90.92 Standard to be revised Apr 25, 2023
ISO
ISO/TC 23/SC 18 Irrigation and drainage equipment and systems
International Standard
65.060.35 Irrigation and drainage equipment
Published
ISO 9635-4:2014 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.
WITHDRAWN
ISO 9635-4:2006
PUBLISHED
ISO 9635-4:2014
90.92
Standard to be revised
Apr 25, 2023
IN_DEVELOPMENT
ISO/AWI 9635-4