Continuous pneumatic operation is simpler than mechanical operation, or less vulnerable to human operating errors. The introduction of the piping into the stockpile creates an inverted cone easily and continuously feeding the nozzle until the bottom of the truck. The equipment is generally stationary, and the suction piping is supported by a hydraulic arm which is only used for its periodical repositioning facing the truck. This procedure by itself is enough to minimize the risk of collisions and accidents. With few moving parts and motion for position only, the operation is safer both for the material and for the workers. Maintenance is measured by the number of moving parts of a system. As the propulsion system is only used to position the equipment, and suction - therefore, air - is used as its means of transportation, the number of moving parts is smaller than those found in other systems and the cost of maintenance is lower. |