Multiflow SMB650 Inline Flow Box Fan Single Phase AC 650mm

The Elta Multiflow SMB650/4-1AC is a 650mm square inline mixed flow box fan with a single phase AC motor, moving up to 7974 m³/h in free air and 6786 m³/h against 200 Pa. It fits straight into 650mm ductwork on Ductmate flanges at each end.The 4 pole motor runs at 1380 rpm on a 220 to 240V 50Hz supply, absorbing 1.143 kW with a peak current of 5.28 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. 1 Phase AC Motor Up to 7974 m³/h Speed Controllable What it is best used forThe largest single phase SMB, for high volume extract and supply on 650mm ductwork: large commercial kitchen canopies, restaurants, warehouses, factory units, sports halls and plant rooms. It holds 7445 m³/h at 100 Pa, 6786 m³/h at 200 Pa and still 4381 m³/h at 400 Pa.At 1.143 kW and up to 5.28 A it needs a dedicated circuit and the 16 A transformer controller for speed control. Where three phase is available, the SMB650/4-3AC gives more air for a much lower running current.Why choose this over alternativesAgainst the three phase SMB650/4-3AC, this single phase model moves less air (7974 against 10480 m³/h in free air) and draws 5.28 A on 230V against 2.89 A per phase. Choose it where a three phase supply is not available.Within the single phase range, it sits above the SMB550/4-1AC (5314 m³/h free air), and is the largest single phase SMB Elta make.Installation notes Mount the fan at any angle in the duct run, securely supported, and leave access for maintenance. It weighs 47 kg. Connect with the 650mm Ductmate flanges at each end. Elta's flexible connectors (063-0650-MFB) and anti vibration mounts (062-003) reduce transmitted noise and vibration. Wire to Elta diagram 152-104A on a 230V single phase supply. The thermal cut out terminals (TB) must be connected into the control circuit, and Elta specify the 149-TC116 transformer controller for speed control. Fit a means of isolation and earth the fan. Fuses and breakers only give short circuit protection, so Elta advise a starter with overload protection for the motor. Check rotation, airflow direction and running current on first start. Not for corrosive or explosive atmospheres. Locate the discharge away from open flues, and inspect and clean the impeller and motor at least every 12 months. You'll also need Elta 149-TC116 single phase 5 step transformer controller (16 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 SMB650/4-1AC Type Square inline mixed flow box fan Duct size 650mm (Ductmate flanges) Max airflow 7974 m³/h Static pressure 400 Pa Motor Single phase AC, 220 to 240V 50Hz, 4 pole, 1380 rpm Power 1.143 kW (5.28 A peak) Noise 58 dB(A) inlet, 61 dB(A) outlet at 3m Max air temperature 60°C Warranty 1 Year Manufacturer Airflow at 100 Pa 7445 m³/h Airflow at 200 Pa 6786 m³/h Overall efficiency 44.6% at best efficiency point SFP at free air 0.48 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-TC116 (5 step transformer) Wiring diagram 152-104A Manuals & Guides Elta Multiflow SMB Datasheet Elta Multiflow SMB Installation Manual