Automatic electrical controls for household and similar use - Part 2-8: Particular requirements for electrically operated water valves, including mechanical requirements

EC 60730-2-8:2018 applies to electrically operated water valves for use in, on or in association with equipment for household and similar use, including heating, air-conditioning and similar applications. The equipment can use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof. This document is applicable to electrically operated water valves for building automation within the scope of ISO 16484. This document also applies to automatic electrically operated water valves for equipment that can be used by the public, such as equipment intended to be used in shops, offices, hospitals, farms and commercial and industrial applications. This document does not apply to electrically operated water valves intended exclusively for industrial process applications unless explicitly mentioned in the relevant equipment standard. This document applies to electrically operated water valves powered by primary or secondary batteries, requirements for which are contained within the standard, including Annex V. This document does not cover the prevention of contamination of drinking water as a result of contact with materials. This document applies to the inherent safety, to the operating values, operating times and operating sequences where such are associated with equipment safety, and to the testing of automatic electrical control devices used in, on or in association with, household and similar 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 is also applicable to electrically operated water valves for appliances within the scope of the IEC 60335 series of standards. This document does not 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;
- electrically operated water valves designed exclusively for industrial applications. This document applies to electrically operated water valves, 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. This document also applies to actuators and to valve bodies which are designed to be fitted to each other. This document applies to individual valves, valves utilized as part of a system and valves mechanically integral with multi-functional controls having non-electrical outputs. This document applies to AC or DC powered electrically operated water valves with a rated voltage not exceeding 690 V AC or 600 V DC. This document does not take into account the response value of an automatic action of a valve, if such a response value is dependent upon the method of mounting the valve 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 shall apply. This document applies also to electrically operated water valves incorporating electronic devices, requirements for which are contained in

Automatische elektrische Regel- und Steuergeräte für den Hausgebrauch und ähnliche Anwendungen - Teil 2-8: Besondere Anforderungen an elektrisch betriebene Wasserventile, einschließlich mechanischer Anforderungen

Dispositifs de commande électrique automatiques à usage domestique et analogue - Partie 2-8: Règles particulières pour les électrovannes hydrauliques, y compris les prescriptions mécaniques

NEW!IEC 60730-2-8:2018 est disponible sous forme de IEC 60730-2-8:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

Avtomatske električne krmilne naprave za uporabo v gospodinjstvu in za podobno uporabo - 2-8. del: Posebne zahteve za električne vodne ventile, vključno z mehanskimi zahtevami

General Information

Status
Published
Publication Date
03-May-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Apr-2021
Due Date
20-Jun-2021
Completion Date
04-May-2021

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SLOVENSKI STANDARD
SIST EN IEC 60730-2-8:2021
01-junij-2021
Nadomešča:
SIST EN 60730-2-8:2002
SIST EN 60730-2-8:2002/A1:2003
Avtomatske električne krmilne naprave za uporabo v gospodinjstvu in za podobno
uporabo - 2-8. del: Posebne zahteve za električne vodne ventile, vključno z
mehanskimi zahtevami

Automatic electrical controls for household and similar use - Part 2-8: Particular

requirements for electrically operated water valves, including mechanical requirements

Automatische elektrische Regel- und Steuergeräte für den Hausgebrauch und ähnliche

Anwendungen - Teil 2-8: Besondere Anforderungen an elektrisch betriebene
Wasserventile, einschließlich mechanischer Anforderungen
Dispositifs de commande électrique automatiques à usage domestique et analogue -

Partie 2-8: Règles particulières pour les électrovannes hydrauliques, y compris les

prescriptions mécaniques
Ta slovenski standard je istoveten z: EN IEC 60730-2-8:2020
ICS:
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
SIST EN IEC 60730-2-8:2021 en

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

---------------------- Page: 1 ----------------------
SIST EN IEC 60730-2-8:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 60730-2-8:2021
EUROPEAN STANDARD EN IEC 60730-2-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 97.120 Supersedes EN 60730-2-8:2002 and all of its
amendments and corrigenda (if any)
English Version
Automatic electrical controls for household and similar use - Part
2-8: Particular requirements for electrically operated water
valves, including mechanical requirements
(IEC 60730-2-8:2018)

