Devices to prevent pollution by backflow of potable water - In-line anti-vacuum valves DN 10 to DN 50 inclusive - Family D, type A

This document specifies:
a)   field of application;
b)   requirements for in line anti-vacuum valves;
c)   dimensional, the physico-chemical properties and the properties of general hydraulic, mechanical and acoustic design of in-line anti-vacuum valves DN 10 to DN 50;
d)   test method and requirements for verifying these properties;
e)   marking and presentation;
f)   acoustics.
This document specifies the characteristics of in-line anti-vacuum valves DN 10 to DN 50 that are suitable for use in drinking water systems at pressures up to 1 MPa (10 bar) and temperatures up to 65 °C and for 1 h at 90 °C.

Sicherungseinrichtungen zur Verhütung von Trinkwasserverunreinigung durch Rückfließen - Rohrleitungsbelüfter DN 10 bis einschließlich DN 50 - Familie D, Typ A

Dieses Dokument legt Folgendes fest:
a)   Anwendungsbereich;
b)   Anforderungen an Rohrleitungsbelüfter;
c)   maßliche, physikalisch-chemische Eigenschaften und Eigenschaften allgemeiner hydraulischer, mechanischer und akustischer Art von Rohrleitungsbelüftern DN 10 bis DN 50;
d)   Prüfverfahren und Anforderungen, um diese Eigenschaften nachzuweisen;
e)   Kennzeichnung und Darstellung;
f)   Geräuschverhalten.
Diese Europäische Norm legt die Eigenschaften von Rohrleitungsbelüftern DN 10 bis DN 50 fest, die für den Gebrauch in Trinkwassersystemen bei Drücken bis 1 MPa (10 bar) und Temperaturen bis 65 °C und für 1 h bei 90 °C geeignet sind.

Dispositifs de protection contre la pollution de l'eau potable par retour - Soupape anti-vide en ligne DN 10 à DN 50 inclus - Famille D, type A

Le présent document spécifie :
a)   le domaine d’application ;
b)   les exigences pour les soupapes anti-vide en ligne ;
c)   les caractéristiques dimensionnelles, physico chimiques ainsi que les caractéristiques de conception hydraulique, mécanique et acoustique générales des soupapes anti-vide en ligne DN 10 à DN 50 ;
d)   la méthode d’essai et les exigences pour vérifier ces caractéristiques ;
e)   le marquage et la présentation ;
f)   les caractéristiques acoustiques.
Le présent document spécifie les caractéristiques des soupapes anti-vide en ligne DN 10 à DN 50 qui conviennent à une utilisation dans des réseaux d’eau potable à des pressions jusqu’à 1 MPa (10 bar) et des températures jusqu’à 65 °C et durant 1 h à 90 °C.

Naprave za varovanje pred onesnaženjem pitne vode zaradi povratnega toka - Ventili za preprečevanje podtlaka DN 10 do DN 50 - Družina D, tip A

General Information

Status
Published
Public Enquiry End Date
24-Mar-2019
Publication Date
10-Aug-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Jul-2020
Due Date
18-Sep-2020
Completion Date
11-Aug-2020

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SLOVENSKI STANDARD
SIST EN 14451:2020
01-september-2020
Nadomešča:
SIST EN 14451:2005
Naprave za varovanje pred onesnaženjem pitne vode zaradi povratnega toka -
Ventili za preprečevanje podtlaka DN 10 do DN 50 - Družina D, tip A

Devices to prevent pollution by backflow of potable water - In-line anti-vacuum valves DN

10 to DN 50 inclusive - Family D, type A
Sicherungseinrichtungen zur Verhütung von Trinkwasserverunreinigung durch

Rückfließen - Rohrleitungsbelüfter DN 10 bis einschließlich DN 50 - Familie D, Typ A

