What is a positive displacement pump?

Positive displacement pumps delivers a certain amount of fluid every revolution/stroke. Fluid will not slip due to very less clearances between suction and discharge parts.

Most common type of positive displacement pumps are:

• rotary lobe pump

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• progressing cavity pump

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• rotary gear pump

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• piston pump

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• diaphragm pump

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• screw pump

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• gear pump

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• vane pump

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• regenerative (peripheral) pump

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• peristaltic pump

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