IEC 60730-2-8:2025

IEC 60730-2-8 ®
Edition 4.0 2025-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Automatic electrical controls –
Part 2-8: Particular requirements for electrically operated water valves, including
mechanical requirements
Dispositifs de commande électrique automatiques –
Partie 2-8: Exigences particulières pour les électrovannes hydrauliques, y
compris les exigences mécaniques
ICS 97.120  ISBN 978-2-8327-0427-1

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or
by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either
IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright
or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local
IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the
The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary.
variety of criteria (reference number, text, technical With a subscription you will always have access to up to date
committee, …). It also gives information on projects, content tailored to your needs.

replaced and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English
details all new publications released. Available online and and French, with equivalent terms in 25 additional languages.
once a month by email. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer
Service Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC -  IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications gratuitement tous les aperçus des publications, symboles
IEC en utilisant différents critères (numéro de référence, graphiques et le glossaire. Avec un abonnement, vous aurez
texte, comité d’études, …). Elle donne aussi des toujours accès à un contenu à jour adapté à vos besoins.
informations sur les projets et les publications remplacées
ou retirées. Electropedia - www.electropedia.org
Le premier dictionnaire d'électrotechnologie en ligne au
IEC Just Published - webstore.iec.ch/justpublished monde, avec plus de 22 500 articles terminologiques en
Restez informé sur les nouvelles publications IEC. Just anglais et en français, ainsi que les termes équivalents
Published détaille les nouvelles publications parues. dans 25 langues additionnelles. Egalement appelé
Disponible en ligne et une fois par mois par email. Vocabulaire Electrotechnique International (IEV) en ligne.

Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-
nous: sales@iec.ch.
– 2 – IEC 60730-2-8:2025 © IEC 2025
CONTENTS
FOREWORD . 4
1 Scope . 7
2 Normative references . 9
3 Terms and definitions . 9
4 General . 12
5 Required technical information . 13
6 Protection against electric shock . 15
7 Provision for protective earthing . 16
8 Terminals and terminations . 16
9 Constructional requirements . 16
10 Threaded parts and connections . 17
11 Creepage distances, clearances and distances through solid insulation . 17
12 Components . 18
13 Fault assessment on electronic circuits. 18
14 Moisture and dust resistance . 18
15 Electric strength and insulation resistance . 18
16 Heating . 18
17 Manufacturing deviation and drift . 19
18 Environmental stress . 20
19 Endurance . 20
20 Mechanical strength . 21
21 Resistance to heat, fire and tracking . 24
22 Resistance to corrosion . 24
23 Electromagnetic compatibility (EMC) requirements – Emission . 24
24 Normal operation . 25
25 Electromagnetic compatibility (EMC) requirements – Immunity . 25
26 Abnormal operation tests . 25
Annex H (normative) Requirements related to functional safety . 29
Annex R (informative) National differences relevant in the United States of America . 34
Annex S (informative) National differences relevant in Japan . 35
Annex T (informative) National differences relevant in Canada . 36
Annex AA (informative) Relation between different flow coefficients . 37
Annex BB (informative) Arrangement for the measurement of transient pressures
caused by water valves . 38
Annex CC (normative) Long term pressure test for thermoplastic bodied valves. 41
Annex DD (normative) Torque test . 43
Annex EE (informative) Arrangement for the measurement of transient pressures
caused by water valves with a declared pressure of up to and including 1,0 MPa
(10 bar) . 47
Bibliography . 49

Figure BB.1 – Transient pressure measurement test rig schematic diagram . 39
Figure DD.1 – Arrangements for carrying out the torque test . 43

Figure EE.1 – Transient pressure measurement test rig for valves with a declared
pressure of up to and including 1,0 MPa (10 bar) schematic diagram . 47

Table 1 – Required technical information and methods of providing these information . 13
Table 101 – Nominal size and thread size of end-connections . 17
Table 17 – Maximum heating temperatures . 19
Table 102 – Torque test requirements for metal valves with internal threaded end-
connections . 23
Table 103 – Torque test requirements for metal valves with external threaded end-
connections . 24
Table CC.1 – Test requirements for valves intended for uses other than the control of
water for tap and shower outlets . 41
Table CC.2 – Test requirements for valves intended for the control of water for tap and
shower outlets . 42
Table DD.1 – Required torque for the test . 44
Table DD.2 – Tightening torque in newton metres (Nm) for bolts and screws for
adaptors . 46

– 4 – IEC 60730-2-8:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –

Part 2-8: Particular requirements for electrically operated water valves,
including mechanical requirements

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60730-2-8 has been prepared by IEC technical committee 72: Automatic electrical controls.
It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2018 and
Amendment 1:2021. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) adoption of IEC 60730-1:2022 with all of its significant changes to IEC 60730-1:2013,
IEC 60730-1:2013/AMD1:2015 and IEC 60730-1:2013/AMD2:2020.

