... Model :LSY 160 LSY 200/250 LSY Screw Conveyor1. The conveyor adopts high quality seamless tubes for good ... , safe and reliable, without dust leakage.2. One-process forming screw blade is welded to the central tube perfect balance. Double ... powdery materials.3. High quality reducer, heavy-duty design, great torque, low noise, no oil impregnation, long service life.4. Universal ...