UNI EN 12729 : 2003
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
DEVICES TO PREVENT POLLUTION BY BACKFLOW OF POTABLE WATER - CONTROLLABLE BACKFLOW PREVENTER WITH REDUCED PRESSURE ZONE - FAMILY B - TYPE A
30-03-2023
01-03-2003
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Denomination
5 Designation
6 Symbolization
7 Physico-chemical characteristics
7.1 Materials
7.2 Nature of the materials
8 Design
8.1 General
8.2 Relief valve
9 Characteristics and tests
9.1 General
9.2 General tolerances
9.3 Expression of the results
9.4 Dimensional characteristics
9.5 Mechanical characteristics
9.6 Tightness characteristics
9.7 Hydraulic characteristics
10 Order of testing
11 Marking and technical documents
11.1 Marking
11.2 Technical documents
12 Presentation at delivery
Annex A (informative) Examples of presentation of test results
Bibliography
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