When more than one boiler is connected to the main steam header, a stop checkvalve should be installed in the pipeline between each boiler and the header.
如果连接主蒸汽热水器的锅炉不止一个，则在每个锅炉与热水器之间的管路上都应该安装一个截止止回阀。
2
1 before the fire, steam boiler, should check the valve pipe, steam pipe, pressure gauge, safety valve, water level gauge, drain valve is in good condition.