Non-return (backdraft) Dampers – 125mm Diameter
Back draught shutters, also known as non-return dampers are designed to permit air to flow in only one direction.
Making them useful for applications where a duct is only used at intervals, and needs to be shut down when not in use to prevent heat loss or backflow.
068-0150-JF1 - 150dia - 300mm - Spigot Silencer - Elta
018-150 - DAMPER - 150mm - Elta
018-150-CLAMP - 150mm - Fast Clamps - Elta 
