NS EN 13959 : 1ED 2005
Current
The latest, up-to-date edition.
ANTI-POLLUTION CHECK VALVES - DN 6 TO DN 250 INCLUSIVE FAMILY E, TYPE A, B, C AND D
01-12-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Anti-pollution check valves
3.2 Flanged anti-pollution check valves; class a and
class b
3.3 Combined product
4 Nominal size
5 Designation
6 Marking and technical documents
6.1 Marking
6.2 Technical documents
7 Symbolization
8 General design characteristics
8.1 Overall length and diameters of check valves
8.2 End connections
8.3 Test and drain ports
8.4 Other characteristics
9 Physio-chemical characteristics
9.1 Materials
9.2 Nature of materials
10 Test Arrangements
10.1 Sequence of testing
10.2 Apparatus
11 Hydraulic and mechanical characteristics
11.1 High velocity (stage 1)
11.2 Flow rate/pressure loss (stage 2)
11.3 Mechanical strength of the body (stage 3)
11.4 Bending moment (stage 4)
11.5 Pressure tightness under a low reverse pressure
differential (stage 5)
11.6 Pressure tightness under a high reverse pressure
and verification that the check valve has not
jammed (stage 6)
11.7 Pressure differential at which the check valve
closes (stage 7)
11.8 Compatibility with products used for disinfection
of networks (stage 8)
11.9 Endurance (stage 9)
11.10 Pressure tightness under a low reverse pressure
differential (stage 10)
11.11 Pressure tightness under a high reverse pressure
and verification that the check valve has not
jammed (stage 11)
11.12 Pressure differential at which the check valve
closes (stage 12)
12 General working characteristics
12.1 Resistance to corrosion
12.2 Acoustic characteristics
13 Presentation at delivery
Annex A (informative) Numbers of test devices/tests
Describes the characteristics of anti-pollution check valves of DN 6 up to and including DN 250 that are suitable for use in drinking water systems.
DocumentType |
Standard
|
PublisherName |
Norwegian Standards (Norges Standardiseringsforbund)
|
Status |
Current
|
Standards | Relationship |
BS EN 13959:2004 | Identical |
UNI EN 13959 : 2005 | Identical |
EN 13959:2004 | Identical |
DIN EN 13959:2005-01 | Identical |
UNE-EN 13959:2005 | Identical |
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