How does a single screw pump work?

Apr 15, 2026

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A single-screw pump is like a gentle liquid conveyor belt, its core being the perfect pair: The rotor and stator. The rotor, like a tightly wound spring, rotates within a spiral channel formed by the rubber stator, propelling the liquid forward by one screw pitch with each revolution. This design allows even viscous liquids to move smoothly, like slowly screwing a screwdriver into butter.

 

The liquid journey is completed in three steps:

Capture Stage: Negative pressure is created at the inlet, drawing the liquid into the spiral-sealed chamber.

 

Escort Stage: The rotating rotor propels the liquid steadily along the axial direction.

 

Release Stage: Continuous spiral motion smoothly pushes the liquid out of the outlet.

 

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This pump is particularly suitable for handling sensitive fluids:

 

It won't damage the original structure of the liquid, like drinking bubble tea with a straw without breaking the tapioca pearls.

 

Stable flow with minimal pulsation, comparable to a high-speed train traveling at a constant speed.

 

Strong self-priming capability, it can run dry for tens of seconds without issue.

 

It can handle mixtures containing solid particles, similar to how the blades in a blender don't contact the cup wall.

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