EN 161:2022

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

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.

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
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

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.
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.
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.
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.
1 Scope
EN 13611:2019, Clause 1 applies with the following modification and addition:
Modification:
st
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.
th
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.
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.
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
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.
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 interference. Any drift of the switch and actuating mechanism from
its setting shall not impair correct valve operation. Conformity with these requirements is determined by
the test according to 7.107.3.
6.2.103 Valve with modulating control
Flow rates of valves with modulating control shall be adjustable over the full range as stated in the
instructions. If the adjustment of one flow rate affects the setting of any other flow rate, this shall be
clearly indicated in the instructions for setting up. The setting of any flow rate shall require the use of
mechanical or electrical tools and shall be designed to discourage unauthorized adjustment.
NOTE For gas/air ratio controls see EN 88-1:2022 and EN 12067-2:2022.
6.2.104 Controls assembled to a valve
Other controls assembled to a valve shall not interfere with its shut-off function.
6.2.105 Balanced valves
The closure member of a balanced valve shall have a resulting force in the closing direction where the
sealing force is not decreased by the gas inlet pressure.
For a balanced valve with one port a resulting force in the closing direction shall remain, if the balancing
force is removed, and the closure member shall have the same closing direction as the flow direction
through the valve.
6.2.106 Closing and sealing
6.2.106.1 Closing and/or sealing by means of springs
If springs are used for closing and/or sealing the valve, they shall be designed according to
EN 13906-1:2013 or EN 13906-2:2013 for static and dynamic loading.
6.2.106.2 Other means for closing and/or sealing
6.2.106.2.1 General
This clause defines a method for the assessment of other means for closing and/or sealing in automatic
shut-off valves.
By this clause the term “class of control function A, B or C” is not related to the sealing force classes but
to the class of control function as described in 4.3.
Sealing force of valves shall be classified according to 4.1.
The basic risks of fire and explosion in a gas appliance as a result of uncontrolled gas flow requires a
control function class C system for the gas shut-off function. This is based on a comparison, made between
automatic burner controller and gas shut-off function, the class of control function of each of them being
considered equal.
Although this document is not based on a fault assessment approach as specified in EN 13611:2019, 6.6,
the combination of two automatic shut-off valves is considered equal to a control function class C. This
assumption is based on the construction and performance requirements of this document.
6.2.106.2.2 New designs for closing and/or sealing
New designs for closing and/or sealing shall fulfil at least the requirements of a control function class B.
In all cases the gas shut-off function shall be a control function class C.
During the testing, the valve shall fulfil the performance requirements of Clause 7.
New designs may consist of a combination of closure members, electronic controller, sensing elements,
actuators, lockout and reset.
Other means for closing and/or sealing shall be described in the design documentation.
For the assessment of the new design the requirements of this document shall be used in combination
with EN 13611:2019, 6.6. If this leads to aspects that are not described in this document, a failure mode
analysis on the new design shall be supplied with the design documentation.
This analysis shall describe the specific failure modes for the type of technology used in relation to the
following basic safety requirements:
a) closing function at power interruption;
b) leak tightness;
c) sealing force (ability to withstand backpressure, to be checked by testing or calculation);
d) closing force > friction force;
e) closing time including the influence to the automatic burner control system according to
EN 298:2022;
f) no uncontrolled opening of the automatic shut-off valve.
As a result of this failure mode analysis, additional constructional requirements shall be fulfilled and/or
additional faults compared to EN 13611:2019, Annex E shall be included into the fault assessment.
The outcome of the analysis shall provide a set of conditions under which the new design can be used in
an automatic shut-off valve. These conditions involve construction requirements, safety requirements,
performance requirements and test methods.
The fault reaction time shall be stated in the instructions.
Failure of mechanical parts adversely affecting the performance requirements of this document is
considered as an abnormal situation and shall therefore be considered as a first fault according to the test
method in EN 13611:2019, 6.6.
However, if mechanical parts are designed according to the relevant constructional requirements of
Clause 6 of this document, failure of these parts is not considered.
6.2.107 Additional requirements for shut-off function
6.2.107.1 Diaphragms that assist the shut-off function
Shut-off functions using a diaphragm to apply (part of) the closing force to the closure member shall be
designed in such a way that, when the diaphragm is damaged, the closure member closes and the
maximum internal leakage rate of the valve is limited to 1 dm /h. Conformity shall be verified by the
method given in 6.2.107.2.
