Backdraft Dampers
Light duty commercial backdraft (Pressure Relief) applications.
CB-601
Backdraft/Barometric Extruded Aluminum Damper (up to 4000 fpm)

Application
Model CB-600 extruded aluminuml backdraft/barometric damper, up to 4000 fpm.
Backdraft - used in ventilation systems to allow airflow in one. direction and prevent airflow in the opposite direction.
Barometric Damper - regulate and release the built-up pressure.