SIST EN ISO 18984:2025

Ball valves for thermoplastics piping systems for hot and cold water installations under pressure - Types, dimensions and requirements (ISO 18984:2025)

This document is applicable to two-way or multi-way ball valves manufactured with all types of polypropylene (PP) and chlorinated polyvinylchloride (PVC-C) thermoplastic materials to be used for the transport of pressurized water whether or not intended for human consumption (domestic systems) for applications in buildings and utility branches.
NOTE 1        The two-way valve is generally used for sectioning and control of flows, and the multi-way valve is used to divert or mix the flows. For information on their functionality, see ISO 16135:2006, Annex B.
NOTE 2        The reader of this document is informed that the water intended for human consumption is subjected to national, regional or local regulatory provisions as applicable.
The application classes are indicated in ISO 15874 and ISO 15877 series.
This document specifies valve characteristics as follows:
—     dimensions for assembly in the relevant pipelines,
—     physical and mechanical requirements.
Other materials can fit the scope of this document if the application classes are specified in a material related specific standard.
Ball valves specified in this document are not intended to be used in conjunction with pipes made by metallic material and copper alloys.

Kugelventile für thermoplastische Heiß- und Kaltwasserdruckrohrleitungen - Arten, Abmessungen und Anforderungen (ISO 18984:2025)

Dieses Dokument ist für aus allen Arten von thermoplastischen Werkstoffen aus Polypropylen (PP) und chloriertem Polyvinylchlorid (PVC-C) hergestellte Zwei-Wege- oder Mehrwege-Kugelventile anwendbar, die für die Beförderung von druckbeaufschlagtem Wasser, unabhängig davon ob für den menschlichen Gebrauch (Haushaltssysteme) vorgesehen oder nicht, für Anwendungen in Gebäuden und Versorgungsrohrabzweigungen zu verwenden sind.
ANMERKUNG 1   Das Zwei-Wege Ventil wird im Allgemeinen zum Absperren und Regeln von Strömen verwendet, und das Mehrwege-Ventil zum Verzweigen oder Mischen der Ströme. Zu Angaben zu ihrer Funktionsweise siehe ISO 16135:2006, Anhang B.
ANMERKUNG 2   Der Leser dieses Dokuments wird darauf aufmerksam gemacht, dass Wasser für den menschlichen Gebrauch nationalen, regionalen bzw. örtlichen regulatorischen Bestimmungen unterliegt.
Die Anwendungsklassen sind in den Normenreihen ISO 15874 und ISO 15877 angegeben.
In diesem Dokument sind die folgenden Eigenschaften von Ventilen festgelegt:
   Maße für den Einbau in maßgebliche Rohrleitungen;
   physikalische und mechanische Anforderungen.
Andere Werkstoffe können in den Anwendungsbereich dieses Dokuments fallen, wenn die Anwendungsklassen in einer werkstoffbezogenen spezifischen Norm festgelegt sind.
In diesem Dokument festgelegte Kugelventile sind nicht für die Verwendung in Verbindung mit Rohren aus metallischem Werkstoff und Kupferlegierungen vorgesehen.

Robinets à tournant sphérique pour systèmes de canalisations en matières thermoplastiques pour installations d'eau chaude et froide sous pression - Types, dimensions et exigences (ISO 18984:2025)

Le présent document s’applique aux robinets à tournant sphérique à deux voies ou multivoies fabriqués avec tout type de matériaux thermoplastiques polypropylène (PP) et polychlorure de vinyle chloré (PVC-C) et destinés à être utilisés pour le transport d’eau sous pression, qu’elle soit ou non destinée à la consommation humaine (systèmes domestiques) pour des applications dans les bâtiments et les branchements de service publique.
NOTE 1         Le robinet à deux voies est généralement utilisé pour le sectionnement et le contrôle des écoulements et le robinet multivoies est utilisé pour dévier ou mélanger les écoulements. Pour des informations sur leurs fonctionnalités, voir l'ISO 16135:2006, Annexe B.
NOTE 2        Le lecteur du présent document est informé du fait que l’eau destiné à la consommation humaine est soumise aux dispositions réglementaires nationales, régionales et locales, le cas échéant.
Les classes d'application sont indiquées dans les séries ISO 15874 et ISO 15877.
Le présent document définit les caractéristiques des robinets comme suit:
—     les dimensions pour le montage des conduits pertinents;
—     les exigences physiques et mécaniques.
D’autres matériaux peuvent entrer dans le domaine d’application du présent document si les classes d’application sont spécifiées dans une norme spécifique relative au matériau.
Les robinets à tournant sphérique spécifiés dans le présent document ne sont pas destinés à être utilisés conjointement aux tubes réalisés à partir d’un matériau métallique ou des alliages de cuivre.