The text of this International Standard is based on the following documents:
Draft Report on voting
72/1478/FDIS 72/1482/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 60730 series, under the general title: Automatic electrical controls,
can be found on the IEC website.
This part 2-8 is intended to be used in conjunction with IEC 60730-1. It was established on the
basis of the sixth edition of that standard (2022). Consideration may be given to future editions
of, or amendments to, IEC 60730-1.
This part 2-8 supplements or modifies the corresponding clauses in IEC 60730-1, so as to
convert that publication into the IEC standard: Particular requirements for electrically operated
water valves, including mechanical requirements.
Where this part 2-8 states "addition", "modification" or "replacement", the relevant requirement,
test specification or explanatory matter in part 1 should be adapted accordingly.
Where no change is necessary, part 2-8 indicates that the relevant clause or subclause applies.
In the development of a fully international standard it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The reader's attention is drawn to the fact that Annex R to Annex T list all of the "in-some-
country" clauses on differing practices of a less permanent nature relating to the subject of this
document.
In this publication:
1) The following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– notes: in smaller roman type.
– Defined terms: bold type.
2) Subclauses, notes or items which are additional to those in Part 1 are numbered starting
from 101, additional annexes are lettered AA, BB, etc.

– 6 – IEC 60730-2-8:2025 © IEC 2025
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
AUTOMATIC ELECTRICAL CONTROLS –

Part 2-8: Particular requirements for electrically operated water valves,
including mechanical requirements

1 Scope
Replacement:
This document applies to electrically operated water valves
• for use in, on, or in association with equipment for household appliance and similar use;
NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" and "control" means
"electrically operated water valve".
EXAMPLE 1 Electrically operated water valves for appliances within the scope of IEC 60335.
• for building automation within the scope of ISO 16484 series and IEC 63044 series
(HBES/BACS);
EXAMPLE 2 Independently mounted water valves, controls in smart grid systems and controls for building
automation systems within the scope of ISO 16484-2.
• for equipment that is used by the public, such as equipment intended to be used in shops,
offices, hospitals, farms and commercial and industrial applications;
EXAMPLE 3 Electrically operated water valves for commercial catering, heating and air-conditioning equipment.
• that are smart enabled electrically operated water valves;
EXAMPLE 4 Smart grid control, remote interfaces and controls of energy-consuming equipment including computer
or smart phone.
• that are AC or DC powered electrically operated water valves with a rated voltage not
exceeding 690 V AC or 600 V DC;
• used in, on, or in association with equipment that uses electricity, gas, oil, solid fuel, solar
thermal energy, etc., or a combination thereof;
• utilized as part of a control system or controls which are mechanically integral with
multifunctional controls having non-electrical outputs;
• using NTC or PTC thermistors and to discrete thermistors, requirements for which are
contained in Annex J of Part 1;
• responsive to or controlling such characteristics as temperature, pressure, passage of time,
humidity, light, electrostatic effects, flow, or liquid level, current, voltage, acceleration, or
combinations thereof;
• in which actuators and valve bodies are designed to be fitted to each other.
• as well as manual controls when such are electrically or mechanically integral with automatic
controls.
NOTE 2 Requirements for manually actuated mechanical switches not forming part of an automatic control are
contained in IEC 61058-1-1.
– 8 – IEC 60730-2-8:2025 © IEC 2025
This document applies to
– the inherent safety of electrically operated water valves, and
– functional safety of electrically operated water valves and safety related systems,
– controls where the performance (for example the effect of EMC phenomena) of the product
can impair the overall safety and performance of the controlled system,
– the operating values, operating times, and operating sequences where such are associated
with equipment safety.
This document specifies the requirements for construction, operation and testing of electrically
operated water valves used in, on, or in association with an equipment.
This document contains requirements for electrical features of water valves and requirements
for mechanical features of valves that affect their intended operation.
This document does not
• apply to electrically operated water valves intended exclusively for industrial process
applications unless explicitly mentioned in the relevant Part 2 or the equipment standard.
However, this document can be applied to evaluate automatic electrical controls intended
specifically for industrial applications in cases where no relevant safety standard exists.
• apply to
– electrically operated water valves of nominal connection size above DN 50;
– electrically operated water valves for admissible nominal pressure rating above
1,6 MPa;
– food dispensers;
– detergent dispensers;
– steam valves;
• take into account the response value of an automatic action of a electrically operated
water valve, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the
protection of the user, or surroundings, the value defined in the appropriate equipment
standard or as determined by the manufacturer will apply.
• address the integrity of the output signal to the network devices, such as interoperability
with other devices unless it has been evaluated as part of the control system.
• cover the prevention of contamination of drinking water as a result of contact with materials.
Throughout this document, where it can be used unambiguously, the term:
– "valve" is used to denote an electrically operated water valve (including actuator and
valve body assembly);
– "actuator" means "electrically operated mechanism or prime mover";
– "valve body" means "valve body assembly";
– "equipment" includes "appliance" and "control system".