Dispositifs de commande électrique automatiques à usage Automatische elektrische Regel- und Steuergeräte - Teil 2-

domestique et analogue - Partie 2-8: Règles particulières 8: Besondere Anforderungen an elektrisch betriebene

pour les électrovannes hydrauliques, y compris les Wasserventile, einschließlich mechanischer Anforderungen

prescriptions mécaniques (IEC 60730-2-8:2018)
(IEC 60730-2-8:2018)

This European Standard was approved by CENELEC on 2018-10-02. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60730-2-8:2020 E
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SIST EN IEC 60730-2-8:2021
EN IEC 60730-2-8:2020 (E)
European foreword

The text of document 72/1077/CDV, future edition 3 of IEC 60730-2-8, prepared by IEC/TC 72

"Automatic electrical controls" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 60730-2-8:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2020-11-01

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-05-01

document have to be withdrawn

This document supersedes EN 60730-2-8:2002 and all of its amendments and corrigenda (if any).

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

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

This document has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association.
Endorsement notice

The text of the International Standard IEC 60730-2-8:2018 was approved by CENELEC as a

European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN IEC 60730-2-8:2021
EN IEC 60730-2-8:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Annex ZA of EN 60730-1 is applicable with the following additions:
Publication Year Title EN/HD Year
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 - Pipe threads where pressure-tight joints EN ISO 228-1 -
are not made on the threads -- Part 1:
Dimensions, tolerances and designation
ISO 630 - Structural steels - Plates, wide flats, bars, - -
sections and profiles
ISO 1179-1 - Connections for general use and fluid EN ISO 1179-1 -
power – Ports and stud ends with ISO 228-
1 threads with elastomeric or metal-to-
metal sealing – Part 1: Threaded ports
ISO 4144 - Pipework - Stainless steel fittings threaded - -
in accordance with ISO_7-1
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SIST EN IEC 60730-2-8:2021
---------------------- Page: 6 ----------------------
SIST EN IEC 60730-2-8:2021
IEC 60730-2-8
Edition 3.0 2018-08
INTERNATIONAL
STANDARD
Automatic electrical controls –
Part 2-8: Particular requirements for electrically operated water valves,
including mechanical requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.120 ISBN 978-2-8322-5917-7

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 60730-2-8:2021
– 2 – IEC 60730-2-8:2018 © IEC 2018
CONTENTS

FOREWORD ......................................................................................................................... 4

1 Scope and normative references .................................................................................... 7

2 Terms and definitions .................................................................................................... 9

3 General requirements .................................................................................................. 13

4 General notes on tests ................................................................................................. 13

5 Rating ......................................................................................................................... 13

6 Classification ............................................................................................................... 13

7 Information .................................................................................................................. 16

8 Protection against electric shock .................................................................................. 17

9 Provision for protective earthing ................................................................................... 18

10 Terminals and terminations .......................................................................................... 18

11 Constructional requirements ........................................................................................ 19

12 Moisture and dust resistance ....................................................................................... 19

13 Electric strength and insulation resistance .................................................................... 19

14 Heating ....................................................................................................................... 20

15 Manufacturing deviation and drift ................................................................................. 21

16 Environmental stress ................................................................................................... 21

17 Endurance ................................................................................................................... 22

18 Mechanical strength ..................................................................................................... 23

19 Threaded parts and connections .................................................................................. 26

20 Creepage distances, clearances and distances through insulation ................................ 26

21 Resistance to heat, fire and tracking ............................................................................ 26

22 Resistance to corrosion ............................................................................................... 26

23 Electromagnetic compatibility (EMC) requirements – Emission ...................................... 26

24 Components ................................................................................................................ 27

25 Normal operation ......................................................................................................... 27

26 Electromagnetic compatibility (EMC) requirements – Immunity...................................... 27

27 Abnormal operation ..................................................................................................... 27

28 Guidance on the use of electronic disconnection .......................................................... 30

Annex H (normative) Requirements for electronic controls .................................................. 31

Annex AA (informative) Relation between different flow coefficients .................................... 36

