| <BR> | Stub lines branch off from larger distribution lines or the main line and end at the consumer device. Outlying consumers can be supplied through stub lines. It is also possible to supply a complete compressed air system with stub lines. They have the advantage of needing less material than ring lines. But they also have the disadvantage that they must be of larger size than ring lines and frequently cause high pressure losses. Stub lines should always have a non-return valve which can isolate them from the system. This makes servicing and repair work easier. |