High Temperature Glycerin Transfer Single Mono Screw Pump with ... A 20 hp mono screw pump is a positive displacement pump that moves high-viscosity, difficult-to-pump fluids, such as sludge, and liquids containing solids or fibers. The 20 hp power rating indicates it is a heavy-duty industrial unit used for large volumes and demanding applications in various sectors, including wastewater treatment, paper manufacturing, food processing, and petroleum extraction. Its design ensures a continuous, smooth, and steady flow without pulsation or agitation.