Back Draught Shutter

  • Prevents the return of air when the ventilator is not working, avoiding the entry of dust, smoke and odors.


  • Casing made of galvanized sheet metal and two semicircular butterfly wings.
  • Suitable for application in a circular air duct.
  • It has an elastic ring inside for tightness.
  • Dimensions from 100mm to 500mm.
  • Also available with high impact ABS thermoplastic material in 3 sizes 100mm, 125mm and 150mm.