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 Balancing / Regulating Dampers UV Products Iris Dampers Drop Plenum Diffusers 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