Screw conveyors are widely used in areas such as wastewater treatment and industrial production. LSS series screw conveyors are designed to be shaftless. The U-shaped conveying trough is enclosed with its top cover can be opened. Therefore, it is especially suitable for conveying pollutant, odorous, dangerous, bridging as well as cleaning materials. LSS series shaftless conveyors convey materials through a strong rotating steel helix. It can effectively convey dry, wet, sticky, powdery and rough materials. The design of LSS series shaftless screw can effectively prevent congestion and twisting. The design of LSS series shaftless screw can effectively prevent congestion and twisting.