标准编号：ISO 9635-4:2014
中文名称：农业灌溉设备 灌溉阀 第4部分：空气阀
英文名称：Agricultural irrigation equipment — Irrigation valves — Part 4: Air valves
发布日期：2014-11
标准范围
This part of ISO 9635 specifies construction and performance requirements and test methods for airvalves, 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, designedto be directly operated, i.e. the force is applied to the obturator by the float, either directly or via amechanical linkage. The valves can be operated by a force applied through an adjustable pilot valve.
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