Customer required (2) Bulk Bag Dischargers to unload sugar and whole wheat at their Brazilian processing plant. The unloading rate requirement for the dischargers was a very low frequency rate of approx. (1) bag per hour and the materials were fairly free flowing. For this reason, the NBE Untie Box with Iris Valve and Discharge Transition was selected as the most economical solution. The equipment needed to meet ATEX Zone 22 classification within a 1.5 meter (60”) range of the bag spouting dust escape zone. The height of the upper frame permits the hoist to be located outside of the Zone 22 area which allows for the use of a general-purpose hoist.