When should I use conveyors at the silo roof?

When loading silos using mechanical conveying (such as a bucket elevator), chutes are often employed to direct the material from the discharge of the bucket elevator to the centre inlet of the silos. When loading a cluster of several silos, the distance from the bucket elevator to some of the silos can get quite large. Gravity flow chutes require a minimum slope to operate properly so as the horizontal distance to be traveled increases, so too does the required height of the bucket elevator. Often the costs of using a taller bucket elevator exceed the costs of installing horizontal conveyors on the silo roof to transport the material to the silos. In keeping overall heights reduced through the use of conveyors on the silo roofs, access for maintenance is improved.