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Mounted on casters for better mobility in the factory, the frame of the Bulk-Out BFF Series unloader is equipped with 4 extendable uprights to adapt to big-bags from 915 to 2135 mm in height. Removable bag lifting frame with Z-Clip strap mounts allows big bags to be secured at ground level and then lifted with a forklift into receiving cups located at the top of the unloader frame. The big-bag/hopper interface is comprised of a manual Spout-Lock exit chute locking ring for high-reliability bag connections, and a pneumatically operated Tele-Tube telescopic tube, which exerts tension continues down the blocking ring and bag exit chute as the big bag empties and lengthens, promoting flow and emptying. Increased flow is provided by the Flow-Flexer bag activators which raise and lower the opposite bottom sides of the big-bag at regular intervals in a pronounced V shape, which promotes total emptying without manual intervention. The built-in hopper can be equipped with a metering device for pneumatic or tubular cable conveying lines, a loading adapter for flexible screw conveyors, or a universal flange outlet for connection to other downstream processing equipment or storage tanks. The entire unit can be moved to multiple locations within the plant, eliminating the cost of multiple stationary units and allowing for easy transportation to a cleaning station between production runs. Designed to facilitate thorough cleaning, the adjustable uprights are mounted on the outside of the frame posts instead of telescoping inside, while the stainless steel horizontal members, in round or square tubing, minimize retention of water and cleaning solutions after washing. The system is also offered in all stainless steel construction to current food, dairy, pharmaceutical and industrial standards, and in carbon steel with durable industrial coatings. The Flexicon Mobile Big Bag Unloader can be moved to many locations within the plant.