Kroglični ventili za cevne sisteme iz termoplastov za napeljave tople in hladne vode pod tlakom - Vrste, mere in zahteve (ISO 18984:2025)

Ta dokument se uporablja za dvosmerne ali večsmerne kroglične ventile, izdelane iz vseh vrst termoplastičnih materialov na osnovi polipropilena (PP) in kloriranega polivinilklorida (PVC-C), ki se uporabljajo za prenos vode pod tlakom, ne glede na to, ali je pitna (gospodinjstvo) ali ne, za uporabo v stavbah in komunalnem omrežju. OPOMBA 1:         Dvosmerni ventil se običajno uporablja za razdelitev in regulacijo pretokov, večsmerni ventil pa za preusmeritev ali mešanje pretokov. Za informacije o njihovem delovanju glej standard ISO 16135:2006, dodatek B. OPOMBA 2:         Uporabnik tega dokumenta mora biti seznanjen s tem, da za pitno vodo veljajo ustrezne nacionalne, regionalne ali lokalne regulativne določbe. Razredi uporabe so navedeni v skupinah standardov ISO 15874 in ISO 15877. Ta dokument določa naslednje lastnosti ventilov: –    mere za montažo v ustrezne cevovode, –    fizikalne in mehanske zahteve. Drugi materiali lahko ustrezajo področju uporabe tega dokumenta, če so razredi uporabe določeni v posebnem standardu za material. Kroglični ventili, določeni v tem dokumentu, niso namenjeni uporabi v povezavi s cevmi iz kovinskih materialov in bakrovih zlitin.

General Information

• Status: Published
• Public Enquiry End Date: 23-Apr-2024
• Publication Date: 01-Oct-2025
• ICS: 23.060.20 - Ball and plug valves
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-Sep-2025
• Due Date: 04-Dec-2025
• Completion Date: 02-Oct-2025
• Ref Project: EN ISO 18984:2025 - Ball valves for thermoplastics piping systems for hot and cold water installations under pressure - Types, dimensions and requirements (ISO 18984:2025)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2025
Kroglični ventili za cevne sisteme iz termoplastov za napeljave tople in hladne
vode pod tlakom - Vrste, mere in zahteve (ISO 18984:2025)
Ball valves for thermoplastics piping systems for hot and cold water installations under
pressure - Types, dimensions and requirements (ISO 18984:2025)
Kugelventile für thermoplastische Heiß- und Kaltwasserdruckrohrleitungen - Arten,
Abmessungen und Anforderungen (ISO 18984:2025)
Robinets à tournant sphérique pour systèmes de canalisations en matières
thermoplastiques pour installations d'eau chaude et froide sous pression - Types,
dimensions et exigences (ISO 18984:2025)
Ta slovenski standard je istoveten z: EN ISO 18984:2025
ICS:
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 18984
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2025
EUROPÄISCHE NORM
ICS 23.060.20
English Version
Ball valves for thermoplastics piping systems for hot and
cold water installations under pressure - Types,
dimensions and requirements (ISO 18984:2025)
Robinets à tournant sphérique pour systèmes de Kugelventile für thermoplastische Heiß- und
canalisations en matières thermoplastiques pour Kaltwasserdruckrohrleitungen - Arten, Abmessungen
installations d'eau chaude et froide sous pression - und Anforderungen (ISO 18984:2025)
Types, dimensions et exigences (ISO 18984:2025)
This European Standard was approved by CEN on 3 August 2025.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18984:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 18984:2025) has been prepared by Technical Committee ISO/TC 138 "Plastics
pipes, fittings and valves for the transport of fluids " in collaboration with Technical Committee CEN/TC
155 “Plastics piping systems and ducting systems” the secretariat of which is held by NEN.
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 February 2026, and conflicting national standards
shall be withdrawn at the latest by February 2026.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 18984:2025 has been approved by CEN as EN ISO 18984:2025 without any modification.

