... screw transmission medium disturbance is small, steady pressure pump, suction performance, and can transport viscous non-Newtonian liquids ... and solid particles containing mechanical impurities and concentrates, pump-flow performance, efficiency and cost-effective wide area. ... transmission medium temperature -10 °C ~ 80 °C (special pump up 150 °C), the highest viscosity 20000 ~ 200000MPa.s ...