Standard Swedish standard · SS-EN 12729

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

Status: Withdrawn

· Replaced by: SS-EN 12729:2023
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Standard Swedish standard · SS-EN 12729

Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A
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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 °C and 90 °C for 1 h maximum. It specifies also the test methods and requirements for verifying their characteristics, the marking and the presentation at delivery.

Subjects

Drinking water (13.060.20) Water supply systems (91.140.60)


Buy this standard

Standard Swedish standard · SS-EN 12729

Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A
Subscribe on standards - Read more Dölj
Price: 1 152 SEK
standard ikon pdf

PDF

Price: 1 152 SEK
standard ikon

Paper

Price: 1 843,20 SEK
standard ikon pdf + standard ikon

PDF + paper

Show more Show less

Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-34453

Edition: 1

Approved: 8/15/2003

No of pages: 33

Replaced by: SS-EN 12729:2023