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　　The LS type screw conveyor,a manufacturer of shaftless screw conveyors in Heilongjiang,has requirements for conveying materials such as powder,granular,and small block materials,such as cement,coal powder,grain,fertilizer,ash,sand,etc.The material temperature should not exceed 200℃.The screw conveyor should not transport materials that are prone to deterioration,high viscosity,or clumping.Because these materials will adhere to a spiral during transportation and rotate without moving forward,or form material blockages at the suspension bearings,causing the screw machine to malfunction.The working environment of the screw machine should be between-20℃and 50℃,allowing for slight tilting and a maximum tilt angle of 20℃.