DPP Blog
Technical Articles
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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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Pump Cavitation and How to Avoid It
What is Cavitation? All pumps operate by creating a low pressure at the inlet and allowing atmospheric (or system) pressure to push fluid into the pump. The process makes all pumps susceptible to a phenomenon called cavitation. Cavitation is the formation of vapor cavities (bubbles) inside of a liquid when the local pressure is decreased […]
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Pump Internal Leakage
Internal leakage results from the imperfect fit between components in a pump assembly. Regardless of how well the two components conform to one another, microscopic gaps will exist, and fluids will move through them.
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Positive Displacement Pumps
Positive displacement pumps move entrapped volumes of fluid mechanically through the system. On the intake (suction) side the volume expands while on the outlet (discharge) side the volume contracts.
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