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  • BSI
    20/30409071 DC BS EN 13434. Devices to prevent pollution by backflow of potable water. Mechanical disconnector, hydraulic actuated. Family G, type B
    Edition: 2020
    $44.66
    / user per year

Description of 20/30409071 DC 2020

This document specifies, the dimensional, the physical-chemical, the design, the hydraulic, the mechanical and the 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 disconnector 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.



Standard Number20/30409071 DC
TitleBS EN 13434. Devices to prevent pollution by backflow of potable water. Mechanical disconnector, hydraulic actuated. Family G, type B
StatusDefinitive
Publication Date2020-04-30
Identical National Standard OfprEN 13434
DescriptorsCheck valves, Identification methods, Industrial, Cast-iron, Valves, Inspection, Dimensions, Marking, Ratings
ICS23.060.50 Check valves
CommitteeB/504
PublisherBSI
Pages31

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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