BS EN 12729:2023
Devices to prevent pollution by backflow of potable water. Controllable backflow preventer with reduced pressure zone. Family B. Type A

Standard No.

BS EN 12729:2023

Release Date

1970

Published By

British Standards Institution (BSI)

Latest

BS EN 12729:2023

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.

BS EN 12729:2023 Referenced Document

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• EN 1267 Industrial valves - Test of flow resistance using water as test fluid*， 2012-01-01 Update
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• EN ISO 2812-2 Paints and varnishes - Determination of resistance to liquids - Part 2: Water immersion method (ISO 2812-2:2018)*， 2018-12-12 Update
• EN ISO 3822-1 Acoustics - Laboratory tests on noise emission from appliances and equipment used in water supply installations - Part 1: Method of measurement - Amendment 1: Measurement uncertainty (ISO 3822-1:1999/Amd 1:2008)*， 2008-12-15 Update
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• ISO 228-1 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation*， 2000-09-01 Update

BS EN 12729:2023 history

• 1970 BS EN 12729:2023 Devices to prevent pollution by backflow of potable water. Controllable backflow preventer with reduced pressure zone. Family B. Type A
• 0000 BS EN 12729:2002(2009)
• 2003 BS EN 12729:2003 Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B. Type A
• 2003 BS EN 12729:2002 Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B. Type A