Obile Conveyor Belt For Rock Description. Portable Belt Conveyor Systems. Mini Conveyors. We manufacture the portable belt conveyors in different voltage options, including 120 Volt, 220/240 Volt or 480 Volt 3 Phase motors. These portable conveyor belt systems are the ideal choice for moving loose materials, debris, rock, dirt, cement and more. Miniconveyor and MiniveyorUSA portable belt ...