2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60730-1:2022, Automatic electrical controls – Part 1: General requirements
ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads – Part 1:
Dimensions, tolerances and designation
ISO 65:1981, Carbon steel tubes suitable for screwing in accordance with ISO 7-1
ISO 228-1:2000, Pipe threads where pressure-tight joints are not made on the threads – Part 1:
Dimensions, tolerances and designation
ISO 630-2:2011, Structural steels – Part 2: Technical delivery conditions for structural steels
for general purposes
ISO 1179-1:2013, Connections for general use and fluid power – Ports and stud ends with
ISO 228-1 threads with elastomeric or metal-to-metal sealing – Part 1: Threaded ports
ISO 4144:2003, Pipework – Stainless steel fittings threaded in accordance with ISO 7-1
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.2 Definitions of types of control according to purpose
3.2.13
electrically operated valve
Additional Note to entry:
Note 1 to entry: A semi-automatic valve that is opened manually and closes automatically or vice versa is also
covered by this definition.
Additional definitions:
3.2.13.101
valve
device consisting of an actuator connected to a valve body assembly and used to stop or
regulate the flow of fluid by the closure or partial closure of an orifice
3.2.13.102
water valve
valve intended to be connected to a water supply and to control water flow
3.2.13.103
heating-water valve
valve intended to control the water circulation in heating systems
___________
Withdrawn.
Withdrawn. A newer edition was published in 2021, but the listed edition applies.

– 10 – IEC 60730-2-8:2025 © IEC 2025
3.2.13.104
actuator
electrically operated mechanism or prime mover used to effect the opening or closing action of
a valve
Note 1 to entry: An actuator can be integral with the valve, fixed to the valve body assembly or delivered as a
separate component.
Note 2 to entry: An actuator can also include the valve and closure member.
3.2.13.105
valve body assembly
assembly comprising the valve body, inlet and outlet end connections, the valve seat,
closure member and stem or shaft
Note 1 to entry: In some cases, the stem and closure member can be part of the actuator.
3.2.13.106
valve body
part of the valve body assembly which is the main pressure boundary
Note 1 to entry: It provides the water flow passage-ways with end connections.
3.2.13.107
nominal size
numerical designation of size which is common to all components in a fluid-conducting system
other than components designated by outside diameter or by thread size
Note 1 to entry: It can be designated by "DN" followed by a convenient round number, for reference purposes only.
Note 2 to entry: Some older international standards refer to nominal size as nominal diameter but, for the purpose
of this document, the two terms are synonymous.
3.2.13.108
nominal pressure rating
numerical designation of pressure rating
Note 1 to entry: It can be designated by the letters "PN" (also referred to as the pressure number) followed by a
convenient round number, for reference purposes only.
3.2.13.109
end-connection
valve body configuration provided to make a pressure-tight joint to the fluid-conducting system
3.2.13.110
valve seat
surface of the orifice within the valve which makes full contact with the closure member
3.2.13.111
closure member
movable part of the valve which is positioned in the flow path to modify the rate of flow through
the valve
Note 1 to entry: A closure member can be a plug, ball, disc, vane, gate, etc.
3.2.13.112
stem
component which connects the actuator to, and positions, the closure member
Note 1 to entry: For rotary valves, the word "shaft" should be used in place of "stem".
Note 2 to entry: In some controls, the stem can be part of the actuator.

