Smoke Damper DOL-1RK (Duct Version) Application: DOL-1RK smoke damper is designed to remove smoke and heat in cases of fire. The damper normal position is closed. Upon an outburst of fire, the damper opens, driven by electric motor, and thus allows the removal of smoke and heat from the room on fire. Short Description: The DOL-1RK smoke damper is a modification of the DOL-1R damper. It is made of incombustible materials (galvanised housing and brass bearing) and is fitted with a seal to prevent the propagation of smoke. Differences between DOL-1RK and DOL-1R DOL-1RK (duct version): Installation: at the penetration of a ventilation duct through a fire protection pillar Installation position: vertical, horizontal Drive: electric motor DOL-1R: Installation: on an external wall, on a duct, on a duct end Installation position: vertical Drive: electric magnet Fire Resistance and Certificates 90 min (K90), certificate by ZAG Ljubljana 60 min, certificate by VNIPO Moscow, Russia