prEN 12729

Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A

General information

40.60 Close of voting   Oct 8, 2020

CEN

CEN/TC 164 Water supply

European Norm

13.060.20   Drinking water | 91.140.60   Water supply systems

Scope

This document specifies the field of application, the dimensional, the physico-chemical, the design, the hydraulic, the mechanical, and the acoustic characteristics of controllable backflow preventers with reduced pressure zone Family B Type A.
This document covers controllable backflow preventers of Family B Type A, with reduced pressure zones, intended to prevent pollution of potable water by backflow, caused by backsiphonage or by backpressure.
It is applicable to controllable backflow preventers in denominations DN 6 up to DN 250.
It covers controllable backflow preventers 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.

Related legislation

Legislation related to this standard

98/83/EC

Quality of water intended for human consumption

Life cycle

PREVIOUSLY

Revises
EN 12729:2002

NOW

IN_DEVELOPMENT
prEN 12729
40.60 Close of voting
Oct 8, 2020