这种阀门应该具有青铜阀体，包括整合的止回阀，使得温度控制装置能够控制冷水和热水端口。
Valve shall have a bronze body, include integral check valves and operate so the thermostat controls the cold and hot water ports.
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。
When more than one boiler is connected to the main steam header, a stop check valve should be installed in the pipeline between each boiler and the header.
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