ISO 9635-4:2014 PDF

Scope: This part of ISO 9635 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 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.

ISO 9635-4:2014 Referenced Document

EN 736-1:1995 Valves - Terminology - Part 1: Definition of types of valves
EN 805:2000 Water supply - Requirements for systems and components outside buildings
ISO 9635-1:2014 Agricultural irrigation equipment - Irrigation valves - Part 1: General requirements
ISO 9635-2:2014 Agricultural irrigation equipment - Irrigation valves - Part 2: Isolating valves

2014 ISO 9635-4:2014 Agricultural irrigation equipment - Irrigation valves - Part 4: Air valves
2006 ISO 9635-4:2006 Agricultural irrigation equipment - Irrigation valves - Part 4: Air valves