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What are the examples of where screw pumps are used?

Hydraulic and Lubrication Systems - Many lubrication systems and hydraulic systems use a screw pump. These are usually small, triple screw pumps. Lubrication and hydraulic systems like this are used for supplying lube oil to large machinery, supplying hydraulic power to high-pressure hydraulic systems or operating elevators in buildings.
Heavy Oil Pipeline - When pumping high viscosity crude oil, screw pumps can offer an ideal solution for moving it through pipelines. Able to pump higher viscosities than a centrifugal pump, and able to pump higher flows than a reciprocating pump, screw pumps are often used in these applications. In these scenarios, very large pumps are sometimes used to get to the flow rate required. These pumps are usually driven by large electric motors or diesel engines.
Multi-phase Pumping - Multi-phase pumping refers to pumping a mixture of fluid and vapor together, and is known to be one of the most challenging pumping applications. Serious damage can occur to compressors when liquid enters, just like serious damage can occur to most pumps when air enters. When built correctly, a screw pump can be a hybrid between a pump and a screw compressor, being able to handle both liquid and gas.

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