RDR Constant Air Volume Controllers

Available in different sizes, the RDR is a constant air volume flow controller designed for a variety of settings, such as residential properties, offices and other commercial premises.  As it has a mechanical type of operation, it does not require auxiliary energy or actuation. RDR is a cartridge-type controller for easy insertion into circular ducts of 80mm to 250mm in diameter. It is intended to control the constant airflow independently of the duct air pressure in the range of 50 Pa to 250 Pa. The constant airflow value can be set by a shifting dial within a range dependent on the size and configuration of the product. 

The flow control part is made from polymer materials. The casing material on nominal sizes of ø 80 mm to ø 125 mm is polymer, and on nominal sizes of ø 150 mm to ø 250 mm is galvanized steel. A rubber gasket on the casing secures air-tight and stable installation in the duct.