K.4.3 Hardware failure tolerance (HFT) ................................................................................................... 37

K.4.4 Common cause failure (CCF) .............................................................................................................. 37

K.4.5 Safe failure fraction (SFF) .................................................................................................................... 38

K.4.6 Determination of the B value ..................................................................................................... 38

10d

K.4.7 Determination of Performance Level (PL) .................................................................................... 39

K.4.8 PFHD values for structures consisting of two controls ............................................................ 39

K.5 Marking, installation and operating instructions ...................................................................... 39

K.5.1 Marking ...................................................................................................................................................... 39

K.5.2 Installation and operating instructions ......................................................................................... 39

K.5.3 Warning notice ........................................................................................................................................ 39

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

Level (PL) ................................................................................................................................................... 40

Annex M (normative) Reset functions ................................................................................................................ 41

Annex N (informative) Guidance document on environmental aspects ................................................ 42

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ...................................... 43

Annex AA (informative) Model of a FMEA for valves .................................................................................... 44

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

requirements of Regulation (EU) 2016/426 aimed to be covered ....................................... 62

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

requirements of Directive 2014/68/EU aimed to be covered ............................................... 66

Bibliography ................................................................................................................................................................. 69

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oSIST prEN 161:2020
prEN 161:2020 (E)
European foreword

This document (prEN 161:2020) 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 161+A3:2011:2013.

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 B, which is an integral part of this

document.

This document is intended to be used in conjunction with EN 13611:2007+A2:2011. This document

refers to clauses of EN 13611:2007+A2:2011 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 European Standard adds clauses or sub-clauses to the structure of

EN 13611:2007+A2:2011 which are particular to this European Standard. Subclauses which are

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

designed as Annex AA, BB, CC, etc.

It should be noted that the following significant editorial changes compared to the previous edition

have been incorporated in this European Standard:
a) alignment to EN 13611:2018;
b) terms and definitions are aligned to EN 13611:2018.
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1 Scope

This document specifies the safety, construction and performance requirements for automatic shut-off

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

This document is 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 250 for use with one or more fuel

gases in accordance with EN 437.

This document is applicable to electrically operated valves and to valves actuated by fluids where the

control valves for these fluids are actuated electrically, but not to any external electrical devices for

switching the control signal or actuating energy.
An assessment method for valve designs is given by this document.

This document is also applicable to valves where the flow rate is controlled by external electrical

signals, either in discrete steps or proportional to the applied signal.

This document is also applicable to valves fitted with closed position indicator switches.

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

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

accordance with EN 13611:2019, Annexes K and L.
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 30 (all parts), Domestic cooking appliances burning gas

EN 298:2012, Automatic gas burner control systems for gas burners and gas burning appliances with or

without fans

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 desi

...

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