shrinkless tube expander; saves copper tubes by 2.5% to 3%, saves energy ... U shape locks to fix the two ends of copper tubes before expanding operation. In this way, tube shrinkage ... compared with traditional expanders. This newly built machine saves copper tubes by 2.5% to 3%, and saves energy ... , tube length=1300mm)Powerpower depends on number of tubes and force needed to expandPhase 3, 380V±10% ...