本文件规定了能够自动输送预设水量的容积阀的一般要求和试验方法。它适用于仅由管道压力和流量驱动，且不需要任何其他外部能源的阀门。 注:容积阀通常需要在不同流速和温度在5°C和50°C之间的不同质量的灌溉水下正确运行。

This document specifies general requirements and test methods for volumetric valves able to automatically deliver preset quantities of water. It is applicable to valves actuated by pipeline pressure and flow alone, and which do not need any other, external, source of energy. NOTE Volumetric valves are typically required to operate correctly with different qualities of irrigation water at a variety of flow rates and at temperatures between 5 °C and 50 °C.