Systemair DVS 450D4 SA - Centrifugal roof fan, vertical discharge

• Available from sizes 400 up to 630 • High efficiency • Speed-controllable • Integral thermal contacts • Excellent sound level • Extensive range of accessories • Maintenance-free and reliable The DVS/DHS/DVSI sileo, in sizes from 400 up to 630, is well suited for applications requiring high air volumes at medium pressure and very low noise levels. These models have 3D profiled impellers with backward curved blades and external rotor motors. All motors are speed controllable over the voltage. For speed controlling of the DVS/DHS/DVSI sileo roof fans with a frequency converter a type with all pole sine filter is needed! The motors are suspended on effective vibration dampers. To protect the motors from overheating the sileo range motors are equipped with thermal contacts with external leads for connection to a motor protection device. The casing is made from aluminum and the base frame from galvanized steel. Suitable for coastal applications. The impellers of the sileo types are manufactured from high-perfo...