3.2.13.113
fitting
any device such as a reducer, expander, elbow, or T-piece which is attached directly to an
end-connection of the valve body assembly
3.3 Definitions relating to the function of controls
Additional definitions:
3.3.101
on-off valve
valve which is open or closed, without any intermediate positions
3.3.102
normally closed valve
valve which is closed when not electrically energized
3.3.103
normally open valve
valve which is open when not electrically energized
3.3.104
modulating valve
valve which has a variable flow rate between predetermined flow limits
3.3.105
diverting valve
valve with one or more inputs and outputs which can permit flow from any combination of inputs
to outputs
3.3.106
closed position
position of the closure member when there is no water flow from the outlet side of the valve
3.3.107
travel
displacement of the closure member from the closed position
3.3.108
rated travel
displacement of the closure member from the closed position to the full open position
3.3.109
open position
position of the closure member when there is a flow of water from the outlet side of the valve
3.3.110
fully open position
position of the closure member so that the amount of water flowing through the valve is in
accordance with the rated flow rate
3.3.111
flow rate
volume of water flowing through the valve in unit time

– 12 – IEC 60730-2-8:2025 © IEC 2025
3.3.112
rated flow rate
flow rate at the rated travel under standard reference conditions of temperature and pressure
declared at a given pressure difference
3.3.113
flow factor
factor specifying the amount of water which can pass through the valve at a specified pressure
difference
Note 1 to entry: The flow factor can be referred to as flow coefficient.
Note 2 to entry: The relationship between the different flow factors in use is indicated in Annex AA.
3.3.114
maximum operating pressure differential
declared maximum difference in pressure between inlet and outlet ports of the valve against
which the actuator can operate the closure member
3.3.115
minimum operating pressure differential
declared minimum pressure difference at which the valve opens or closes
3.3.116
water hammer
excessive transient pressure which can occur in some water supply systems as a result of
closing a valve as intended
3.3.117
transient pressure
short-time pressure surge exceeding the normal stable supply pressure in the closed condition
of the valve
3.3.118
valve with anti-water hammer characteristics
valve that does not cause an excessive pressure drop when opening and no excessive
transient pressure when closing if connected directly, without special precautions to water
supply mains applications where water-hammer can occur
3.13 Miscellaneous definitions
Additional definitions:
3.13.101
water for tap and shower outlets
water intended to supply a bath, shower, bidet, wash basin, kitchen sink, or other such taps
that discharge into a drainage system
4 General
This clause of Part 1 is applicable except as follows.
4.3 General notes on tests
4.3.2 Conditions of test
4.3.2.2 Addition:
Unless otherwise specified in this document, water temperature for the tests shall be maintained
at a temperature of (20 ± 5) °C.
5 Required technical information
This clause of Part 1 is applicable except as follows.
5.2 Methods of providing technical information
This clause of Part 1 is applicable except as follows.
Table 1 – Required technical information and methods of providing these information
Clause or
Information Method
subclause
Modifications:
6 Purpose of control 3.2, D or E
3.3.101,
NOTE 1 Electrically operated water valves can be declared as water
3.3.102,
valve, heating-water valve, on-off valve, normally closed valve, normally
3.3.103,
open valve, modulating valve, diverting valve, valve with anti-water
3.3.104,
hammer characteristics.
3.3.105,
3.3.118,
4.3.4.2,
4.3.4.5,
19.15
8 The type of load controlled by each circuit (for valves with switching Clause 16, C
b
Clause 19,
devices) such as substantially resistive, resistive or inductive, declared
Table 18,
specific load, 20 mA load, declared motor load and pilot duty load
Table 19,
Table 20,
23.2.2,
26.2.3,
15 Temperature limits of the electrically operated water valve, if the minimum 16.5, 16.7, D
value (T ) lower than 0 °C or the maximum value (T ) other than 55 °C 19.3
min max
