plunger pump

mechanics

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Last updated

July 1, 2026

Quick Summary

A plunger pump is a type of force pump. Force pumps are devices that use energy to move, transport, or compress fluids.1

Plunger pumps fall under the category of positive displacement pumps, which move a specific volume of fluid with each operational cycle. In a plunger pump, a plunger moves back and forth within a cylinder. As the plunger retracts, it creates a partial vacuum, drawing fluid into the cylinder through an inlet valve. On its forward stroke, the plunger pushes the fluid out through an outlet valve. These pumps are known for their reliability and durability.1

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pump
Positive displacement pumps.
The plunger pump is the oldest type in common use. Piston and plunger pumps consist of a cylinder in which a piston or plunger moves back and forth. In plunger pumps the plunger moves through a stationary packed seal and is pushed into the fluid, while…
Read More
The plunger pump is the oldest type in common use. Piston and plunger pumps consist of a cylinder in which a piston or plunger moves back and forth. In plunger pumps the plunger moves through a stationary packed seal and is pushed into the fluid, while…
Read More