When more than one boiler is connected to the mainsteam header, a stop check valve 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
Stem steam leakage from mainstopvalve and governor valve, drainage of front and rear steam sealing, etc shall all be directed into the conduit, and then be discharged into the gutter.
主汽门阀杆及调节汽阀阀杆漏气，前后汽封疏水等都引入集水管再排入地沟。
3
The paper describes some jamming phenomena at intermediate pressure mainstopvalve on a 600MW steam turbine, reasons are analyzed and some effective methods are carried out.