6.2.107.2 Leakage test
Remove or rupture the part(s) assisting the shut-off function. De-energize the valve. Measure the internal
leakage rate of the valve according to 7.2.
6.3 Materials
6.3.1 General material requirements
Shall be according to EN 13611:2019, 6.3.1.
6.3.2 Housing
Shall be according to EN 13611:2019, 6.3.2.
6.3.3 Zinc alloys
Shall be according to EN 13611:2019, 6.3.3.
6.3.4 Springs
Shall be according to EN 13611:2019, 6.3.4.
6.3.5 Resistance to corrosion and surface protection
Shall be according to EN 13611:2019, 6.3.5.
6.3.6 Impregnation
Shall be according to EN 13611:2019, 6.3.6.
6.3.7 Seals for glands for moving parts
Shall be according to EN 13611:2019, 6.3.7.
6.3.101 Closure members
Closure members of valves above DN 25 shall either have a mechanical support (e.g. metallic) to
withstand the sealing force or shall be made of metal.
This requirement also applies to:
— all valves with a maximum inlet pressure above 15 kPa;
— parts transmitting the closing force.
The strength of the connection between closure members of a balanced valve shall be at least four
multiplied by the maximum inlet pressure multiplied by the total opening area of the closure members.
6.4 Gas connections
6.4.1 Making connections
Shall be according to EN 13611:2019, 6.4.1.
6.4.2 Connection sizes
Shall be according to EN 13611:2019, 6.4.2.
6.4.3 Threads
Shall be according to EN 13611:2019, 6.4.3.
6.4.4 Union joints
Shall be according to EN 13611:2019, 6.4.4.
6.4.5 Flanges
Shall be according to EN 13611:2019, 6.4.5.
6.4.6 Compression fittings
Shall be according to EN 13611:2019, 6.4.6.
6.4.7 Nipples for pressure test
Shall be according to EN 13611:2019, 6.4.7.
6.4.8 Strainers
Shall be according to EN 13611:2019, 6.4.8 with the following addition:
Class J valves shall incorporate an inlet strainer. The maximum strainer hole dimension shall not exceed
0,28 mm and it shall prevent the passage of a 0,2 mm diameter pin gauge.
6.5 Electrical parts of the control
6.5.1 General
Shall be according to EN 13611:2019, 6.5.1.
6.5.2 Switching elements
EN 13611:2019, 6.5.2 is not applicable.
NOTE Requirements for closed position indicator switches are given in 7.106.1.
6.5.3 Electrical components
6.5.3.1 Performance of electrical components
Shall be according to EN 13611:2019, 6.5.3.1.
6.5.3.2 Tests
Shall be according to EN 13611:2019, 6.5.3.2.
6.5.3.3 Sensing element
EN 13611:2019, 6.5.3.3 is not applicable.
6.5.3.4 Gas controls employing electrical components in the gas circuit
Shall be according to EN 13611:2019, 6.5.3.4.
6.6 Protection against internal faults for the purpose of functional safety
EN 13611:2019, 6.6 is not applicable.
6.101 Pneumatic and hydraulic actuating mechanisms
Pneumatically or hydraulically actuated valves shall be provided with protection to ensure that the
blockage of an orifice in the control system does not adversely affect the relevant performance
requirements as given in Clause 7.
If the performance of the actuating mechanism depends on the quality of compressed air or hydraulic
fluid, appropriate information shall be stated in the instructions.
7 Performance
7.1 General
Shall be according to EN 13611:2019, 7.1 with the following addition:
Valves shall close automatically when de-energized or in the absence of actuating energy.
The electrical control valve of pneumatic or hydraulic actuating mechanisms shall also meet these
requirements.
The closing of pneumatically or hydraulically actuated valves shall be ensured over the range from 85 %
to 110 % of the actuating pressure or pressure range as stated in the instructions.
Aspects coming from new designs for closing and/or sealing according to 6.2.106.2.2 shall be taken as
part of the relevant performance requirements, as specified in Clause 7.
All tests are conducted at room temperature, if not stated otherwise.
7.2 Leak-tightness
Shall be according to EN 13611:2019, 7.2.
7.3 Torsion and bending
Shall be according to EN 13611:2019, 7.3.
