EN 1491:2022

Building valves - Expansion valves - Tests and requirements

This document specifies dimensions, materials and performance requirements (including methods of test) for expansion valves, of nominal sizes from DN 15 to DN 32, having working pressures ) from 0,1 MPa (l bar) to 1,0 MPa (10 bar).
Expansion valves are intended for fitting to the cold potable water supply of storage water heaters, having a maximum distribution temperature of 95 °C, for all energy sources.
Expansion valves do not control the temperature and alone do not constitute the protection required for storage water heaters. Expansion valves limit pressure, in the water heaters to what they are fitted, that is produced by thermal expansion of the water.
NOTE   The use of the device specified in this document does not override the need to use controls (e.g. thermostats and cut-outs) which act directly on the power sources of water heaters (for more information see Annex A).

Gebäudearmaturen - Sicherheitsventile für Expansionswasser - Prüfungen und Anforderungen

Dieses Dokument legt Abmessungen, Werkstoffe und Leistungsanforderungen (einschließlich Prüfverfahren) für Sicherheitsventile für Expansionswasser mit einer Nennweite von DN 15 bis DN 32 und Betriebsdrücken  von 0,1 MPa (1 bar) bis 1,0 MPa (10 bar) fest.
Sicherheitsventile für Expansionswasser sind für den Anschluss an die kalte Trinkwasserversorgung von Speicherwassererwärmern mit einer maximalen Gebrauchstemperatur von 95 °C, unabhängig von den verwendeten Energiequellen, bestimmt.
Das Expansionsventil für Expansionswasser überwacht nicht die Temperaturen und stellt auch nicht die einzige für einen Speicherwassererwärmer erforderliche Sicherheit dar. Das Sicherheitsventil für Expansionswasser begrenzt den durch die Wärmeausdehnung des Wassers verursachten Druckanstieg im Wassererwärmer, in den es eingebaut ist.
ANMERKUNG   Durch die Verwendung des in diesem Dokument beschriebenen Gerätes wird die Notwendigkeit zu Verwendung von Steuereinrichtungen (z. B. Thermostate und Auslöser), die direkt an den Leistungsquellen von Warmwasserbereitern zum Einsatz kommen, nicht aufgehoben (für weitere Informationen siehe Anhang A).

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

Le présent document spécifie les dimensions, les matériaux et les exigences de performance (y compris les méthodes d´essai) auxquels doivent satisfaire les soupapes d’expansion de diamètre nominal allant de DN 15 à DN 32, dont les pressions de service ) sont comprises entre 0,1 MPa (1 bar) et 1,0 MPa (10 bar).
Les soupapes d’expansion sont destinées à être montées au niveau de l’alimentation en eau potable froide des chauffe-eau à accumulation, dont la température de distribution ne dépasse pas 95 °C, quelles que soient les sources d’énergie utilisées.
Les soupapes d'expansion ne contrôlent pas la température et ne constituent pas, à elles seules, la protection nécessaire aux chauffe-eau à accumulation. Les soupapes d’expansion limitent la pression dans les chauffe-eau où elles sont montées, occasionnée par la dilatation thermique de l’eau.
NOTE   L'utilisation du dispositif spécifié dans le présent document ne doit pas prévaloir sur la nécessité d'utiliser des commandes (telles que les 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 ventili - Preskusi in zahteve

Ta dokument določa mere, materiale in tehnične zahteve (vključno s preskusnimi metodami) za ekspanzijske ventile nazivnih velikosti od DN 15 do DN 32 z delovnimi tlaki od 0,1 MPa (1 bar) do 1,0 MPa (10 barov).
Ekspanzijski ventili so namenjeni vgradnji na dovod hladne pitne vode akumulacijskih grelnikov vode z najvišjo distribucijsko temperaturo 95 °C za vse vire energije.
Ekspanzijski ventili ne regulirajo temperature in sami po sebi ne predstavljajo zaščite, zahtevane za akumulacijske grelnike vode. Ekspanzijski ventili omejujejo tlak, ki nastane zaradi toplotnega raztezanja vode v grelnikih vode, v katere so vgrajeni.
OPOMBA:   Uporaba naprave, navedene v tem dokumentu, ne izključuje zahteve za uporabo krmilnikov (npr. termostatov in izklopnih stikal), ki delujejo neposredno na vire napajanja grelnikov vode (za več informacij glej dodatek A).

