This arrangement has a shaft and bearings supporting an overhung impellor. The bearings and shaft are outside of the airstream. The hub of impellor protrudes from the casing. The fan unit is mounted onto a channel frame, along with motor and slide rail unit & belt drive. The drive guard and support are neatly integrated with the fan unit and channel base. The channel base comes in 2 variants, one with outriggers and one without. Outriggers enable easy drilling of foundation holes without having to mark and then move the fan.
There is a bung welded to the drive side of the casing, maximum air temperature is 350ºC (50mm bung) – 450ºC(100mm bung). The impellor can be removed from inlet side only.The motor however needs to be protected from any heat by the customer.