Continuous Ship Unloader (CSU) is a gigantic mechanism typically works at steel mills and power plants for unloading iron ore or coal from the vessel. CSU uses Unloader chain. Two lines (Left & Right) of chain having Buckets in between scoop up and transfer materials. Material of chain has to be selected depending on material to be unloaded. Key character is having Special seal to hold grease between pin and bushing. SENQCIA can offer 2 types of Unloader chain. Standard type and Maintenance free type. Standard type needs periodical lubrication. But Maintenance free type doesn't need additional lubrication after operation.