【英文标准名称】: Double Check Detector Assembly Backflow Preventor 【原文标准名称】: 双重检验检测器组合防回流装置 【标准号】: ANSI/ASSE 1048-2005 【标准状态】: 现行 【国别】: 美国 【发布日期】: 2005-04-08 【实施或试行日期】: 【发布单位】: 美国国家标准学会(ANSI)【起草单位】: ASSE (Organization)【标准类型】: ()【标准水平】: ()【中文主题词】: 止回阀;管路【英文主题词】: piping;check valves【摘要】: DCDFs keep contaminated water from fire protection systems from flowing back into a potable water distribution system when the pressure in the fire sprinkler system is higher than the pressure in the potable water system. They detect low rates of flow up to 2 GPM within the sprinkler system caused by leakage or unauthorized use. They consists of 2 check valves, 2 shutoff valves and test cocks and a bypass line. This standard applies to Manifold DCDFs that consist of 2 or more complete DCDFs in parallel.【中国标准分类号】: Q81【国际标准分类号】: 91_140_60;23_060_50【页数】: 【正文语种】: 英语