I.S. EN 1074-2:2000

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)

Defines the minimum fitness for purpose requirements for isolating valves to be connected to, or used in water supply systems, either above or below ground, carrying water for human consumption.