Annex BB (normative) Arrangement for the measurement of transient pressures

caused by water valves ....................................................................................................... 37

Annex CC (normative) Long term pressure test for thermoplastic bodied valves .................. 40

Annex DD (normative) Torque ............................................................................................ 42

Annex EE (normative) 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) .............................................................................................................................. 46

Bibliography ....................................................................................................................... 48

Figure BB.1 – Transient pressure measurement test rig schematic diagram ......................... 38

Figure DD.1 – Arrangements for carrying out the torque test ................................................ 42

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SIST EN IEC 60730-2-8:2021
IEC 60730-2-8:2018 © IEC 2018 – 3 –
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 ................................... 46

Table 1 – Required information and methods of providing information .................................. 16

Table 101 – Nominal size and thread size of end connections .............................................. 16

Table 102 – Torque test requirement for metal valves with internal threaded end-

connections ........................................................................................................................ 25

Table 103 – Torque test requirement for metal valves with external threaded end-

connections ........................................................................................................................ 26

Table 104 – Maximum winding temperature (for test of blocked output conditions and

valves declared under Table 1, item 113) ............................................................................ 28

Table CC.1 – Test requirements for valves intended for uses other than the control of

water for tap and shower outlets ......................................................................................... 40

Table CC.2 – Test requirements for valves intended for the control of water for tap and

shower outlets .................................................................................................................... 41

Table DD.1 – Required torque for test ................................................................................. 43

Table DD.2 – Tightening torque in newton metres (Nm) for bolts and screws for

adaptors ............................................................................................................................. 44

---------------------- Page: 9 ----------------------
SIST EN IEC 60730-2-8:2021
– 4 – IEC 60730-2-8:2018 © IEC 2018
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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

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

International Standard IEC 60730-2-8 has been prepared by IEC technical committee 72:

Automatic electrical controls.
This third edition cancels and replaces the second edition published in 2000,

Amendment 1:2002 and its Amendment 2:2015. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

• alignment of the text with IEC 60730-1 fifth edition (2013) including Amendment 1:2015;

• introduction of specific requirements for thermoplastic bodied valves for the control of

water for tap and shower outlets (18.101.4.3 and Annex CC);
• removal of Subclause 18.102 Wetted material specifications.
---------------------- Page: 10 ----------------------
SIST EN IEC 60730-2-8:2021
IEC 60730-2-8:2018 © IEC 2018 – 5 –

Future standards in this series will carry the new general title as cited above. Titles of existing

standards in this series will be updated at the time of the next edition.
The text of this International Standard is based on the following documents:
CDV Report on voting
72/1077/CDV 72/1120/RVC

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This part 2-8 is intended to be used in conjunction with IEC 60730-1. It was established on

the basis of the fifth edition (2013) including Amendment 1 (2015) of that publication.

This part 2-8 supplements or modifies the corresponding clauses in IEC 60730-1 so as to

convert that publication into the IEC standard: Safety 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 "in some countries" notes regarding differing national practices are contained in the following elements:

– Table 1, footnotes ab and ac
– Table 13, footnote aa
– 1.1.4
– 16.2.1
– 18.101.3
– 27.2.3.1
– 27.101
– Table DD. 1, footnote a
– Table DD.2, footnote a
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: in bold type

2) Subclauses, notes, tables or figures which are additional to those in part 1 are numbered

starting from 101, additional annexes are lettered AA, BB, etc.
---------------------- Page: 11 ----------------------
SIST EN IEC 60730-2-8:2021
– 6 – IEC 60730-2-8:2018 © IEC 2018

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
---------------------- Page: 12 ----------------------
SIST EN IEC 60730-2-8:2021
IEC 60730-2-8:2018 © IEC 2018 – 7 –
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-8: Particular requirements for electrically operated water valves,
including mechanical requirements
1 Scope and normative references
This clause of Part 1 is applicable except as follows:
1.1 Scope
Replacement:

This part of IEC 60730 applies to electrically operated water valves for use in, on or in

association with equipment for household and similar use, including heating, air-conditioning

and similar applications. The equipment can use electricity, gas, oil, solid fuel, solar thermal

energy, etc., or a combination thereof.

