Ventech ventilation louver grilles directly sale for long corridors

Back Draught Damper

Applications:

Ventilation damper the type back draught damper is a non-return damper for extract air. Made of galvanized sheet, for installation into round ducts, to shut the duct automatically when extraction of air stops. Prevent the outside air flow back.

Descriptions:

● Nominal sizes: 100, 125, 150, 200, 250, 315.

● For non-return air control.

● Fame made of galvanized sheet 0.8mm, inner shutter made of aluminum 0.3mm.

● For installation into round ducts.

● Specially designed springs allow accurate control of the shutter.