What is Screw Pump & How Does it Works? A Screw Pump is a positive displacement pump that uses one or more screws to carry fluid solids or liquids along the axis of the screw(s). A screw pump can provide high flow rates even for viscous liquids, which makes them ideal for fuel transfer, elevators, and similar industrial uses. Pumps with a single screw, or Archimedean screw pump, are...