EN 13434:2021
(Main)Devices to prevent pollution by backflow of potable water - Mechanical disconnector, flow actuated - Family G, Type B
Devices to prevent pollution by backflow of potable water - Mechanical disconnector, flow actuated - Family G, Type B
This document specifies the dimensional, physical-chemical, design, hydraulic, mechanical and acoustic characteristics of mechanical disconnectors, flow actuated Family G, Type B.
This document is applicable to mechanical disconnectors flow actuated in nominal sizes DN 8 up to DN 250, intended to prevent the return of water having lost its original sanitary and drinking qualities (called “polluted water” in this document), into the potable water distribution system whenever the pressure of the latter is temporarily lower than in the polluted circuit.
This document covers the mechanical disconnectors of PN 10 that are capable of working without modification or adjustment:
— at any pressure up to 1,0 MPa (10 bar);
— in permanent duty at a limit temperature of 65 °C and 90 °C for 1 h maximum.
It specifies also the test methods and requirements for verifying these characteristics, the marking and the presentation at delivery.
Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch Rückfließen - Rohrtrenner, durchflussgesteuert - Familie G, Typ B
Dieses Dokument legt die maßlichen und physikalisch-chemischen Anforderungen, die Anforderungen an die Konstruktion, die hydraulischen, mechanischen und akustischen Anforderungen an durchflussgesteuerte Rohrtrenner, Familie G, Typ B, fest.
Dieses Dokument ist anzuwenden für durchflussgesteuerte Rohrtrenner der Nennweiten DN 8 bis DN 250, die verhindern sollen, dass Wasser, das seine ursprüngliche Qualität für sanitäre Zwecke und als Trinkwasser verloren hat (in diesem Dokument „verunreinigtes Wasser“ genannt) in das Trinkwasserversorgungsnetz zurückfließt, wenn der Druck in diesem Netz vorübergehend niedriger ist als in dem verunreinigten Kreislauf.
Dieses Dokument behandelt die mechanischen Rohrtrenner mit der Druckstufe PN 10, die ohne Abänderung oder Nachstellung funktionsfähig sind:
— bei jedem Druck bis 1,0 MPa (10 bar);
— unter Dauerbelastung bei einer Grenztemperatur von 65 °C sowie bei 90 °C für höchstens 1 h.
Dieses Dokument legt ferner die Prüfverfahren und die Anforderungen für den Nachweis dieser Eigenschaften, die Kennzeichnung und den Lieferzustand fest.
Dispositifs de protection contre la pollution par retour de l’eau potable - Disconnecteur mécanique actionné en fonction du débit - Famille G, type B
Le présent document spécifie les caractéristiques dimensionnelles, physico chimiques, de conception, hydrauliques, mécaniques et acoustiques des disconnecteurs mécaniques actionnés en fonction du débit de famille G, type B.
Le présent document s’applique aux disconnecteurs mécaniques actionnés en fonction du débit dont le diamètre nominal va de DN 8 à DN 250, destinés à éviter le retour d’une eau ayant perdu ses qualités sanitaires et alimentaires d’origine (appelée « eau polluée » dans le présent document) dans le réseau d’eau potable lorsque la pression dans ce dernier est temporairement plus faible que dans le circuit pollué.
Le présent document couvre les disconnecteurs mécaniques de PN 10 pouvant fonctionner sans modification ni réglage :
— à toute pression jusqu’à 1,0 MPa (10 bar) ;
— en service continu à une température limite de 65 °C et 90 °C pendant une durée d’une heure maximum.
Il spécifie également les méthodes d’essai et les exigences pour vérifier leurs caractéristiques, le marquage et la présentation à la livraison.
Naprave za varovanje pitne vode pred onesnaženjem zaradi povratnega toka - Mehanski ločilniki, aktivirani s pretokom - Družina G, tip B
Ta dokument določa dimenzijske, fizikalno-kemijske, konstrukcijske, hidravlične, mehanske in akustične lastnosti mehanskih ločilnikov, aktiviranih s pretokom, družina G, tip B.
Ta dokument se uporablja za mehanske ločilnike, aktivirane s pretokom, nazivnih velikosti od DN 8 do DN 250, namenjene preprečevanju povratnega toka vode, ki je izgubila prvotne sanitarne in pitne lastnosti (v tem dokumentu imenovana »onesnažena voda«), v sistem za distribucijo pitne vode, kadar koli je tlak v sistemu začasno nižji kot v onesnaženem krogotoku.
