SIST EN 14451:2020

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
...