EN 1488:2021

Building valves - Expansion groups - Tests and requirements

This document specifies, dimensions, materials and performance requirements (including methods of test) for expansion groups, of nominal sizes from DN 15 to DN 25, having working pressures  from 0,1 MPa (1 bar) to 1,0 MPa (10 bar).
Expansion groups are fitted to the cold potable water supply only for expansion purposes, e.g. of storage water heaters, having a maximum distribution temperature of 95 °C.
Expansion groups limit pressure in the water heater to which they are fitted, that is produced by thermal expansion of the water, prevent the backflow of water into the supply pipe and prevent the discharged water to get into contact with the water in the water heater.
Expansion groups do not control temperature and alone do not constitute the protection required for storage water heaters.
NOTE   The use of the device specified in this document does not override the need to use controls (e.g. thermostats and thermal cut-outs) which act directly on the power sources of water heaters (for more information see Annex A).

Gebäudearmaturen - Sicherheitsgruppen für Expansionswasser - Prüfungen und Anforderungen

Dieses Dokument legt Maße, Werkstoffe und Leistungsanforderungen (einschließlich Prüfverfahren) für Sicherheitsgruppen für Expansionswasser mit Nennweiten DN 15 bis DN 25 und Betriebsdrücken  von 0,1 MPa (1 bar) bis 1,0 MPa (10 bar) fest.
Sicherheitsgruppen für Expansionswasser werden ausschließlich zu Expansionszwecken an die Kaltwasser¬versorgung angeschlossen, z. B. an Speicher-Warmwasserbereiter mit einer höchsten Verteilungstemperatur von 95 °C.
Sicherheitsgruppen für Expansionswasser begrenzen den durch die thermische Ausdehnung des Wassers entstehenden Druck im Warmwasserbereiter, an den sie angeschlossen sind, verhindern den Rückfluss von Wasser in die Versorgungsleitung und verhindern, dass abgeleitetes Wasser in Kontakt mit dem Wasser im Warmwasserbereiter kommt.
Sicherheitsgruppen für Expansionswasser steuern weder die Temperatur noch stellen Sie allein den für Speicher-Warmwasserbereiter erforderlichen Schutz bereit.
ANMERKUNG Durch die Verwendung des in diesem Dokument beschriebenen Gerätes wird die Notwendigkeit der Verwendung von Steuereinrichtungen (z. B. Thermostate und Thermoauslöser), die direkt an den Leistungsquellen von Warmwasserbereitern zum Einsatz kommen, nicht aufgehoben (weitere Informationen siehe Anhang A).

Robinetterie de bâtiment - Groupes d'expansion - Essais et exigences

Le présent document spécifie les dimensions, les matériaux et les exigences de performance (y compris les méthodes d’essai) pour les groupes d’expansion de dimensions nominales allant de DN 15 à DN 25 et dont la pression de service 1 va de 0,1 MPa (1 bar) à 1,0 MPa (10 bar).
Les groupes d’expansion sont raccordés à l’alimentation en eau potable froide uniquement pour des besoins d’expansion, par exemple de chauffe-eau à accumulation ayant une température maximale de distribution de 95 °C.
Les groupes d’expansion permettent de limiter l’augmentation de la pression du fluide contenu dans le chauffe-eau, qui est générée par la dilatation de l’eau, ils empêchent le retour de l’eau dans la canalisation d’alimentation et tout contact entre l’eau du réseau d’évacuation et l’eau du chauffe-eau.
Les groupes d’expansion ne contrôlent pas la température et n’assurent pas à eux seuls la protection nécessaire des chauffe-eau à accumulation.
NOTE L’usage du dispositif spécifié dans le présent document ne dispense pas de la nécessité d’utiliser des commandes (par exemple, thermostats et dispositifs de coupure) qui agissent directement sur les sources d’énergie des chauffe-eau (pour plus d’informations, voir l’Annexe A).

