NEN EN 1074-4 : 2000
Current
The latest, up-to-date edition.
VALVES FOR WATER SUPPLY - FITNESS FOR PURPOSE REQUIREMENTS AND APPROPRIATE VERIFICATION TESTS - PART 4: AIR VALVES
01-12-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Design requirements
5 Performance requirements
5.1 Mechanical strength
5.2 Leak-tightness
5.3 Airflow characteristics
5.4 Resistance to disinfection products
5.5 Endurance
6 Conformity assessment
6.1 General
6.2 Type tests
6.3 Control of production process and quality
system
7 Marking
8 Packaging
Annex A (normative) Test method for the airflow
characteristics of valves with an
air release function (see 5.3 and
5.3.1)
Annex B (normative) Test method for the airflow
characteristics of valves with an
air intake function (see 5.3 and
5.3.2)
Annex C (normative) Test method for the endurance of
valves with air intake and/or air
release functions (see 5.3 and 5.3.3)
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