标准摘要
[中文适用范围]： ISO 9635 的这一部分规定了空气阀的结构和性能要求以及测试方法，这些空气阀适用于水温不超过 60 °C 的灌溉系统，其中可能含有农业中使用的肥料和其他类型和浓度的化学品。 它适用于直径为 DN 15 或更大的液压操作空气灌溉阀，设计为直接操作，即力通过浮子直接或通过机械联动施加到闭塞器上。 这些阀门可以通过可调节先导阀施加的力来操作。 [外文原描述]： 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.
英文名称Agricultural irrigation equipment — Irrigation valves — Part 4: Air valves