Micro Annular Gear pumps

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HNP Mikrosysteme GmbH,  Micro annular gear pumps are positive displacement pumps and are provided with an external toothed internal rotor as well as with an annular toothed external rotor which bear slightly eccentric to each other. Both rotors with their cycloidal indenting are at any time interlocked and form a system of several sealed pumping chambers during rotation. As the rotors rotate around their offset axis, the pumping chambers increase on the induction side and decrease on the delivery side of the pump at the same time. A homogeneous flow rate is generated between the kidney-like in- and outlet.

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Benefit mzr®-technology

·         small dimensions

·         high precision and repeatability

·         low flow dosage in the micro liter range

·         service life and ease of maintenance

·         pulseless delivery

·         wearless operation

·         abrasion resistant due to ultra-hard materials

·         small number of parts also for moving parts

·         no valves

·         small dead volume

·         vibrationless and noiseless operation

·         self-priming

·         low shear stress in liquids

·         excellent dynamic feature

·         long time precision

·         revertible (change of flow direction)

·         middle and high pressure range

·         delivery of low and high viscous liquids

·         robust, proof principle out of hydraulics

·         wearless because of reducing gear effect

·         good NPSH-value