Dispositifs de protection contre la pollution de l'eau potable par retour - Soupape anti-

vide en ligne DN 10 à DN 50 inclus - Famille D, type A
Ta slovenski standard je istoveten z: EN 14451:2020
ICS:
13.060.20 Pitna voda Drinking water
23.060.50 Blokirni ventili Check valves
91.140.60 Sistemi za oskrbo z vodo Water supply systems
SIST EN 14451:2020 en,fr,de

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

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SIST EN 14451:2020
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SIST EN 14451:2020
EN 14451
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2020
EUROPÄISCHE NORM
ICS 13.060.20; 23.060.50 Supersedes EN 14451:2005
English Version
Devices to prevent pollution by backflow of potable water
- In-line anti-vacuum valves DN 10 to DN 50 inclusive -
Family D, type A

Dispositifs de protection contre la pollution de l'eau Sicherungseinrichtungen zur Verhütung von

potable par retour - Soupape anti-vide en ligne DN 10 à Trinkwasserverunreinigung durch Rückfließen -

DN 50 inclus - Famille D, type A Rohrleitungsbelüfter DN 10 bis einschließlich DN 50 -

Familie D, Typ A
This European Standard was approved by CEN on 24 May 2020.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14451:2020 E

worldwide for CEN national Members.
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SIST EN 14451:2020
EN 14451:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

4 Nominal size ...................................................................................................................................................... 7

5 Designation........................................................................................................................................................ 7

6 Marking and technical documents ............................................................................................................ 8

6.1 General ................................................................................................................................................................ 8

6.2 Marking ............................................................................................................................................................... 8

6.3 Technical documents ..................................................................................................................................... 8

7 Symbolization ................................................................................................................................................... 9

8 General design characteristics ................................................................................................................... 9

8.1 Design principle ............................................................................................................................................... 9

8.2 Connections .................................................................................................................................................... 10

8.3 Air inlets .......................................................................................................................................................... 10

9 Materials and surface finishes ................................................................................................................. 10

9.1 General ............................................................................................................................................................. 10

9.2 Materials .......................................................................................................................................................... 10

9.3 Corrosion resistance ................................................................................................................................... 10

10 Characteristics and tests ........................................................................................................................... 10

10.1 General ............................................................................................................................................................. 10

10.2 Test sequence ................................................................................................................................................ 11

10.3 Visual verification (Stage 1) ..................................................................................................................... 11

10.4 Tightness test (Stage 2) .............................................................................................................................. 11

10.4.1 Test equipment ............................................................................................................................................. 11

10.4.2 Test .................................................................................................................................................................... 12

10.4.3 Requirement .................................................................................................................................................. 12

10.5 Flow rate/pressure loss (Stage 3) .......................................................................................................... 13

10.5.1 Test equipment ............................................................................................................................................. 13

10.5.2 Test .................................................................................................................................................................... 14

10.5.3 Requirement .................................................................................................................................................. 14

10.6 Bending moment, mechanical strength of body and leak tightness (Stage 4) ....................... 14

10.6.1 General ............................................................................................................................................................. 14

10.6.2 Test equipment ............................................................................................................................................. 15

10.6.3 Test .................................................................................................................................................................... 15

10.6.4 Requirements ................................................................................................................................................ 16

10.7 Endurance test (Stage 6) ............................................................................................................................ 16

10.7.1 Test procedure 1 .......................................................................................................................................... 16

10.7.2 Test procedure 2 .......................................................................................................................................... 17

10.7.3 Test procedure 3 .......................................................................................................................................... 19

10.8 Vacuum test (Stage 7) ................................................................................................................................. 20

10.8.1 Vacuum test equipment ............................................................................................................................. 20

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SIST EN 14451:2020
EN 14451:2020 (E)

10.8.2 Procedure ........................................................................................................................................................ 21

10.8.3 Requirement ................................................................................................................................................... 21

11 Acoustic characteristics ............................................................................................................................. 21

11.1 General ............................................................................................................................................................. 21

11.2 Procedure ........................................................................................................................................................ 21

11.2.1 Mounting and operating conditions....................................................................................................... 21

11.2.2 Test methods .................................................................................................................................................. 21

11.3 Test criteria .................................................................................................................................................... 21

11.3.1 Expression of the results ............................................................................................................................ 21

11.3.2 Noise classification ....................................................................................................................................... 21

Annex A (informative) Sampling and test sequence ....................................................................................... 22

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SIST EN 14451:2020
EN 14451:2020 (E)
European foreword

This document (EN 14451:2020) has been prepared by Technical Committee CEN/TC 164 “Water

supply”, the secretariat of which is held by AFNOR.

