ISO 9635-5:2014规定了控制阀的结构、性能要求和试验方法，这些控制阀用于在温度不超过60°C的灌溉系统中运行，其中可能含有肥料和农业中使用的其他类型和浓度的化学品。 它适用于直径为DN 15（1/2英寸）或更大的液压操作控制灌溉阀，设计用于从完全打开到完全关闭的任何位置。阀门可以直接操作（即通过弹簧或隔膜向闭孔器施加的力），也可以通过先导操作（即通过隔膜通过可调先导阀施加的力）。这些阀门也可以用作止回阀。

ISO 9635-5:2014 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.