How should the butterfly valve supporting expansion joint be designed when it is installed:

Double flange limit expansion joint is used more often in engineering. When the expansion joint is installed, the installation position of fixed bracket and expansion joint should be marked out according to the design requirements.
 When the pipe double flange limit expansion joint is in operation, there will be a reaction force, and the role of the fixed bracket is to bear the reaction force of both. Therefore, the fixed bracket must be installed at the designed position, and the pipe should be firmly fixed on the bracket. The movable bracket should not hinder the movement of the pipe due to thermal expansion. When the pipe slides on the metal cushion of the bracket beam or support, the bracket should not be deflected or make the slide bracket stuck. The sliding bracket should be flexible, and there should be a gap of 3-5mm on both sides of the sliding bracket and the sliding groove to ensure a certain shift value. Indoor and outdoor with double flange limit expansion joint (expansion force) of the pipeline, double flange limit expansion joint on both sides, should be installed 1-2 guide bracket to ensure that the pipeline in the bracket expansion does not deviate from the center line; insulation pipeline in the guide bracket should be set according to the number of design requirements, such as the use of too much, but will prevent the free contraction of the pipeline; installed in the wall bracket should make the distance between the center of the pipeline and the wall in line with the design Requirements, general insulation pipeline protective layer surface from the wall or column surface net distance of not less than 60mm; not insulated riser, branch pipe from the wall net distance of 30mm. installation of pipeline double flange limit expansion joint, should be in the prefabricated according to the specification requirements of good pre-stretching, and make a good record. Fixed according to the position and connected well with the pipeline.