Micro annular gear pump mzr-7205

For industrial production and process technology

The micro annular gear pump mzr-7205 covers the flow rate range 0.048-288 ml/min. To the main assets of the device belong high precision, low pulsation, low volume dosage even of non-lubricating liquids or at high pressures, compact design and an integrated microcontroller. The pump allows dosage in a broad viscosity range and shows small, economic dimensions. The mzr-7205 targets applications in industrial production and process technology. The pump has been designed for continuous delivery and discrete dosage of water, watery solutions, solvents, methanol, oil, lubricants, adhesives, inks and paints as well as other high viscosity liquids.


  • High dosage precision
    precision CV < 1 % at low volumes
  • High differential pressures
    achievable even for low viscosity liquids
  • Compact dimensions
    length 156 mm, including controller
  • Broad viscosity range
    methanol, water, solvents, adhesives, grease, gel
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology
  • Long service life
    wear-resistant tungsten carbide
  • Precision motor and sophisticated control
    DC-servomotor with integrated microcontroller
  • Chemical processing
  • Industrial and plant engineering
  • Packaging
  • Medical and pharmaceutical industry
  • Mini plant technology
  • Spray technology
  • Dispensing of adhesives
  • Ink and paint dosage
  • Vacuum applications

Reduction gear

reduction gear unit,
reduces pump speed,
stabilizes motor speed in low RPM-range, increases drive torque

Heat insulation module

thermal insulation of pump head and drive for high performance and hermetic inert pump series,
also available in ATEX

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

Electrical heating module

additional electrical heating for pump heads from the high performance and hermetic inert series with frontal fluid connection,
thermal insulation of pump head and drive,
prevents temperature drop of liquid

Double shell heating module

double shell for active heating or cooling of pump heads from the high performance and hermetic inert series,
thermal insulation of pump head and drive,
prevents temperature drop of liquid
Flow rate 0.048 – 288 ml/min
Viscosity range 0.3 – 50,000 mPas (1,000,000 mPas *)
Precision CV < 1 % (Coefficient of variation CV)
Velocity range 1 – 6000 rpm
Fluid connection 1/8" NPT internal thread, lateral optional: 1/8" NPT internal thread, frontal
Wetted parts stainless steel 316L (1.4404, 1.4435), tungsten carbide Ni-based; shaft seal: graphite-reinforced PTFE, 316L static seals: FPM, optional: EPDM, FFPM
Motor DC-servomotor 24 V DC, 44 W
Controller integrated 16-bit microcontroller
Interface 0–10 V, RS-232, 1 digital input/output
Dimensions (L x W x H) 156 x 50 x 69 mm
Weight approx. 1080 g
Differential pressure range 0 – 40 bar (580 psi)
Maximum inlet pressure 5 bar
Operating temperature range -5 ... +60 °C (-20 ... +150 °C *)
Displacement volume 48 µl
Smallest dosage volume 30 µl
Remark * depending on accessories,
Customized solutions on request

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.

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