BS ISO 9635-2:2014

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design requirements
5 Performance requirements
6 Conformity assessment
7 Marking
8 Packaging
Annex A (normative) - Test method for resistance
        of valves to operating loads
Annex B (normative) - Torque requirements for gate
        valves to be operated by ring key and bar
Annex C (normative) - Test method for operation of valves
Annex D (normative) - Test method for endurance of valves
Annex E (normative) - Method for sizing operating element
Bibliography

Defines construction and performance requirements and test methods for isolating valves, intended for operation in irrigation systems with water at temperatures not exceeding 60 degrees C, which can contain fertilizers and other chemicals of the types and concentrations used in agriculture.

This part of ISO9635 specifies construction and performance requirements and test methods for isolating valves, intended for operation in irrigation systems with water at temperatures not exceeding 60°C, which can contain fertilizers and other chemicals of the types and concentrations used in agriculture.

It is applicable to isolating irrigation valves of DN8 in diameter or greater, designed to operate in the fully open and fully closed positions, but which can also operate for extended time periods in any intermediate position.