7.4 Rated flow rate
7.4.1 Requirement
Shall be according to EN 13611:2019, 7.4.1.
7.4.1.101 Valves with modulating control
Where opening and closing characteristics for valves with modulating control are stated in the
instructions, these shall be within ±10 % of the values stated.
7.4.1.102 Valves with step control
For valves with step control, where applicable, the maximum flow rate for each step as a percentage of
the fully open flow rate shall be stated in the instructions. It shall not be possible to adjust the maximum
flow rate for each step in excess of 1,1 times the stated value when tested to 7.4.2.
7.4.1.103 Valves with electrical control
When the flow rate changes in response to external electrical signals, it shall not, when tested to 7.4.2,
overshoot in either direction while attaining the new flow rate by more than 20 % of the flow rate at that
particular set point, or as stated in the instructions.
7.4.2 Test
Shall be according to EN 13611:2019, 7.4.2 with the following addition:
For valves with modulating or step control, verify the stated opening and closing characteristics at rated
voltage or current before and after the endurance test for conformity with 7.4.1.101 to 7.4.1.103.
7.4.3 Conversion of air flow rate
Shall be according to EN 13611:2019, 7.4.3.
7.5 Durability
Shall be according to EN 13611:2019, 7.5.
7.6 Performance tests for electronic controls
EN 13611:2019, 7.6 is not applicable.
7.7 Long-term performance for electronic controls
EN 13611:2019, 7.7 is not applicable.
7.8 Data exchange
EN 13611:2019, 7.8 is not applicable.
NOTE Valves are actuators and safety functions are hard wired.
7.101 Closing function
7.101.1 Requirement
Valves shall close automatically on reducing the voltage or current to 15 % of the minimum rated value.
Valves with pneumatic or hydraulic actuating mechanisms shall close automatically on reducing the
voltage or current to 15 % of the minimum rated voltage of the control valve.
Valves shall close automatically on removal of the voltage or current of between 15 % of the minimum
rated value and the maximum rated value increased by the tolerance according to 7.1.
In all cases, the closing time shall be in accordance with 7.104.
7.101.2 Test of closing function
Energize the valve at the maximum rated voltage or current and at the maximum actuating pressure, if
applicable. Slowly reduce the voltage or current to 15 % of the minimum rated value. Verify that the valve
has closed.
Energize the valve at the maximum rated voltage or current and at the maximum actuating pressure, if
applicable. Increase the voltage or current to the maximum rated value increased by the tolerance
according to 7.1, keeping the actuating pressure, if any, unchanged. De-energize the valve and verify that
it has closed.
Energize the valve at the maximum rated voltage or current and at the maximum actuating pressure, if
applicable. Reduce the voltage or current to a value between 15 % of the minimum rated value and the
maximum rated value decreased by the tolerance according to 7.1, keeping the actuating pressure, if any,
unchanged. De-energize the valve and verify that it has closed. Conduct this test at 3 different voltages or
currents between 15 % of the minimum rated value and the maximum rated value decreased by the
tolerance according to 7.1.
7.102 Closing force
7.102.1 Requirement
Valves with sealing force independent of the closing force (e.g. ball, guillotine valves etc.) shall have a
closing force of:
— at least 5 times the value of the frictional force where the frictional force is up to and including 5 N;
— at least 2,5 times the value of the frictional force but at least 25 N where the frictional force is
above 5 N.
The frictional force is measured in the ungreased condition.
This requirement also applies to disc-on-seat valves with an inlet pressure above 50 kPa.
7.102.2 Test of closing force
Measure the minimum closing force over the travel of the closure member from the open position to the
closed position.
Remove the spring(s) providing the closing force from the valve and measure the maximum force
required to move the closure member from the open position to the closed position.
7.103 Delay time and opening time
7.103.1 Requirement
The delay time and the opening time shall be:
— within ±20 % of the value as stated in the instructions for times above 1 s;
— less than 1 s for stated times ≤ 1 s.
7.103.2 Test of delay time and opening time
Measure the time interval between energizing the valve and the start of the release of the closure
member.
Measure the time interval between energizing the valve and the attainment of a flow rate equal to 80 %
of the rated flow rate.
Conduct the tests under the following conditions, allowing the de-energized valve to reach thermal
equilibrium before conducting the tests:
— at the maximum inlet pressure, at the maximum rated voltage or current in
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