This document shall be given the status of a national standard, either by publication of an identical text

or by endorsement, at the latest by December 2020, and conflicting national standards shall be

withdrawn at the latest by December 2020.

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.

This document supersedes EN 14451:2005.
In comparison with the previous edition, the following changes have been made:
a) title changed;
b) scope of application revised;
c) Clause 2 updated;
d) nominal size range in Clause 4 restricted;
e) Clause 9 adapted.

This document has been developed with reference to EN 1717 “Protection against pollution of potable

water in water installations and general requirements of devices to prevent pollution by backflow”.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this document: 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 the United

Kingdom.
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SIST EN 14451:2020
EN 14451:2020 (E)
Introduction

In respect of potential adverse effects on the quality of water intended for human consumption caused

by the product covered by this document:

a) this document provides no information as to whether the product may be used without restriction

in any of the Member States of the EU or EFTA;

b) note that, while awaiting the adoption of verifiable European criteria, existing national regulations

concerning the use and/or the characteristics of this product remain in force.
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SIST EN 14451:2020
EN 14451:2020 (E)
1 Scope

This document specifies the field of application, the dimensional, the physico-chemical, the design, the

hydraulic, the mechanical, and the acoustic characteristics of in-line anti vacuum valve family D Type A.

This document covers in-line anti vacuum valve family D Type A, intended to prevent pollution of

potable water by backflow, caused by backsiphoning only.

It is applicable to in-line anti vacuum valve in denominations DN 10 up to DN 50.

It covers in-line anti vacuum valve of PN 10 that are capable of working without modification or

adjustment:
— at any pressure, up to 1 MPa (10 bar);
— with any pressure variation, up to 1 MPa (10 bar);

— in permanent duty at a limited temperature of 65 °C and for maximum 1 h at 90 °C.

It specifies also the test methods and requirements for verifying their characteristics, the marking and

the presentation at delivery.
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.

EN 248, Sanitary tapware - General specification for electrodeposited coatings of Ni-Cr

EN 1717, Protection against pollution of potable water in water installations and general requirements of

devices to prevent pollution by backflow

EN 10226-1, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external

threads and parallel internal threads - Dimensions, tolerances and designation

EN 10226-2, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external

threads and taper internal threads - Dimensions, tolerances and designation

EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions,

tolerances and designation (ISO 228-1)

EN ISO 3822-1, Acoustics - Laboratory tests on noise emission from appliances and equipment used in

water supply installations - Part 1: Method of measurement (ISO 3822-1)

EN ISO 3822-3, Acoustics - Laboratory tests on noise emission from appliances and equipment used in

water supply installations - Part 3: Mounting and operating conditions for in-line valves and appliances

(ISO 3822-3)

EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular

cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1)

EN ISO 6509-1, Corrosion of metals and alloys - Determination of dezincification resistance of copper

alloys with zinc - Part 1: Test method (ISO 6509-1)
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SIST EN 14451:2020
EN 14451:2020 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
in-line anti-vacuum valve

mechanical device with an air inlet which is closed when water flows through it at or above

atmospheric pressure, but which opens to admit air if there is a subatmospheric pressure at the water

inlet or when the flow stops, and closes so as to be watertight when the flow of water is resumed at

normal pressure

Note 1 to entry: In case of subatmospheric pressure the obturator should admit air to the downstream

pipework as well as throttling the inlet waterway of the device.
Note 2 to entry: It ensures no protection
...

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