Multiflow SMB650 4 3AC Inline Flow Box Fan Three Phase AC 650mm

The Elta Multiflow SMB650/4-3AC is a 650mm square inline mixed flow box fan with a three phase AC motor, moving up to 10480 m³/h in free air and still delivering 3503 m³/h against 500 Pa. It fits straight into 650mm ductwork on Ductmate flanges at each end.The 4 pole motor runs at 1320 rpm on a 380 to 415V 50Hz supply, absorbing 1.433 kW with a peak current of 2.89 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 10480 m³/h Speed Controllable What it is best used forHigh volume three phase extract and supply on 650mm ductwork: large commercial kitchen canopies, restaurants and food courts, plant rooms, warehouse and workshop ventilation, and general HVAC in larger commercial buildings. It moves 9670 m³/h at 100 Pa and still 7495 m³/h at 300 Pa, so it suits long, fitting heavy duct runs.It is more fan than a short run or small space needs; drop to the SMB550/4-3AC under about 7000 m³/h. For more than about 10000 m³/h at working pressure, use the SMB700/4-3AC.Why choose this over alternativesThe three phase SMB650/4-3AC moves 10480 m³/h in free air against 7974 m³/h for the single phase SMB650, and it draws 2.89 A per phase at 400V where the single phase model takes 5.28 A at 230V. On a site with three phase available it is the stronger and easier to supply option.Against the SMB550/4-3AC it adds about 2500 m³/h in free air and holds far more at high pressure (3503 against 914 m³/h at 500 Pa). For even larger volumes see the SMB700/4-3AC.Installation notes Mount the fan at any angle in the duct, securely supported, and leave access for maintenance. It weighs 47 kg. Connect with the 650mm Ductmate flanges at each end. Elta's 650mm flexible connectors (063-0650-MFB) and anti vibration mounts (062-003) reduce transmitted noise and vibration. Wire to Elta diagram 152-106A: star connection for a 400V three phase supply. To reverse rotation swap any two incoming supply cables, and check rotation and airflow direction on first start. Fit a means of isolation, earth the fan, and protect the motor with a starter that has overload protection; fuses and breakers only give short circuit protection. Not for corrosive or explosive atmospheres. Inspect and clean the impeller and motor at least every 12 months. You'll also need Elta 149-TC310 three phase transformer speed controller (10 A), available to order, ask us. Elta 650mm splitter silencer 068-0650-MFB, available to order, ask us. Elta 650mm flexible connectors 063-0650-MFB (each), available to order, ask us. Elta anti vibration mounts 062-003 and mounting brackets 060-MFB-01, available to order, ask us. Browse more inline mixed flow fans, commercial box fans or Elta fans, or call us for help choosing the right fan.Specifications Model SMB650/4-3AC Type Square inline mixed flow box fan Duct size 650mm (Ductmate flanges) Max airflow 10480 m³/h Static pressure 500 Pa Motor Three phase AC, 380 to 415V 50Hz, 4 pole, 1320 rpm Power 1.433 kW (2.89 A peak) Noise 57 dB(A) inlet, 61 dB(A) outlet at 3m Max air temperature 60°C Warranty 1 Year Manufacturer Airflow at 100 Pa 9670 m³/h Overall efficiency 44.3% at best efficiency point SFP at free air 0.47 W/(L/s) Dimensions 717 x 717mm overall, 500mm long Fixing holes 4 x 11mm on 686mm centres, 35mm flange Weight 47 kg Impeller Composite, 7 backward curved aerofoil blades Casing Pre-galvanised sheet steel Speed controller 149-TC310 (5 step transformer) Wiring diagram 152-106A Manuals & Guides Elta Multiflow SMB Datasheet Elta Multiflow SMB Installation Manual