Rollforming your own TDF flanges with 16 forming stations on transverse duct ends during the manufacturing process has never been easier. The TDF flange, per Duct Construction Standard specifications, is formed on the machine's right-hand, TDF Clip is formed on another side. The frame adopts full steel welding structure with enough hardness and rigidity. It also has been heated processed and highly frequently vibrated. Adopting floor boring-milling machine for guaranteeing the precision