Ventili v stavbah - Ekspanzijski bloki - Preskusi in zahteve

General Information

• Status: Published
• Publication Date: 11-May-2021
• Withdrawal Date: 29-Nov-2021
• ICS: 91.140.60 - Water supply systems
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 14 - Valves and fitting for buildings and devices to prevent pollution by backflow
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 12-May-2021
• Due Date: 04-Dec-2021
• Completion Date: 12-May-2021
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 98/83/EC - Quality of water intended for human consumption
• Ref Project: SIST EN 1488:2021 - Building valves - Expansion groups - Tests and requirements

Relations

• Replaces: EN 1488:2000 - Building valves - Expansion groups - Tests and requirements
• Effective Date: 19-May-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN 1488:2000
Ventili v stavbah - Ekspanzijski bloki - Preskusi in zahteve
Building valves - Expansion groups - Tests and requirements
Gebäudearmaturen - Sicherheitsgruppen für Expansionswasser - Prüfungen und
Anforderungen
Robinetterie de bâtiment - Groupes d'expansion - Essais et exigences
Ta slovenski standard je istoveten z: EN 1488:2021
ICS:
23.060.01 Ventili na splošno Valves in general
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1488
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 91.140.60 Supersedes EN 1488:2000
English Version
Building valves - Expansion groups - Tests and
requirements
Robinetterie de bâtiment - Groupes d'expansion - Gebäudearmaturen - Sicherheitsgruppen für
Essais et exigences Expansionswasser - Prüfungen und Anforderungen
This European Standard was approved by CEN on 19 March 2021.

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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1488:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Materials and surface finishes . 9
4.1 General . 9
4.2 Materials . 10
4.3 Detection of residual stress . 10
4.3.1 General . 10
4.3.2 Test . 10
4.3.3 Test method (Procedure) . 10
4.3.4 Requirements . 11
4.4 Corrosion resistance test . 11
4.4.1 General . 11
4.4.2 Test method . 11
4.4.3 Requirements . 11
4.5 Coating adherence test . 12
4.5.1 General . 12
4.5.2 Test method . 12
4.5.3 Requirements . 12
4.6 Compatibility with the products used for shock disinfection of the networks. 12
4.6.1 General . 12
4.6.2 Test method . 12
4.6.3 Requirements . 13
5 Design and dimensional requirements . 13
5.1 General guidance . 13
5.2 Dimensional characteristics. 14
5.3 Test port and pressure measuring port . 14
5.4 Expansion valve outlet connection to air break to drain. 14
5.5 Expansion valve discharge connection to drain device . 14
5.6 Connections . 14
5.7 Replacing of the expansion valve . 14
5.8 Check valve . 15
6 Apparatus . 15
6.1 General . 15
6.2 Tolerances of parameters and accuracy of measure instruments . 15
6.2.1 Tolerances on set parameters . 15
6.2.2 Accuracy of measuring instruments . 15
6.2.3 Test media . 15
7 Hydraulic tests and requirements . 15
7.1 Flow rate test . 15
7.1.1 Procedure. 15
7.1.2 Requirement . 15
7.2 Tightness test . 16
7.2.1 General . 16
7.2.2 Tightness test for the isolating valve at a pressure of 1,6 MPa (16 bar) . 16
7.2.3 Expansion group tightness test . 16
8 Mechanical tests and requirements . 16
8.1 Mechanical strength . 16
8.1.1 Pressure test of the body of the expansion group . 16
8.1.2 Bending moment test . 17
8.2 Mechanical strength of the easing gear of the expansion valve . 18
8.2.1 Procedure . 18
8.2.2 Requirement . 18
8.3 Torsional strength of the expansion group’s body . 18
8.3.1 General . 18
8.3.2 Procedure . 18
8.3.3 Requirement . 19
8.4 Torque test of the captive rotating nuts/tail pieces . 19
8.4.1 General . 19
8.4.2 Procedure . 19
8.4.3 Requirement . 19
9 Tests and requirements of the components of the expansion group . 20
9.1 Isolating valve . 20
9.1.1 General . 20
9.1.2 General requirements . 20
9.1.3 Test of manual operation . 20
9.1.4 Endurance test . 20
9.2 Tightness between check valve and group's body . 21
9.2.1 General . 21
9.2.2 Verification of the leak tightness between the group’s body and the check valve at
low pressure . 21
9.2.3 Verification of the leak tightness between the group’s body and the check valve
under high pressure . 21
9.3 Expansion valve . 21
9.3.1 Pressures .
...