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BDB Twin Fan
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BDB series are also available in twin fan version with two double inlet fans mounted on the same shaft. To select for win fans, use the curves of single fan with the following factors:
- Volume x 2
- Absorbed Power x 2.15
- Speed x 1.05
- Noise + 3 dB
This series is available in type S2, C2 or T2
Performances of Twin fans are not AMCA licensed
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Type S2 |
Type C2 |
Type T2 |
Size: 315 to 500 Volume: 5000 to 50 000m³/h
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Size: 315 to 500 Volume: 5000 to 50 000m³/h
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Size: 355 to 630 Volume: 10 000 to 80 000m³/h
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Motor Position
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The position of the motor for belt drive centrifugal fan is in accordance with AMCA standard 99-2407-66.
Location of motor is determined by facing the drive side of fan and designating the positions by letters W, X, Y or Z.
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Motor Selection
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The power curve shown on each performance curve represents the absorbed power at the shaft of the fan measured in kW. To determine the power of the motor to be installed, a correction factors should be applied to compensate for transmission losses. For conversion to horsepower (HP), use multiplying factor 1.34.
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Inlet Vane Control
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The inlet vane control enable energy saving that varies according to the vane control compared to traditional methods of volume control.
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The inlet vane control enable energy saving that varies according to the vane control compared to traditional methods of volume control
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Volume reduction corresponding to the vane position:
- with vane fully open (Pos 90º) the volume will be 3% less than the catalogue performance
- with vane fully closed (Pos 0º) the volume will be reduced by 75%.
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IVC orientation and accessories
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The standard orientation and level position for the IVC is indicated below. When ordering a complete fan with IVC and accessories, please specify as follows:
Fan orientation e.g. CCW 270 IVC lever position e.g. Pos. 45º Example: Fan Model - CCW 270/P45
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Bearings
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The bearings are lubricated for life and maintenance-free. If re-lubrication is necessary, it is recommended to use a lithium base grease suitable for all temperatures within the operational limits. Bearings used are either deep groove ball bearing type with an adaptor sleeve or spherical roller bearings type sealed at both sides for different duty appllcation classified as below: |
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Inspection doors
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The inspection door can be supplied upon request in one of three positions: P3, P4, P5 |
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Auto Cad
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BDB 200 |
BDB 225 |
BDB 250 |
BDB 280 |
BDB 315 |
BDB 355 |
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BDB 400 |
BDB 450 |
BDB 500 |
BDB 560 |
BDB 630 |
BDB 710 |
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BDB 800 |
BDB 900 |
BDB 1000 |
BDB 1120 |
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PDF
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Features |
Example Selection |
BDB 200 - 355 |
BDB 400- 630 |
BDB 710- 1120 |
Dimensions |
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