M00019025
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ISO DIS 9635-5 2013 Edition, September 30, 2013 AGRICULTURAL IRRIGATION EQUIPMENT - IRRIGATION VALVES - PART 5: CONTROL VALVES
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Availability date: 07/14/2021
Description / Abstract:
This part of ISO 9635 specifies construction and performance
requirements and test methods for control 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 control irrigation
valves of DN 15 (1/2 inch) diameter or greater, designed to operate
in any position, from fully open to fully closed. The valves can
either be directly operated (i.e. the force applied via a spring or
diaphragm to the obturator), or pilot-operated (i.e. the force is
applied through an adjustable pilot valve via a diaphragm). These
valves can also function as check valves.