本文件规定了液压和电液控制装置的安全要求，包括液压阀及其控制元件、阀组合、控制系统、管道和软管组件、测量装置、支腿和柱塞中的内置限压阀和止回阀以及紧急停止、启动警告，按制造商或其授权代表的规定使用的闭锁和控制装置。不包括压力发生器、支腿和闸板的内部阀门（如支腿底部阀门，见EN 1804-2:2020）。 注:本标准的其他部分涉及一些部件。 本文件适用于环境温度为-10°C至60°C的液压和电液控制装置。 本文件确定并考虑到: -液压和电液控制装置操作可能造成的危险； -可能产生此类危险的区域和操作条件； -可能造成伤害或损害健康的危险情况； -可能由沼气和/或可燃粉尘引起的危险。 本文件描述了减少这些危险的方法。 第4条列出了所涵盖的重大危险。 本文件未规定以下任何附加要求: -在特别腐蚀性环境中使用； -施工、运输、停用过程中发生的危害； -地震。 完整的液压车顶支架由支撑装置（EN 1804-1:2020）、支腿和支撑油缸（EN 1804-2:2020）以及液压和电液控制装置（EN 1804-3:2020）组成。本多部分文件的每一部分都阐述了本多部分系列各部分范围内所述组件的安全要求。 本文件不适用于出版日期前制造的液压和电液控制系统。

This document specifies the safety requirements for hydraulic and electro hydraulic control devices, including hydraulic valves and their control elements, valve combinations, control systems, pipes and hose assemblies, measuring devices, built-in pressure limiting and check valves in legs and rams and, as well emergency stop, start warning, blocking- and control unit when used as specified by the manufacturer or his authorized representative. Excluded are pressure generators, and internal valves of legs and rams (e.g. leg bottom valves, see EN 1804-2:2020). NOTE Some components are dealt with in other parts of this standard. This document applies to hydraulic and electro hydraulic control devices at ambient temperatures from -10 °C to 60 °C. This document identifies and takes into account: - possible hazards which can be caused by the operation of hydraulic and electro hydraulic control devices; - areas and operating conditions which can create such hazards; - hazardous situations which can cause injury or can be damaging to health; - hazards which can be caused by firedamp and/or combustible dusts. This document describes methods for the reduction of these hazards. A list of significant hazards covered appears in Clause 4. This document does not specify any additional requirements for: - use in particularly corrosive environments; - hazards occurring during construction, transportation, decommissioning; - earthquakes. A complete hydraulic powered roof support consists of the support units (EN 1804-1:2020), legs and support rams (EN 1804-2:2020) and the hydraulic and electro hydraulic controls (EN 1804-3:2020). Each part of this multipart document addresses the safety requirements of the components mentioned in the scopes of the respective parts of this multipart series. This document is not applicable to hydraulic and electro hydraulic control systems manufactured before the date of its publication.