本文件提供了用于开关阀和控制阀的电动阀门执行机构的基本要求。它包括分类、设计、外壳和防腐指南，以及合格评定方法。 由执行机构制造商提供的电动执行机构和变速箱的组合在本文件的范围内。 本文件不包括电磁执行器、电液执行器和电动执行器，它们是阀门的组成部分。 订购前，买方与制造商/供应商商定了与本文件所述不同的其他要求或使用条件。

This document provides basic requirements for electric valve actuators, used for on-off and control valves. It includes guidelines for classification, design, enclosure and corrosion protection, and methods for conformity assessment. Combinations of electric actuators and gearboxes when supplied by the actuator manufacturer are within the scope of this document. This document does not cover solenoid actuators, electro-hydraulic actuators and electric actuators which are integral to the valves. Other requirements or conditions of use different from those indicated in this document are agreed between the purchaser and the manufacturer/supplier, prior to order.