http://www.nbe-inc.com/bbd Dust-free bulk bag unloading, and complete bulk bag discharge are made possible with the E3™ closed-cycle dust recovery system from National Bulk Equipment. The E3 system encloses the bulk bag spout within a sealed containment cylinder. Material dust created during bulk bag discharging is filtered, collected, and returned to the process stream. The sealed cylinder lowers to elongate the enclosed bulk bag spout; the bag forms to a conical shape providing fast and complete bulk material discharge.