International
Standard
ISO 18984
First edition
Ball valves for thermoplastics
2025-07
piping systems for hot and
cold water installations under
pressure — Types, dimensions and
requirements
Robinets à tournant sphérique pour systèmes de canalisations
en matières thermoplastiques pour installations d'eau chaude et
froide sous pression — Types, dimensions et exigences
Reference number
ISO 18984:2025(en) © ISO 2025
ISO 18984:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 18984:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 5
4.1 Design .5
4.1.1 Design operating conditions .5
4.1.2 Function .5
4.1.3 Design characteristics .5
4.1.4 Types of valve ends .5
4.2 Materials .6
4.2.1 General .6
4.2.2 Body and shell material .6
4.2.3 Valve end materials .6
4.2.4 Materials for internal components and functional components of the valve .6
4.2.5 Metal parts .7
4.2.6 Sealing materials .7
4.2.7 Greases and lubricants .7
4.2.8 Adhesives .7
4.2.9 Assembly.7
5 Application classes for hot water . 7
5.1 General .7
5.2 Design pressure for the application class .7
6 Dimensions . 8
6.1 Face-to-face dimensions .8
6.2 Joint dimensions of the valve end connection (DN) .8
7 Operation . 8
8 Functional characteristics and requirements . 8
8.1 General .8
8.2 Flow characteristics .8
8.3 Endurance test .8
8.3.1 Principle .8
8.3.2 Test installation . .9
8.3.3 Test . . .9
8.3.4 Acceptance criteria .9
8.4 Operating torque test .10
9 Other requirements . .10
9.1 Control and traceability of the body and bonnet/cover .10
9.2 Permanent jointing .10
9.3 Wear .10
9.4 Operating instructions .10
10 Marking, documentation, storage and transportation.11
10.1 Marking and technical information .11
10.2 Preparation for storage and transportation .11
Annex A (normative) PP ball valve .13
Annex B (normative) PVC-C ball valve .16
Annex C (informative) Determination of nominal flow coefficient, K .18
v
Bibliography . 19

iii
ISO 18984:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO 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, ISO 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
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 7, Valves and auxiliary equipment of plastics materials, in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 155, Plastics piping
systems and ducting systems, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO 18984:2025(en)
Introduction
Ball valves made by thermoplastic materials such as mineral-filled thermoplastic polymer, fibre-reinforced
thermoplastics, plasticized thermoplastics, blends and alloys can have specific considerations with regards
to prediction of long term strength. These considerations have to be taken into account in the corresponding
product standards.
v
International Standard ISO 18984:2025(en)
Ball valves for thermoplastics piping systems for hot and cold
water installations under pressure — Types, dimensions and
requirements
1 Scope
This document is applicable to two-way or multi-way ball valves manufactured with all types of
polypropylene (PP) and chlorinated polyvinylchloride (PVC-C) thermoplastic materials to be used for the
transport of pressurized water whether or not intended for human consumption (domestic systems) for
applications in buildings and utility branches.
NOTE 1 The two-way valve is generally used for sectioning and control of flows, and the multi-way valve is used to
divert or mix the flows. For information on their functionality, see ISO 16135:2006, Annex B.
NOTE 2 The reader of this document is informed that the water intended for human consumption is subjected to
national, regional or local regulatory provisions as applicable.
The application classes are indicated in ISO 15874 and ISO 15877 series.
This document specifies valve characteristics as follows:
— dimensions for assembly in the relevant pipelines,
— physical and mechanical requirements.
Other materials can fit the scope of this document if the application classes are specified in a material related
specific standard.
Ball valves specified in this document are not intended to be used in conjunction with pipes made by metallic
material and copper alloys.
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.
ISO 5211, Industrial valves — Part-turn actuator attachments
ISO 8233, Thermoplastics valves — Torque — Test method
ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of
thermoplastics materials in pipe form by extrapolation
ISO 9393-2:2005, Thermoplastics valves for industrial applications — Pressure test methods and requirements
— Part 2: Test conditions and basic requirements
ISO 9624, Thermoplastics piping systems for fluids under pressure — Flange adapters and loose backing flanges
— Mating dimensions
ISO 15874-1, Plastics piping systems for hot and cold water installations — Polypropylene (PP) — Part 1: General
ISO 15874-2, Plastics piping systems for hot and cold water installations — Polypropylene (PP) — Part 2: Pipes
ISO 15874-3, Plastics piping systems for hot and cold water installations — Polypropylene (PP) — Part 3: Fittings

