Structure of expansion joint:
The expansion joint is composed of four major parts: the pipe body, the pressure ring, the seal ring and the bolt. The pipe body and the pressure ring form the main structure of the product, while the rubber seal ring in the middle makes them have a sealing performance, so that the medium can flow freely in the expansion joint, and then the bolt can be fastened.The expansion joint can be axially expanded within a certain range, and can also overcome the offset of the pipeline docking within a certain angle, which can greatly facilitate the installation and dismantling of the valve pipeline, and can be freely expanded and contracted in the allowable expansion amount of the pipeline, and once the expansion amount is exceeded, it can play a limit to ensure the operation of the pipeline. It can transfer the pressure thrust of the connected parts and compensate the pipeline error, but cannot absorb the axial displacement. It is important for the loose connection of pump, valve, pipeline and other accessories. After installation and welding, the gland bolts are tightened diagonally and evenly so that it becomes a whole and has a certain displacement, which can transfer the axial thrust to the whole pipeline when it is working.
