BS EN 12729:2002
Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B. Type A

Standard No.

BS EN 12729:2002

Release Date

2003

Published By

British Standards Institution (BSI)

Status

Be replaced 2003-01

Replace By

BS EN 12729:2003

Latest

BS EN 12729:2023

Replace

97/101031 DC-1997

Scope

This European Standard specifies the field of application, the dimensional, the physico-chemical, the design, the hydraulic, the mechanical, and the acoustic characteristics of controllable backflow preventer with reduced pressure zone Family B Type A. This standard covers controllable backflow preventers of Family B Type A, with reduced pressure zones, intended to prevent backflow by backsiphoning or backpressure of water into the potable water distribution system whenever the pressure of the latter is lower than the system located downstream. It is applicable to controllable backflow preventers in denominations DN 8 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 ℃ and 90 ℃ for 1 h maximum. It specifies also the test methods and requirements for verifying their characteristics, the marking and the presentation at delivery.

BS EN 12729:2002 Referenced Document

• EN 1092-1 Flanges and their joints - Circular flanges for pipes@ valves@ fittings and accessories@ PN designated - Part 1: Steel flanges*， 2018-04-01 Update
• EN 1092-2 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 2: Cast iron flanges*， 2023-11-29 Update
• EN 1717:2000 Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow*， 2024-04-18 Update
• EN 806-1:2000 Specifications for installations inside buildings conveying water for human consumption - Part 1: General
• 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
• EN ISO 3822-3:1997 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 Incorporates Amendment A1: 2009
• EN ISO 6509 Corrosion of Metals and Alloys - Determination of Dezincification Resistance of Brass (ISO 6509:1981)
• ISO 228-1 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation
• ISO 7-1 Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation TECHNICAL CORRIGENDUM 1
• ISO 9227 Corrosion tests in artificial atmospheres — Salt spray tests — Amendment 1: Footnote of Warning*， 2024-02-19 Update

BS EN 12729:2002 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