Check detector seals , and replace as necessary . clean or replace detector jets as necessary 检查检测器密封垫,如有必要就替换。如有必要清洗或替换检测器喷嘴。
Double check detector assembly shall be installed on fire protection systems when connected to a potable water supply 当消防系统连接到饮用水供应系统时,应该安装一个双止回阀总成。
A double check detector assembly shall be installed on fire protection systems when connected to a potable water supply 当消防系统连接到饮用水供应系统时,应该安装一个双止回阀总成。
Series 774xdcda double check detector assemblies are designed to prevent the reverse flow of polluted water from entering the potable water supply 系列747xdcda双止回阀检测器总成用于防止污水回流进入饮用水系统中。