Elta Multiflow SMB550/4-3AC Inline Mixed Flow Box Fan Three Phase AC - 550mm

The Elta Multiflow SMB550/4-3AC is a 550mm square inline mixed flow box fan with a three phase AC motor, moving up to 7952 m³/h in free air and still delivering 914 m³/h against 500 Pa. It fits straight into 550mm ductwork on Ductmate flanges at each end.The 4 pole motor runs at 1385 rpm on a 380 to 415V 50Hz supply, absorbing 1.064 kW with a peak current of 2.33 A, and has sealed for life bearings. The casing is stiffened pre-galvanised sheet steel, the impeller has 7 backward curved aerofoil blades in high performance composite, and it handles air up to 60°C. Elta give a 12 month warranty. 3 Phase AC Motor Up to 7952 m³/h Speed Controllable What it is best used forLarger commercial systems on a three phase supply with 550mm ductwork: commercial kitchen canopy extract, restaurant and bar extract, larger plant rooms, lift motor rooms and general HVAC supply or extract in offices, schools and retail units. It holds 7243 m³/h at 100 Pa and 5386 m³/h at 300 Pa, so it handles longer runs with silencers and fittings.Above about 400 Pa the airflow drops quickly (914 m³/h at 500 Pa). For bigger volumes at those pressures, the SMB650/4-3AC keeps 3503 m³/h at 500 Pa. It is also a three phase fan only at this airflow: the single phase SMB550 moves far less air.Why choose this over alternativesAt 550mm the three phase model is a different class of fan from the single phase SMB550: 7952 m³/h in free air against around 5300 m³/h, and it reaches 500 Pa where the single phase version stops at 350 Pa. It draws 2.33 A per phase at 400V.Against the SMB500/4-3AC it roughly doubles the airflow for one size up in duct. If you are working close to the top of its curve, the SMB650/4-3AC gives more headroom.Installation notes Mount the fan at any angle in the duct, securely supported, and leave access for maintenance. It weighs 41 kg. Connect with the 550mm Ductmate flanges at each end. Elta's 550mm flexible connectors (063-0550-MFB) and anti vibration mounts (062-003) reduce transmitted n