A new Flexicon Mobile Sanitary Bulk Bag Discharger with stainless steel material contact surfaces allows discharging of contamination-sensitive bulk solid materials to downstream processes, dust-free. Mounted on casters for in-plant mobility, the BULK-OUT BFF Series discharger frame features four adjustable extension posts to accommodate bulk bags 36 in. to 84 in. (914 to 2134 mm) tall. The removable bag-lifting frame with Z-CLIP™ strap holders allows bulk bags to be attached at ground level, then forklifted into receiving cups atop the discharger frame. The bulk bag/hopper interface is comprised of a manual SPOUT-LOCK clamp ring for high-integrity bag spout connections, and a pneumatically actuated TELE-TUBE telescoping tube that exerts continuous downward tension on the clamp ring and bag spout as the bag empties and elongates, promoting flow and evacuation. Additional flow is afforded by FLOW-FLEXER bag activators that raise and lower opposite bottom sides of the bag at timed intervals into a steep “V” shape, promoting total discharge with no manual intervention. The integral hopper can be equipped with a metering device for pneumatic or tubular cable conveying lines, a charging adapter for flexible screw conveyors, or a universal flanged outlet for connection to other downstream process equipment or storage vessels.