Our experience in En-Masse conveying principles is applied to our complete line of stationary and mobile marine leg unloaders. CDM Marine Leg Unloaders are used throughout the world for safe, effective and reliable port and river bulk unloading. Our complete line of mechanical marine leg unloaders are engineered to meet your specific needs and offer the same durability as our Drag Chain Conveyors. Offered in stationary or mobile design, the single-leg capacities in mobile units range from 150 to 700 TPH with stationary unloaders reaching 1500 TPH.
CDM En-Masse Marine Legs offer the flexibility of bulk material un-loading in a vertical or inclined configuration. Conventional Belt/Bucket Unloaders operate best in a vertical position since misalignment or lateral movement will cause the buckets to spill thereby losing average hourly rates. Lateral misalignment can also cause belt tracking problems that will initiate premature wear. In severe cases, this wear friction can result in high temperature generation within the leg that can be an ignition source and can cause fire. The CDM En-Masse Marine Legs are designed with a positive sprocket engagement along with a single worm gear jack for periodic chain tension. This engineered design makes the CDM En-Masse Marine Leg safe and reliable for marine bulk unloading applications.
The En-Masse operating concept affords low energy consumption at 90–95% fill efficiency. This efficiency is derived from a continuous column of conveying media, resulting in a smaller piece of equipment capable of handling larger hourly rates. The high operating efficiency also offers lower operating speeds and equivalent capacities when compared to belt/bucket style legs.
Using a Mobile Marine Leg Unloader offers many benefits over the traditional stationary version. Mobile unloaders require less capital investment because there is no dock or auxiliary structural tower required. Mobile units also generally cost less than stationary unloaders, sometimes as much as 4x less in up-front purchase costs of stationary units with comparable capacities. In addition, CDM Mobile Marine Leg Unloaders offer the flexibility of site relocation and the efficiency of placement within the vessel; providing more even draft displacement and minimizing vessel shifting. Mobile Marine Leg Unloaders can be used as needed and easily transported to another location. Using the same reliable En-Masse principles as the CDM conveyors, the Mobile Marine Legs can handle a wide range of bulk material in challenging operating environments while maintaining reliable operation with minimal maintenance.