SB400 CYL4 3 Biflow Bifurcated Cylindrical Axial Fan Three Phase AC 400mm

The Elta SB400-CYL4-3 is a 400mm Biflow SB bifurcated cylindrical axial fan. The motor sits in a tunnel outside the airstream, so the fan can move air at up to +200°C, or air carrying grease or dust, without that air passing over the motor. It moves up to 3636 m³/h in free air and 2516 m³/h at 100 Pa, the highest pressure in Elta's published table for this model.A 4 pole three phase AC motor (380-415V 50Hz) runs at 1400 rpm with a 250 W output and 0.69 A peak current. It is a foot mounted, totally enclosed IP55 motor with Class H insulation and sealed for life bearings. The adjustable pitch aerofoil impeller has pressure die cast aluminium blades, the steel casing is hot dip galvanised after fabrication and suitable for external mounting, and Elta give a 12 month warranty. 3 Phase AC Motor Up to 3636 m³/h Speed Controllable What it is best used forHigh volume hot or contaminated extract on 400mm duct: large commercial kitchen canopies, boiler houses, spray booths, foundry or heavy industrial process extract, and hot gas duties up to +200°C. At 50 Pa it moves 3240 m³/h.It is not rated for explosive atmospheres, so it is the wrong fan for ATEX zones, and Elta's manual also excludes corrosive atmospheres, so talk to us before using it on aggressive fumes. Elta publish airflow only up to 100 Pa for this model, so keep the duct short and simple or step up to a two pole model.Why choose this over alternativesIn the 400mm size there is also the Elta SB400-CON2-3 (2 pole three phase conical, 7495 m³/h, 70 dB(A)). As a four pole fan at 1400 rpm this one is the quieter choice at 55 dB(A) at the inlet, best on short, low resistance runs.A bifurcated fan costs more than a standard cased axial because the motor has its own tunnel and Class H insulation. If the air is clean and below +70°C, a standard cased axial fan does the job for less money; choose the Biflow when heat, grease or dust would shorten a normal motor's life. The cylindrical case has a single entry motor tunnel and is shorter than the conical model in the same size (450mm long against 650mm for the Elta SB400-CON2-3).Installation notes Mount it at any angle, adequately supported, with access for maintenance. Do not obstruct the motor tunnel, as the motor relies on ambient air through it for cooling. This cylindrical model has a single entry motor tunnel, which must face vertically upwards or horizontally to keep the motor cool. The case is 450mm long with 8 holes of 12mm on a 450mm PCD at each end, matching Elta 061B-0400 flanges. Use Elta's high temperature 063-0400-PU250 flexible connectors for hot air duties. Wire to Elta diagram 152-616. Fuses and breakers give short circuit protection only, so fit a starter with overload protection; for variable speed Elta show the fan run from an inverter. Fit a local means of isolation, check rotation and airflow direction at first start, and inspect and clean the impeller at least every 12 months. You'll also need Elta matching flanges 400mm (061B-0400, the flanges Elta list for the Biflow SB) Elta ancillary pack APK400SBCYL/002 (flexible connections, matching flanges, anti-vibration mounts and mounting feet) available to order, ask us Elta bell mouth inlet 241B-0400-BELL and impeller side guard 078C-0400-C available to order, ask us Browse more high temperature fans, commercial kitchen extract fans or Elta fans, or call us for help choosing the right fan.Specifications Model SB400-CYL4-3 Type Bifurcated cylindrical axial fan, motor out of airstream Diameter 400mm Max airflow 3636 m³/h Static pressure 100 Pa Motor Three phase AC, 380-415V 50Hz, 4 pole, 1400 rpm, IP55, Class H Power 250 W output (0.69 A peak) Noise 55 dB(A) inlet at 3m Air temperature -20°C to +200°C in the airstream Warranty 1 Year Manufacturer Starting current 3.80 A Motor ambient -20°C to +54°C, up to 95% RH Impeller Adjustable pitch aerofoil, die cast aluminium blades Casing Steel, hot dip galvanised after fabrication Case 450mm long, 400mm internal diameter, 475mm flange diameter Flange fixings 8 holes 12mm on 450mm PCD Weight 29 kg Wiring diagram 152-616 ErP Exempt Manuals & Guides Elta Bifurcated Axial Fans Catalogue