Pressed bends are designed for building ventilation systems based on spiral and plain ducts. Seam welds improve the air tightness of tthe ventilation system, while the hemmed rim helps to avoid cutting injuries during handling and installation.
The piece is connected with a duct by inserting one into the other. The pressed form of the ventilation piece helps to reduce the flow resistance and the pressure loss. Air tightness can be increased to class B by wrapping the joints with the TAL, MET or DUCT sealing tape.
