RDR Vakioilmamääräsäätimet

DescriptionRDR is a constant air volume flow controller with mechanical type of operation (no need for auxiliary energy or actuation). It is intended to control the constant air flow independently of the duct air pressure in the range of 50 Pa to 250 Pa. The constant air flow value can be set by a shifting dial within a range dependent on the size and configuration of the product. The cartridge type casing fits into the circular ducts of 80 mm up to 250 mm in diameter. Foreseen usage in residential premises, offices etc.Highlights• Easy adjustment• Simple and quick installation• Available from 80 mm to 250 mm• Self-adjusting with high precisionDesignRDR is a cartridge type controller for insertion into the circular duct. The flow control part is made from polymer material. The casing material on nominal sizes of ø 80 mm to ø 125 mm is polymer, 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.The air flow volume is controlled by the system composed from a dynamic pressure reactive damper, a calibrated spring and an adjustment mechanism with a position arresting screw.The controller can operate in horizontal and in vertical installation position.