Positive Discharge type Chain bucket elevators.

Positive Discharge Elevators are similar to the centrifugal discharge type, except that buckets are snubbed back under head sprockets to gain a more complete discharge at a slower chain speed. The elevators usually handle light aerated, dusty and sticky materials that won't discharge cleanly from a centrifugal discharge elevator. The "A" or "B" malleable iron /steel/PVC buckets are mounted at intervals on two strands of chain. Providing a capacity equal to the centrifugal discharge type requires larger buckets or closer spacing.