Preferred values of T are 30 °C, 55 °C, 70 °C, 85 °C, 105 °C, 125 °C,
max
150 °C. Preferred values of T are 0 °C, −10 °C, −20 °C, −30 °C, and −40 °C
min
19 Not applicable
20 13.1.3.3, X
Number of automatic cycles (A) for each automatic action.
Table 14,
Preferred values are: 300 000 cycles; 200 000 cycles; 100 000 cycles; 19.7.5,
30 000 cycles; 20 000 cycles; 10 000 cycles; 6 000 cycles.
19.8.4,
NOTE 2 For electrically operated water valves having more than one
automatic action, a different value can be declared for each.
21 Not applicable
22 Type of disconnection or interruption provided by each circuit (for 3.4.1, 3.4.2, X
electrically operated water valves with switching devices) 3.4.3, 3.4.4
30 Not applicable
31 Not applicable
32 Not applicable
33 3.6 D or E
Type 1 action or type 2 action (for valves with switching devices)
34 Additional features of type 1 action or type 2 actions (for valves with 9.4 D or E
switching devices)
35 Manufacturing deviation and condition of test (electrical, mechanical and 3.11.1, X
thermal) appropriate to deviation (for valves with switching devices). 9.4.3, H.17,
19.14
– 14 – IEC 60730-2-8:2025 © IEC 2025
Clause or
Information Method
subclause
36 Drift (for valves with switching devices) 3.11.2, X
9.4.3, H.17,
18.2.4
37 Not applicable
38 Not applicable
41 Not applicable
44 Intended pollution degree of the actuator Annex F D or E
Addition:
101 Power consumption in watts or in VA or current rating C
102 Maximum operating pressure differential in MPa (or in bar) 3.3.114 D
103 Minimum operating pressure differential in MPa (or in bar) 3.3.115 D
104 3.3.28, 16.5 D
Maximum working pressure in MPa (or in bar)
i), 20.101.2,
20.101.3,
20.101.4
105 Flow direction indicated by an arrow (on valve body) C
106 4.3.2.2, D
Maximum water temperature in °C
16.5 g),
16.5 h)
107 For valves intended to be cleaned in normal use, the method of 6.1.101 D
disassembling, cleaning, reassembling and maintenance
108 If valve is intended to be used in water supply installations where water 3.3.116, X
hammer can occur 20.101.4
109 9.3.101 X
Material identification of wetted parts
110 9.101, D
Valve features
Annex AA
111 Plastic valves intended to be hand-tightened 20.102.5 D
112 Valves incorporated in those household appliances covered by the 26.1.103 D
IEC 60335 series where the loss of water supply or dry valve is considered
as an abnormal use condition
113 For valves identified under item 112, details of any limitation of operating 26.1.103 D
time (duty cycle)
Clause or
Information Method
subclause
114 Water valve intended to be used in accordance with IEC 60335 20.101.4 D
115 If the valve is intended to be used for the control of water for tap and shower 3.13.101, D
outlets 20.101.5.2,
20.101.5.3,
Additional footnotes:
The water valve itself is type 1 action.
Not applicable in Canada, Japan and the USA.
Not applicable in Canada, Japan and the USA.
Electrically operated water valves are subjected to a minimum of 6 000 cycles.
Water valves are usually classified according to the values of maximum working pressure of 0,1 MPa, 0,6 MPa,
0,86 MPa, 1,0 MPa, 1,6 MPa or higher.
Water valves are usually classified according to the maximum temperature of the controlled water as follows:
– cold water supply with a maximum temperature of 25 °C,
– hot water supply with a maximum temperature of 90 °C,
– circulation heating water with a maximum temperature of between 50 °C and 120 °C,
– water valves with a maximum water temperature other than above.
Includes the material identification of all internal parts in contact with water such as the body and sealing
material.
Features of electrically operated water valves are the following:
– size and capacity: to be specified in dimension of the inlet and outlet end-connections and flow factor,
– type of operation: direct or pilot controlled with or without minimum pressure differential limit,
– function: description of function regarding the number of water connections and the valve position when
de-energized,
– construction of the closure member: direct operated or pilot valve controlled diaphragm or piston-operated
poppet type or spool type closing member,
– construction of the actuator: electromagnetic; electric motor; electrically heated wax or bi-metal controlled
actuator with actuator stem in contact with or shielded from the water.

