DPP Blog
Technical Articles
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Effects of Viscosity on Positive Displacement Pumps
Positive displacement pumps move fixed volumes of fluid mechanically through a system. Therefore, one might conclude that fluid viscosity has little effect on the output of the pump. This, however, is a misconception and can lead to severe issues in a hydraulic system unless the effects of viscosity are well understood, and the system designer properly communicates the information to the pump engineers.
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Fine Abrasive Fluids in Positive Displacement Pumps
What is a Fine Abrasive Fluid? An abrasive fluid is one that causes increased wear to the fluidic system by eroding surfaces through physical interaction. Erosion can occur from simple flow across a surface or by the abrasive particles interfering with internal component interactions within a pump. The types of particles can be large contaminants […]
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Magnetically Coupled Gear Pumps
What Is a Magnetically Coupled Gear Pump? Traditional external gear pumps utilize a motor shaft which is directly coupled to a driving gear within the pump. To make this coupling, the shaft must pass through a sliding seal. The typical life-limiting component in a direct drive pump is the seal. Regardless of seal type and […]
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Gear Pumps for the Perfect Coffee Machine Foam
At the end of 2008, developers with Franke Coffee Systems began a project designed to fabricate cold milk foam. It quickly became clear that a gear pump with excellent performance capabilities was required for this.
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External Gear Pumps
External gear pumps are a type of rotary positive displacement pump tracing back to the late sixteenth century. They were often driven by water wheels as they can utilize simple rotation of gears to transfer fluids.
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