Products Architectural Louvers, Dampers, Roof Curbs, Actuators, Grilles, Sunshades and more. Dampers - Round Dampers: Model:RI-F-O Oval Damper Flanged up to 5 APPLICATION The Model RI-F-O is an Oval control damper with a flanged style frame. It is designed to control airflow and provide shutoff in HVAC or industrial process control systems. RI-F-O DOCUMENTS - Submittal Sheet - RI-F-O BIM (REVIT) - Actuator Sizing Chart UV Products Iris Dampers Drop Plenum Diffusers Balancing / Regulating Dampers Louvers Dampers UL Listed Dampers Roof Curbs and Rails Sunshades Architectural Grilles Ventilators Doors Actuators Fans Air Measuring Products VAV Terminals Security Bars & Grilles Plenums Duct Take-Offs Custom Work Manufacturer Cross Referencing System View Now Previous Next