NS EN 14367 : 1ED 2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
   3.1 non controllable backflow preventer with different
       pressure zones - Family C - Type A
   3.2 Specific use
4 Nominal size (denomination)
   4.1 Class a device
   4.2 Class b device
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 test methods
   9.1 General
   9.2 General tolerances
   9.3 Expression of the results
   9.4 End connections
   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 (normative) Complementary test methods on
                      backflow preventers CA class b with a
                      plastic body
Annex B (informative) Examples of presentation of test results

Defines the dimensional, the physico-chemical, the design, the hydraulic, the mechanical and the acoustic characteristics of non-controllable backflow preventer with different pressure zones, family C, type A, nominal sizes DN 6 to DN 50, nominal pressure PN 10.