Elta SB250-CON4-1 Biflow Bifurcated Conical Axial Fan Single Phase AC - 250mm
Elta SB250-CON4-1 Biflow Bifurcated Conical Axial Fan Single Phase AC - 250mm
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Product Details
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Specifications
Product specifications
| Model | SB250-CON4-1 |
| Type | Bifurcated conical axial fan, motor out of airstream |
| Diameter | 250mm |
| Max airflow | 1008 m³/h |
| Static pressure | 75 Pa |
| Motor | Single phase AC, 220-240V 50Hz, 4 pole, 1450 rpm, IP55, Class H |
| Power | 120 W output (1.13 A peak) |
| Noise | 48 dB(A) inlet at 3m |
| Air temperature | -20°C to +200°C in the airstream |
| Warranty | 1 Year Manufacturer |
Summary
See more specification See less specification
The Elta SB250-CON4-1 is a 250mm Biflow SB bifurcated conical 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 1008 m³/h in free air, and Elta's published table for this model runs out at 75 Pa, where airflow has fallen to 104 m³/h.
A 4 pole single phase AC motor (220-240V 50Hz) runs at 1450 rpm with a 120 W output and 1.13 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.
- 1 Phase
- AC Motor
- Up to 1008 m³/h
- Fixed Speed
What it is best used for
Hot or contaminated extract on 250mm duct where a standard axial would cook its motor: a small commercial kitchen canopy, a boiler house, a spray booth or a process area with a short duct run. At 50 Pa it moves 540 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 75 Pa for this model, so keep the duct short and simple or step up to a two pole model. This single phase version is fixed speed.
Why choose this over alternatives
In the 250mm size there is also the Elta SB250-CON2-3 (2 pole three phase conical, 2038 m³/h, 61 dB(A)) and the Elta SB250-CON4-3 (4 pole three phase conical, 972 m³/h, 48 dB(A)). This is the single phase option for sites without a three phase supply; the four pole motor keeps it quiet at 48 dB(A) at the inlet.
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.
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.
- The case is 460mm long with 8 holes of 10mm on a 299mm PCD at each end, matching Elta 061B-0250 flanges. Use Elta's high temperature 063-0250-PU250 flexible connectors for hot air duties.
- Wire to Elta diagram 152-521 (fixed speed, capacitor run). Fuses and breakers give short circuit protection only, so fit a starter with overload protection.
- 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 250mm (061B-0250, the flanges Elta list for the Biflow SB)
- Elta ancillary pack APK250SBCON/002 (flexible connections, matching flanges, anti-vibration mounts and mounting feet) available to order, ask us
- Elta bell mouth inlet 241B-0250 and impeller side guard 078C-0250-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 | SB250-CON4-1 |
| Type | Bifurcated conical axial fan, motor out of airstream |
| Diameter | 250mm |
| Max airflow | 1008 m³/h |
| Static pressure | 75 Pa |
| Motor | Single phase AC, 220-240V 50Hz, 4 pole, 1450 rpm, IP55, Class H |
| Power | 120 W output (1.13 A peak) |
| Noise | 48 dB(A) inlet at 3m |
| Air temperature | -20°C to +200°C in the airstream |
| Warranty | 1 Year Manufacturer |
| 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 | 460mm long, 250mm internal diameter, 325mm flange diameter |
| Flange fixings | 8 holes 10mm on 299mm PCD |
| Weight | 23 kg |
| Wiring diagram | 152-521 |
| ErP | Exempt |
Manuals & Guides
Product Description
The Elta SB250-CON4-1 is a 250mm Biflow SB bifurcated conical 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 1008 m³/h in free air, and Elta's published table for this model runs out at 75 Pa, where airflow has fallen to 104 m³/h.
A 4 pole single phase AC motor (220-240V 50Hz) runs at 1450 rpm with a 120 W output and 1.13 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.
- 1 Phase
- AC Motor
- Up to 1008 m³/h
- Fixed Speed
What it is best used for
Hot or contaminated extract on 250mm duct where a standard axial would cook its motor: a small commercial kitchen canopy, a boiler house, a spray booth or a process area with a short duct run. At 50 Pa it moves 540 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 75 Pa for this model, so keep the duct short and simple or step up to a two pole model. This single phase version is fixed speed.
Why choose this over alternatives
In the 250mm size there is also the Elta SB250-CON2-3 (2 pole three phase conical, 2038 m³/h, 61 dB(A)) and the Elta SB250-CON4-3 (4 pole three phase conical, 972 m³/h, 48 dB(A)). This is the single phase option for sites without a three phase supply; the four pole motor keeps it quiet at 48 dB(A) at the inlet.
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.
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.
- The case is 460mm long with 8 holes of 10mm on a 299mm PCD at each end, matching Elta 061B-0250 flanges. Use Elta's high temperature 063-0250-PU250 flexible connectors for hot air duties.
- Wire to Elta diagram 152-521 (fixed speed, capacitor run). Fuses and breakers give short circuit protection only, so fit a starter with overload protection.
- 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 250mm (061B-0250, the flanges Elta list for the Biflow SB)
- Elta ancillary pack APK250SBCON/002 (flexible connections, matching flanges, anti-vibration mounts and mounting feet) available to order, ask us
- Elta bell mouth inlet 241B-0250 and impeller side guard 078C-0250-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 | SB250-CON4-1 |
| Type | Bifurcated conical axial fan, motor out of airstream |
| Diameter | 250mm |
| Max airflow | 1008 m³/h |
| Static pressure | 75 Pa |
| Motor | Single phase AC, 220-240V 50Hz, 4 pole, 1450 rpm, IP55, Class H |
| Power | 120 W output (1.13 A peak) |
| Noise | 48 dB(A) inlet at 3m |
| Air temperature | -20°C to +200°C in the airstream |
| Warranty | 1 Year Manufacturer |
| 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 | 460mm long, 250mm internal diameter, 325mm flange diameter |
| Flange fixings | 8 holes 10mm on 299mm PCD |
| Weight | 23 kg |
| Wiring diagram | 152-521 |
| ErP | Exempt |
Manuals & Guides
Delivery & Returns
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How much air does the Elta SB250-CON4-1 move?
Up to 1008 m³/h in free air and 104 m³/h at 75 Pa.
What temperature air can it handle?
Up to +200°C in the airstream, because the motor sits in its own tunnel outside the airflow. The motor itself needs ambient air between -20°C and +54°C.
Is it suitable for commercial kitchen extract?
Yes. Elta list kitchen extract as a typical application, and keeping the motor out of the greasy airstream is the main reason to choose a bifurcated fan. Clean the impeller regularly as part of the kitchen's duct cleaning regime.
Can I control the speed?
No. This single phase version is wired fixed speed with a run capacitor (diagram 152-521). For speed control choose a three phase Biflow SB and run it from an inverter.
Can it be mounted outside or vertically?
Yes. The galvanised casing is suitable for external mounting as standard and the fan can be mounted at any angle, as long as the motor tunnel is not obstructed.
What duct size does it fit?
250mm. The case has a 250mm internal diameter with 8 flange holes of 10mm on a 299mm PCD, and Elta's 061B-0250 matching flanges fit it.