Union Iron Agricultural Bucket Elevator. Economical and efficient elevation of loose bulk materials. Low initial cost and minimal maintenance. Two lines of standard units include centrifugal and continuous discharge models, belt type and chain type. More. 1. Definition of bucket elevator What is a bucket elevator ? Bucket elevators are mainly used for vertical (elevation) conveying, although some manufacturers are also proposing designs allowing to cover horizontal sections.In bucket elevators, buckets, that are filled with material in order to convey it, are mounted on a belt, driven by a motor.