该Eruopean标准适用于WC的冲洗阀和具有自动液压闭合的小便器的阀门，用于:-WC平底锅prEN 997; - 红线虹吸动作小便器它不适用于无接触检测阀。它旨在规定: - 标记，识别，物理化学，尺寸密封性，压力特性，液压，机械耐久性和声学特性，以确定大气中断器（气隙）的要求，这将构成一个整体部分的WC和小便器冲洗阀具有自动关闭

This Eruopean Standard applies to flushing valves for WCs and valves for urinalswith automatic hydraulic closure, intended for: -WC pans prEN 997; -urinals; -siphon action urinals. It does not apply to no-contact detection valves. It is intended to specify: -the marking, identification, physical-chemical, dimensio- nal leaktightness, pressure behaviour, hydraulic, mechanical endurance and acoustic characteristics to determine requirement for the atmospheric interrup- ters (air gaps) which shall form an integral part of WC and urinal flushing valves with automatic closure.