General Information

• Status: Published
• Publication Date: 19-Jul-2022
• Withdrawal Date: 30-Jan-2023
• 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: 20-Jul-2022
• Due Date: 04-Dec-2021
• Completion Date: 20-Jul-2022
• Directive: 98/83/EC - Quality of water intended for human consumption
• Ref Project: SIST EN 1491:2022 - Building valves - Expansion valves - Tests and requirements

Relations

• Replaces: EN 1491:2000 - Building valves - Expansion valves - Tests and requirements
• Effective Date: 26-Jun-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN 1491:2000
Ventili v stavbah - Ekspanzijski ventili - Preskusi in zahteve
Building valves - Expansion valves - Tests and requirements
Gebäudearmaturen - Sicherheitsventile für Expansionswasser - Prüfungen und
Anforderungen
Robinetterie de bâtiment - Soupapes d'expansion - Essais et exigences
Ta slovenski standard je istoveten z: EN 1491:2022
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 1491
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2022
EUROPÄISCHE NORM
ICS 91.140.60 Supersedes EN 1491:2000
English Version
Building valves - Expansion valves - Tests and
requirements
Robinetterie de bâtiment - Soupapes d'expansion - Gebäudearmaturen - Sicherheitsventile für
Essais et exigences Expansionswasser - Prüfungen und Anforderungen
This European Standard was approved by CEN on 13 June 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1491:2022 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 . 8
4.1 General . 8
4.2 Materials . 9
4.3 Detection of residual stress . 9
4.3.1 General . 9
4.3.2 Test . 9
4.3.3 Test method (Procedure) . 9
4.3.4 Requirements .10
4.4 Corrosion resistance test .10
4.4.1 General .10
4.4.2 Test method .10
4.4.3 Requirements .10
4.5 Coating adherence test .10
4.5.1 General .10
4.5.2 Test method .10
4.5.3 Requirements .11
4.6 Compatibility with the products used for shock disinfection of the networks.11
4.6.1 General .11
4.6.2 Test method .11
4.6.3 Requirements .11
5 Design, dimensional and pressure requirements .12
5.1 General guidance .12
5.2 Dimensional characteristics.12
5.2.1 Nominal outlet diameter .12
5.2.2 End connections .12
5.3 Expansion valve outlet connection to air break to drain.12
5.4 Expansion valve discharge connection to drain service .12
5.5 Connections .12
5.6 Pressures .13
5.6.1 General .13
5.6.2 Nominal set pressure (P ) .13
nr
5.6.3 Water tightness pressure (P ) .13
e
5.6.4 Opening pressure (Po) .13
5.6.5 Rating pressure (P ) .13
dn
5.6.6 Clossing pressure (P ) .13
f
5.6.7 Initial opening pressure (P ) .13
dc
6 Apparatus .13
6.1 General .13
6.2 Tolerances of parameters and accuracy of measure instruments .14
6.2.1 Tolerances on set parameters . 14
6.2.2 Accuracy of measuring instruments . 14
6.2.3 Test media . 14
7 Hydraulic tests and requirements . 14
7.1 Cold water pressure tests . 14
7.1.1 General . 14
7.1.2 Water tightness pressure (P ) test . 14
e
7.1.3 Repeat tests . 15
7.2 Endurance test . 15
7.2.1 Procedure . 15
7.2.2 Requirement . 16
7.3 Easing gear (manual control device) . 16
7.3.1 Operation of the easing gear. 16
7.3.2 Easing gear endurance test . 16
8 Mechanical tests and requirements . 16
8.1 Mechanical strength . 16
8.1.1 Pressure test of the body of the expansion valve . 16
8.1.2 Bending moment test of the body of the expansion valve . 17
8.2 Mechanical strength of the easing gear . 18
8.2.1 Procedure . 18
8.2.2 Requirement . 18
8.3 Torsional strength of the expansion valve'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 Classification . 19
10 Designation . 20
11 Marking . 20
12 Technical documents and presentation at delivery . 21
Annex A (informative) Classification of water heaters according to heating method . 22
A.1 Indirect heating . 22
A.2 Classification of water heaters according to heating method . 22
A.2.1 Indirect heating . 22
...