| 11. | Its lubricity is poor, so positive-displacement pumps are unsuitable and centrifugal pumps have to be used.
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| 12. | "' Endless-piston principle "'is a dispensing variation of rotating positive displacement pumps.
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| 13. | Some positive displacement pumps use an expanding cavity on the suction side and a decreasing cavity on the discharge side.
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| 14. | These positive displacement pumps have an expanding cavity on the suction side and a decreasing cavity on the discharge side.
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| 15. | Many variations of the positive displacement pump have been developed, and many other pump designs rely on fundamentally different principles.
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| 16. | :Is the OP asking about the advantages of axial flow pumps over reciprocating positive displacement pumps for purposes of propulsion?
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| 17. | Momentum transfer pumps in conjunction with one or two positive displacement pumps are the most common configuration used to achieve high vacuums.
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| 18. | This is the principle behind a "'positive displacement pump "', for example the manual water pump.
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| 19. | An "'Inductive pump "'is a magnetically regulated positive displacement pump used to pump liquids and gases.
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| 20. | A "'variable displacement pump "'is a device that converts mechanical energy to hydraulic ( fluid ) energy.
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