![header thumbnail](/images/publishers\nbn_cover.gif)
NBN EN 1074-2 : 2000 AMD 1 2004
Current
The latest, up-to-date edition.
![header thumbnail](/images/publishers\nbn_cover.gif)
VALVES FOR WATER SUPPLY - FITNESS FOR PURPOSE REQUIREMENTS AND APPROPRIATE VERIFICATION TESTS - PART 2: ISOLATING VALVES
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Design requirements
5 Performance requirements
5.1 Mechanical strength
5.1.1 Resistance to internal pressure of the
shell and of all pressure containing
components
5.1.2 Resistance of the obturator to
differential pressure
5.1.3 Resistance to the valve to bending
5.1.4 Resistance of valves to operating loads
5.2 Leak-tightness
5.2.1 Leak-tightness of the shell and of all
pressure containing components
5.2.2 Seat tightness
5.2.3 Maximum operating torque (MOT) for
operation and leak-tightness
5.2.4 Leak-tightness of gearboxes to external
pressure
5.3 Hydraulic 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 resistance of valves
to operating loads (see 5.1.4)
Annex B (normative) Torque requirements for gate valves to be
operated by ring key and bar (see 5.2.3
and Annex A)
Annex C (normative) Test method for the operation of valves
(see 5.2.3)
Annex D (normative) Test method for the endurance of valves
(see 5.5)
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.