Domestic Sewage Treatment Screw Conveyor Sludge Conveying Equipment. Shaftless Design: No central axis interference, preventing blockage and ensuring smooth operation for sticky materials. High Reliability: Large torque, low energy consumption, and long lifetime with high reliability and good applicability. Hygienic Operation: Totally enclosed conveying with easy cleaning spiral surface ensures materials are free from contamination. Customizable Dimensions: Conveying length and screw diameter (200-380mm) can be customized according to customer requirements. Durable Materials: Constructed with stainless steel or carbon steel, featuring anti-corrosive and wear-resisting inner layers. Low Noise & Maintenance: Closed running design reduces noise, and compact structure allows convenient installation and repair.