Abstract 

ISO 9635-4:2006 specifies construction and performance requirements and test methods for air 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 hydraulically operated air irrigation valves of DN 15 (1/2 inch) diameter or greater, designed to be directly operated, i.e. the force is applied to the obturator by the float, either directly or via a mechanical linkage. The valves can be operated by a force applied through an adjustable pilot valve.


General information

  • Status :  Withdrawn
    Publication date : 2006-11
  • Edition : 1
  • :
    ISO/TC 23/SC 18
    Irrigation and drainage equipment and systems
  • 65.060.35
    Irrigation and drainage equipment

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