Patented MATERIAL MASTER™ Bulk Bag Discharging System provides dust-tight discharge of non-free flowing materials. Exclusive Flo-Master™ “breaker-bar” bag massaging system promotes product discharge. A powerful Flo-Lock™ actuated discharge spout closure system halts material flow for partial bag discharge. A Sure-Seal™ actuated spout clamping system seals the bag discharge spout for dust-tight operation. A fully integrated 12-inch square single rotor crusher with 20 HP drive and sizing screen returns material agglomerations back to a conveyable particle size.