Ta dokument zajema mehanske ločilnike PN 10, ki lahko delujejo brez spreminjanja ali prilagajanja:
– pri poljubnem tlaku do 1,0 MPa (10 bar);
– pri trajnem obratovanju največ 1 uro ob mejni temperaturi 65 °C in 90 °C.
Določa tudi preskusne metode in zahteve za preverjanje teh lastnosti, označevanje in predstavitev ob dobavi.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2022
Naprave za varovanje pitne vode pred onesnaženjem zaradi povratnega toka -
Mehanski ločilniki, aktivirani s pretokom - Družina G, tip B
Devices to prevent pollution by backflow of potable water - Mechanical disconnector, flow
actuated - Family G, Type B
Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch
Rückfließen - Rohrtrenner, durchflussgesteuert - Familie G, Typ B
Dispositifs de protection contre la pollution par retour de l’eau potable - Disconnecteur
mécanique actionné en fonction du débit - Famille G, type B
Ta slovenski standard je istoveten z: EN 13434:2021
ICS:
13.060.20 Pitna voda Drinking water
23.060.50 Blokirni ventili Check valves
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 13434
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 23.060.50
English Version
Devices to prevent pollution by backflow of potable water
- Mechanical disconnector, flow actuated - Family G, Type
B
Dispositifs de protection contre la pollution par retour Sicherungseinrichtungen zum Schutz des Trinkwassers
de l'eau potable - Disconnecteur mécanique actionné gegen Verschmutzung durch Rückfließen -
en fonction du débit - Famille G, type B Rohrtrenner, durchflussgesteuert - Familie G, Typ B
This European Standard was approved by CEN on 8 November 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 13434:2021 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 Denomination. 9
5 Designation . 9
6 Symbolization . 9
7 Physical-chemical characteristics. 10
7.1 General. 10
7.2 Materials . 10
7.2.1 General. 10
7.2.2 Dezincification resistant copper alloy . 10
7.3 Surface of the body . 10
7.3.1 General. 10
7.3.2 Epoxy Coating . 10
7.3.3 Polyamide Powder based Coating . 10
7.3.4 Other coatings . 10
8 Design . 11
8.1 General. 11
8.2 Relief valve/Obturator . 11
8.2.1 General requirements . 11
8.2.2 Mechanical Disconnector Family G, Type B . 11
8.3 Disconnection distance . 12
9 Characteristics and tests . 12
9.1 General. 12
9.2 General tolerances . 12
9.2.1 Tolerance of set parameters . 12
9.2.2 Accuracy of measuring instruments . 12
9.3 Expression of the results . 12
9.4 Dimensional characteristics . 12
9.4.1 Connections . 12
9.4.2 Pressure tapping . 12
9.5 Mechanical characteristics . 13
9.5.1 General. 13
9.5.2 Mechanical resistance of the body under pressure . 13
9.5.3 Endurance . 14
9.5.4 Torque test of Captive rotating Nuts and Bending Strength – Tightness of the Body 15
9.6 Leak tightness characteristics . 16
9.6.1 Verification of the leak tightness of the downstream check valve in closing
direction . 16
9.6.2 Verification of the leak tightness of check valve device (opening direction) . 17
9.6.3 Verification of the leak tightness of the upstream spring loaded obturator in drain
position at low pressure (in the opening direction) . 17
9.7 Hydraulic characteristics . 18
9.7.1 Test rig— General circuit . 18
9.7.2 Verification of the pressure loss as a function of flow rate . 19
9.7.3 Verification of the opening and closing pressures of relief valve . 20
9.7.4 Verification of the relief valve flow rate . 20
9.8 Compatibility with the products used for shock disinfection of the networks . 21
9.8.1 Requirement . 21
9.8.2 Test method . 21
9.9 Acoustic tests . 21
9.9.1 General . 21
9.9.2 Procedure . 21
10 Order of testing . 22
11 Marking and technical documents . 23
11.1 General . 23
11.2 Marking . 23
11.3 Technical documents . 24
12 Presentation at delivery . 24
Annex A (informative) Examples of presentation of test results. 25
Bibliography . 28
European foreword
This document (EN 13434:2021) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
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 June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
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.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the United
Kingdom.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption caused
by the product covered by this document:
1) 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;
2) it should be noted 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.
1 Scope
This document specifies the dimensional, physical-chemical, design, hydraulic, mechanical and acoustic
characteristics of mechanical disconnectors, flow actuated Family G, Type B.
This document is applicable to mechanical disconnectors flow actuated in nominal sizes DN 8 up to
DN 250, intended to prevent the return of water having lost its original sanitary an
...
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