SDA250 4 1AC Raptor Case Mounted Axial Fan Single Phase AC 250mm

The Elta SDA250/4-1AC is a 250mm Raptor SDA short cased axial fan for fitting in 250mm ductwork. It moves up to 936 m³/h in free air and 767 m³/h at 25 Pa, the highest pressure Elta publish for it, so it suits very short, low resistance duct runs.A 4 pole single phase AC external rotor motor (220-240V 50Hz) runs at 1374 rpm and draws 46 W at best efficiency (0.24 A peak). It is insulated to Class F with integral thermal overload protection and suits speed control. The Ziehl-Abegg FE2owlet aerofoil impeller has serrated trailing edges and winglets for lower noise, the mild steel case is powder coated in RAL 7045 with an IP55 terminal box, the motor is IP44, and Elta give a 12 month warranty. 1 Phase AC Motor Up to 936 m³/h Speed Controllable What it is best used forSmall ducted extract on 250mm duct: a kitchenette, changing room, cleaner's store, small shop or plant room where the duct run is short and straight. At 25 Pa it moves 767 m³/h, roughly 6 air changes an hour in a space of about 130 m³.Its published curve stops at 25 Pa, so it is the wrong fan for long duct runs, filters, heater batteries or attenuators; for those a centrifugal box fan or an inline mixed flow fan holds its airflow far better. It is not suitable for corrosive or explosive atmospheres, and the air must stay between -20°C and +70°C.Why choose this over alternativesThis is the only Raptor SDA model we list in the 250mm case. This 4 pole single phase version runs from a standard 230V supply at 1374 rpm.If you need more air, the Elta SDA315/4-1AC moves 2185 m³/h in free air. If the fan will sit in a wall or panel rather than in a duct, the Elta SPA250/4-1AC plate fan uses the same Raptor impeller and motor family on a square mounting plate.Installation notes Fit it in the duct run at any angle, securely supported, with access for maintenance. The case is 180mm long with 8 holes of 7mm on a 286mm PCD at each end for Elta matching flanges 061A-0250-C, and mounting feet 060A-0250-C are available. Wire to Elta diagram 152-177 through the fitted IP55 terminal box (21mm cable entry). The motor has an auto reset thermal cut-out, so it may restart on its own once cooled; isolate it before maintenance. For speed control Elta list the 149-EL31 or 149-TC12 for this model; check the controller amp rating against the 0.24 A peak current. Fit a local means of isolation, and site the discharge so exhaust cannot be drawn back into a room through the open flue of a gas or fuel burning appliance. At first start check rotation, airflow direction and that the running current is within the rating plate. Inspect and clean the blades and guards at least every 12 months. You'll also need Elta 149-EL31 3 amp electronic speed controller (listed by Elta for this fan) Elta 149-TC12 five step transformer controller available to order, ask us Elta ancillary pack APK250SCD/001 (flexible connections, matching flanges, anti-vibration mounts and mounting feet) available to order, ask us Browse more cased axial fans, axial fans or Elta fans, or call us for help choosing the right fan.Specifications Model SDA250/4-1AC Type Cased axial fan, short case Diameter 250mm Max airflow 936 m³/h Static pressure 25 Pa Motor Single phase AC, 220-240V 50Hz, 4 pole, 1374 rpm Power 46 W (0.24 A peak) Noise 39 dB(A) inlet, 40 dB(A) outlet at 3m IP rating IP44 motor, IP55 terminal box Warranty 1 Year Manufacturer FMEG Below 125W, outside ErP 327/2011 limits Case 180mm long, 257mm internal diameter, 306mm flange diameter Flange fixings 8 holes 7mm on 286mm PCD Impeller Ziehl-Abegg FE2owlet aerofoil with serrated trailing edges Finish Powder coated mild steel, RAL 7045 Operating temperature -20°C to +70°C, up to 95% RH Weight 5 kg Wiring diagram 152-177 Manuals & Guides Elta Raptor SDA Datasheet Elta Raptor SDA Installation Manual