A screw pump is a type of positive displacement pump that uses one or more rotating helical screws (rotors) to move fluids or semi-solids along the screw axis. These pumps trap fluid between the screw threads and the pump casing, creating a sealed cavity that progresses from the suction side to the discharge side, resulting in smooth, continuous flow with minimal pulsation.
Fluid Entrapment – As the screw(s) rotate, fluid is drawn into the pump at the suction end.
Axial Displacement – The fluid gets trapped in the cavities formed by the screw threads and casing.
Continuous Flow – The rotation pushes the fluid axially toward the discharge end without turbulence.
Discharge – The fluid exits at a consistent pressure with low vibration.
✔ Smooth, non-pulsating flow – Ideal for sensitive processes.
✔ Self-priming – Can handle gases and liquids (useful in multiphase flow).
✔ Handles viscous, abrasive, and shear-sensitive fluids – Works well with oils, sludge, polymers, and food products.
✔ High efficiency at high pressures – Common in hydraulic and fuel injection systems.
✔ Low internal slippage – Maintains flow even at varying pressures.
Oil & Gas – Crude oil transfer, fuel injection, lubrication.
Marine – Ballast, cargo, and fuel transfer.
Wastewater Treatment – Sludge and sewage handling.
Food & Beverage – Pumping syrups, chocolate, and pastes.
Chemical Processing – Handling solvents, adhesives, and polymers.
More efficient than centrifugal pumps for high-viscosity fluids.
Less pulsation than piston or gear pumps.
Can handle mixtures of liquids, gases, and solids (multiphase flow).
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