NOTE 1 Throughout this document, the word "equipment" means "appliances and equipment."

This document is applicable to electrically operated water valves for building automation

within the scope of ISO 16484.

This document also applies to automatic electrically operated water valves for equipment that

can be used by the public, such as equipment intended to be used in shops, offices, hospitals,

farms and commercial and industrial applications.

EXAMPLE 1: Electrically operated water valves for commercial catering, heating and air-conditioning equipment.

This document does not apply to electrically operated water valves intended exclusively for

industrial process applications unless explicitly mentioned in the relevant equipment standard.

This document applies to electrically operated water valves powered by primary or secondary

batteries, requirements for which are contained within the standard, including Annex V.

This document does not cover the prevention of contamination of drinking water as a result of

contact with materials.

1.1.1 This document applies to the inherent safety, to the operating values, operating times

and operating sequences where such are associated with equipment safety, and to the testing

of automatic electrical control devices used in, on or in association with, household and

similar 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 is also applicable to electrically operated water valves for appliances within

the scope of the IEC 60335 series of standards.
This document does not 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;

---------------------- Page: 13 ----------------------
SIST EN IEC 60730-2-8:2021
– 8 – IEC 60730-2-8:2018 © IEC 2018
– food dispensers;
– detergent dispensers;
– steam valves;

– electrically operated water valves designed exclusively for industrial applications.

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".

1.1.2 This document applies to electrically operated water valves, 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.

1.1.3 This document also applies to actuators and to valve bodies which are designed to be

fitted to each other.

1.1.4 This document applies to individual valves, valves utilized as part of a system and

valves mechanically integral with multi-functional controls having non-electrical outputs.

NOTE Attention is drawn to the fact that, in many countries, additional test requirements and by-laws have been

established by the water authorities or companies.

1.1.5 This document applies to AC or DC powered electrically operated water valves with a

rated voltage not exceeding 690 V AC or 600 V DC.

1.1.6 This document does not take into account the response value of an automatic action

of a valve, if such a response value is dependent upon the method of mounting the valve 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 shall apply.

1.1.7 This document applies also to electrically operated water valves incorporating

electronic devices, requirements for which are contained in Annex H.

1.1.8 This document applies also to electrically operated water valves using NTC or PTC

thermistors, requirements for which are contained in Annex J.

1.1.9 This document applies to the electrical and functional safety of electrically operated

water valves capable of receiving and responding to communications signals, including

signals for power billing rate and demand response.

The signals can be transmitted to or received from external units being part of the valve

(wired), or to and from external units which are not part of the valve (wireless) under test.

1.1.10 This document does not 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.
---------------------- Page: 14 ----------------------
SIST EN IEC 60730-2-8:2021
IEC 60730-2-8:2018 © IEC 2018 – 9 –
1.2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:

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, Pipe threads where pressure-tight joints are not made on the threads – Part 1:

Dimensions, tolerances and designation
ISO 630, Structural steels – Plates, wide flats, bars sections and profiles

ISO 1179-1, 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, Pipework – Stainless steel fittings threaded in accordance with ISO 7-1

2 Terms and definitions
This clause of Part 1 is applicable, except as follows:
2.2 Definitions of types of control according to purpose
2.2.17
electrically operated valve
Addition:

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:
2.2.17.101
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
2.2.17.102
water valve
valve intended to be connected to a water supply and to control water flow
2.2.17.103
heating-water valve
valve intended to control the water circulation in heating systems
2.2.17.104
actuator

electrically operated mechanism or prime mover used to effect the opening or closing action

of a valve
ISO 630 has been withdrawn.
---------------------- Page: 15 ----------------------
SIST EN IEC 60730-2-8:2021
– 10 – IEC 60730-2-8:2018 © IEC 2018

Note 1 to entry: An actuator may be integral with the valve, fixed to the valve body assembly or delivered as a

separate component.
Note 2 to entry: An actuator may also include the valve and closure member.
2.2.17.105
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 may be part of the actuator.

2.2.17.106
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.
2.2.17.107
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 may 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.
2.2.17.108
...

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