1. In the project, the connected part between the pump and the pipeline is often designed with a flexible rubber joint (scientific name is rubber joint, shock-absorbing throat compensator), which is mostly buffering.2. The rubber joint for the pump is mainly used for damping, preventing the vibration of the pump running on the pipe and the deviation compensation caused by the pipe vibration, more convenient maintenance valve.3. When installing the rubber joint, it is strictly forbidden to instal