5.4 Additional requirements for marking
5.4.3 Markings for installation and servicing
This clause of Part 1 is applicable except as follows.
5.4.3.1 Not applicable.
6 Protection against electric shock
This clause of Part 1 is applicable except as follows.
6.1 General requirements
6.1.3 Addition:
For class II water valves, reinforced insulation shall not be in direct contact with the water.

– 16 – IEC 60730-2-8:2025 © IEC 2025
Additional subclause:
6.1.101 Valves which are declared capable of being cleaned in normal use shall be so
constructed that there is adequate protection against accidental contact with live parts during
cleaning (Table 1, requirement 107).
Compliance is checked by inspection and by a simulated cleaning operation as described below:
If the actuator can be removed from the valve body assembly without disconnecting the
electrical wiring, the removed actuator shall still meet the requirements for its class of
construction. Removal shall not affect electrical characteristics.
If the actuator can only be removed from the valve body assembly after removing the electrical
wiring:
a) the inspection and simulated cleaning operation shall be made in accordance with the
manufacturer's instructions in the documentation;
b) if a plug connector is used, this removal shall be impossible before the plug connector is
disconnected. Plug connectors for actuators with earth connection shall be so designed
that the disconnection of the electrical supply takes place prior to the disconnection of the
earthed wire.
NOTE For plug connectors, reference is made to ISO 4400 and ISO 6952.
7 Provision for protective earthing
This clause of Part 1 is applicable.
8 Terminals and terminations
This clause of Part 1 is applicable except as follows.
8.2 Terminals and terminations for internal conductors
Additional subclause:
8.2.101 Additional requirements for electrically operated water valves
The requirements of 8.2 also apply to terminals and terminations:
– of water valves which are intended to be used for internal wiring which is external to the
equipment,
– designed to accept special connectors such as the plug connectors described in ISO 4400
and ISO 6952,
– designed for connection of pilot duty loads.
9 Constructional requirements
This clause of Part 1 is applicable except as follows.
9.3 Actuation and operation
Modification:
Replace "controls" with "valves with auxiliary switches" throughout entire 9.3 and its
subdivisions.
Replacement:
9.3.9 Manually actuated mechanisms
Operation of a manually actuated mechanism of a valve shall not subject parts to distortion or
damage to the extent that their intended function is impaired.
Compliance is checked by operation and inspection.
Operating parts shall be separated from conductors to be connected to the valve by barriers or
by their physical location so that such operating parts are not obstructed by stowed wiring.
Compliance is checked by operation and inspection.
Additional subclause:
9.3.101 Separation of wetted parts from electrical parts
There shall be no leakage of water to the electrical parts.
Compliance is checked by inspection after the pressure test of 20.101.2.
Additional subclause:
9.101 Nominal size and thread size of end-connections
The nominal size and the thread size of end-connections are given in Table 101.
Table 101 – Nominal size and thread size of end-connections
Designation of thread Nominal size
inch
1/8 DN 6
1/4 DN 8
3/8 DN 10
1/2 DN 15
3/4 DN 20
1 DN 25
1 ¼ DN 32
1 ½ DN 40
2 DN 50
NOTE The designation "DN" followed by the appropriate convenient round number is normally only loosely related
to manufacturing dimensions and corresponds for reference purposes only approximately to the internal diameter
expressed in millimetres of the water system.

10 Threaded parts and connections
This clause of Part 1 is applicable.
11 Creepage distances, clearances and distances through solid insulation
This clause of Part 1 is applicable.

– 18 – IEC 60730-2-8:2025 © IEC 2025
12 Components
This clause of Part 1 is applicable.
13 Fault assessment on electronic circuits
This clause of Part 1 is applicable except as follows.
13.1 Fault assessment for inherent safety
13.1.3 Component fault assessment
13.1.3.2 Test procedure
Modification:
Add the following sentence to the end of item h).
A further option for integrated and incorporated valves is to require, for example, further
shielding, in the appliance or equipment.
14 Moisture and dust resistance
This clause of Part 1 is applicable.
15 Electric strength and insulation resistance
This clause of Part 1 is applicable.
16 Heating
This clause of Part 1 is applicable except as follows.
16.4 Modification:
Requirement 1) of item c) is not applicable.
Additional subclauses:
16.4.101 If stalling of the motorized electric actuator drive shaft is part of normal operation,
then the drive shaft of motorized actuators shall be stalled, and temperatures measured after
steady-state conditions are reached. The temperatures shall comply with the limits of Table 17.
In addition, if any protective device provided does not cycle under stalled conditions, then the
electric actuator is also considered to comply with the requirements of the blocked mechanical
output test of 26.1.2.
16.4.102 If stalling of the electric actuator drive shaft is not part of normal operation, then
Table 17 limits do not apply during stalling. The electric actuator shall comply with the
requirements of the blocked mechanical output test of 26.1.2.
Replacement:
16.5 Actuators for valves are tested at room temperature or in an appropriate heating and
refrigerating apparatus such that the conditions in a) to i) are obtained.

Except for electrically operated water valves submitted in or with appliances, the test shall
be conducted in an environment protected from drafts. Natural convection is permitted.
a) For the test of condition g), the ambient temperature of the actuator is maintained in the
range of 15 °C to 30 °C, the resulting measured temperature being corrected to a 25 °C
reference.
b) For the test of condition h), the ambient temperature of the actuator is maintained at T .
max
c) If
...