Hapman’s fully-enclosed tubular drag conveyor is uniquely designed for challenging bulk material handling applications. The chain-driven flight mechanism is operated by the exclusive Hapman auto-tensioner. The Hapman patented auto-tensioner, take-up assembly offers consistent and proper chain tension, which greatly reduces routine maintenance and increases chain life. The unit also automatically sends alerts when adjustments are needed. In addition the Hapman Tubular Drag Conveyor provides a proven method to gently convey friable and blended materials and offers dust-free operation that mitigates hazardous work areas.