This arrangement is very popular for most applications due to the flexibility and the versatility of discharge positions at time of manufacture. Overhung wheel on shaft-and bearing assembly isolates fan bearings from airstream. Normally this arrangement is used for V-belt-drive fans which provides flexibility in fan performance. Motor mounts independently from fan. See Motor Positions Diagram.
Wheel supported between bearings is compact and suitable for clean, dry-air service. Arr. 3 fans are usually sold for V-belt drive fan applications.
Wheel mounted directly on motor shaft to provide the most compact design. Elimination of shaft and bearings for minimum maintenance.
Wheel supported between bearings is compact and suitable for clean, dry-air service. Arr. 7 fans are usually sold for coupling drive fan applications.
Integral pedestal furnished for the motor and coupling. Most flexible of the direct drive arrangements allowing for larger motors, fan sizes and accessories.
An adjustable motor mount featured on this arrangement provides a compact grouping of motor, drive belt and fan. The v-belt drive permits a wide variety of fan speeds. Similar to Arrangement 1, but with motor mounted on side of fan pedestal reducing overall size and field-installation costs.
Compact, packaged design with motor mounted within the fan pedestal. Minimum field installation labor required.