The Design Principle   Even if there are numerous versions of dismantling joints available for different applications, the basic principle is always the same:   The flange adaptor is located on one side of the dismantling joint. It is connected securely to the pipe or valve via the flange. Flange bore holes corresponding to the respective pressure rating or standard are available. The F-piece (flanged spigot), which has a flange at the other end of the dismantling joint for connection in the other direction, is pushed into the flange adaptor. For the installation and removal of valves with longitudinal adjustment of maximum ± 25 mm, these two parts can be pushed against one another so that the dismantling joint can be inserted between the pipe sections or pipeline and valve. When the nuts are tightened, the gasket is compressed between the follower (end-ring) and the central ring and pressed against the pipe of the F-piece. The high-quality rubber gasket ensures that the system is always leaktight on tightening of the nuts. Threaded tie-rods are used for the subsequent restraining and flange connection, depending on the type of dismantling joint used. At the same time, they also serve to transfer the forces occurring on one side of the dismantling joint to the other side.