Micro annular gear pump mzr-7241

Fluid-dependent customizable dosing pump

The micro annular gear pump mzr-7241 of the modular pump series is suitable for dosing and metering in low to medium pressure and viscosity ranges. To the main assets of this series belong low pulsation , high precision low volume dosage of non-lubricating liquids, compact design with smallest dimensions and low price. These pumps are suitable for dosing and dispensing deionized water, aqueous solutions, solvents as well as low to highly viscous oils, lubricants or dyes.


  • Customized material selection
    pump components in stainless steel/tungsten carbide, aluminium/tungsten carbide or alloy C22/ceramics
  • High dosage precision
    precision CV 1 % at low volumes
  • Long service life
    wear- and corrosion-resistant materials
  • Compact dimensions
    length 128 mm
  • Dynamic smart drive and control
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology, no valves
  • Chemical processing
  • Industrial and plant engineering
  • Packaging
  • Dispensing of adhesives

Fluidic seal module

additional sealing system for handling liquids sensitive to air or moisture and for vacuum applications of pumps from the high performance series

Controller S-KB-4

for pumps with brushless DC-motor,
motor control unit for continuous dosing

Additional axial bearing support

support extends the differential pressure range up to 40 bar and the maximum inlet pressure up to 5 bar
Flow rate 9.6 – 288 ml/min
Viscosity range 0.3 – 10,000 mPas
Precision CV 1 % (Coefficient of Variation CV)
Velocity range 500 – 6000 rpm
Fluid connection 1/8" NPT internal thread, lateral optional: flanged connection with pipe socket, frontal
Wetted parts Pump case: stainless steel 316L, optional: aluminium anodized, alloy C22; rotors: tungsten carbide Ni-based, optional: ceramics; bearing: ceramics, epoxy resin; shaft seal: graphite-reinforced PTFE, stainless steel 316L; static seals: FPM, optional: EPDM, FFPM
Motor Brushless DC-motor, 17 V DC, 40 W
Dimensions (L x W x H) approx. 128 x 42 x 60 mm
Weight approx. 980 g (Aluminum version approx. 600 g)
Electrical connection 10-pole connector
Differential pressure range 0 – 5 bar (0 – 40 bar *)
Maximum inlet pressure 1 bar (5 bar *)
Operating temperature range -5 ... +60 °C
Displacement volume 48 µl
Smallest dosage volume 30 µl
Remark * with optional additional axial bearing support

Even if single parameters are within the indicated performance range of technical data, certain parameter combinations may not be achievable. Single parameters may exceed their indicated performance range under adequate circumstances. For detailed evaluation please contact HNP Mikrosysteme. Actual performance may vary.
Specifications are subject to change without notice.

File Language Size
Manual mzr-7241
Manual mzr-7241 (2.0 MB)
Betriebsanleitung mzr-7241 (2.9 MB)
2.0 MB
Micro annular gear pump mzr-7241
Micro annular gear pump mzr-7241 (109 KB)
Mikrozahnringpumpe mzr-7241 (110 KB)
Micropompe gérotor mzr-7241 (111 KB)
109 KB