ISO 18984:2025(en)
ISO 15874-5, Plastics piping systems for hot and cold water installations — Polypropylene (PP) — Part 5: Fitness
for purpose of the system
ISO 15874-5:2013/Amd 1:2018, Plastics piping systems for hot and cold water installations — Polypropylene
(PP) — Part 5: Fitness for purpose of the system
ISO 15877-2, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl chloride)
(PVC-C) — Part 2: Pipes
ISO 15877-3, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl chloride)
(PVC-C) — Part 3: Fittings
ISO 15877-3/Amd 1:2010, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl
chloride) (PVC-C) — Part 3: Fittings
ISO 15877-3/Amd 2:2021, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl
chloride) (PVC-C) — Part 3: Fittings
ISO 15877-5, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl chloride)
(PVC-C) — Part 5: Fitness for purpose of the system
ISO 15877-5/Amd 1:2010, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl
chloride) (PVC-C) — Part 5: Fitness for purpose of the system
ISO 15877-5/Amd 2:2020, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl
chloride) (PVC-C) — Part 5: Fitness for purpose of the system
ISO 16135:2006, Industrial valves — Ball valves of thermoplastics materials
EN 558, Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe
systems — PN and Class designated valves
EN 681-1, Elastomeric seals — Material requirements for pipe joint seals used in water and drainage applications
- Part 1: Vulcanized rubber
EN 681-2, Elastomeric seals — Material requirements for pipe joint seals used in water and drainage applications
- Part 2: Thermoplastic elastomers
EN 736-1, Valves — Terminology — Part 1: Definition of types of valves
EN 736-2, Valves — Terminology — Part 2: Definition of components of valves
EN 736-3, Valves — Terminology — Part 3: Definition of terms
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated
— Part 1: Steel flanges
EN 1267, Industrial valves —Test of flow resistance using water as test fluid
EN 12570:2000, Industrial valves — Method for sizing the operating element
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2, EN 736-3 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/

ISO 18984:2025(en)
3.1
DN
nominal size
alphanumeric designation of size for components of a pipework system, which is used for reference purposes,
comprising the letters DN followed by a dimensionless whole number which is indirectly related to the
physical size, in millimetres, of the bore or outside diameter of the end connections
[SOURCE: ISO 6708:1995, 2.1]
3.2
shell
pressure-containing envelope of the valve
Note 1 to entry: It normally comprises the body and when included in the design a bonnet or cover and the body
bonnet or body cover joint excluding sealing parts.
[SOURCE: EN 736-2:2016, 3.1]
3.3
body
main component of the valve which provides the fluid-flow passageways and the body ends
[SOURCE: EN 736-2:2016, 3.1.1]
3.4
trim
functional components of a valve excluding the shell components which are in contact with the fluid inside
the valve
[SOURCE: EN 736-2:2016, 3.2 — modified without Note 1 to entry]
3.5
bonnet
component of the shell which closes an opening in the body and contains an opening for the passage of the
operating mechanism
[SOURCE: EN 736-2:2016, 3.1.2]
3.6
body end
part of the body provided with the means of connection to the piping component (excluding by-pass if fitted)
[SOURCE: EN 736-2:2016, 3.1.1.9]
3.7
complete valve
assembly of valve shell and internal components
3.8
operating torque
torque, under specified conditions, to operate the valve
Note 1 to entry: it is expressed in newton metres (Nm).
Note 2 to entry: Adapted from EN 12570:2000, Clause 4.
3.9
max operating torque
maximum torque, under specified conditions, to seat or unseat the obturator or to overcome temporary
intermediate dynamic conditions
Note 1 to entry: It is expressed in newton metres (Nm).

ISO 18984:2025(en)
Note 2 to entry: Adapted from EN 12570:2000, Clause 4.
3.10
cold water
water with temperature up to 25 °C
Note 1 to entry: during the design phase a temperature of 20 °C is considered
3.11
design pressure
p
D
highest pressure related to the circumstances for which the system has been designed and is intended to
be used.
[1]
Note 1 to entry: The design pressure ()p is equal to the maximum design pressure (MDP), as specified in EN 806-1.
D
3.12
flow coefficient
K
v
water flow in cubic metres per hour (m /h) at a specified condition
3.13
manual force
F
operating manual force to size the manual operating element, expressed in newtons (N)
Note 1 to entry: Adapted from EN 12570:2000, Clause 4.
3.14
maximum manual force
F
s
maximum manual force to size the manual operating element, expressed in newtons (N)
Note 1 to entry: Adapted from EN 12570:2000, Clause 4.
3.15
nominal
...