For microreaction technology and flow chemistry

The mzr-11557 micro annular gear pump of the hermetic and chemically inert series is, considering its almost universal suitability for aggressive and corrosive media, a revolution in the pump technology. Its rotors and functional elements being made of ceramics, the pump shows the highest chemical resistance and an outstanding resistance to wear. Thanks to the use of ceramics as bearing and shaft material, a magnetic coupling, and case components made out of alloy C22 (DIN 2.4602), this pump will take up any challenge in the chemical industry applications.


  • High resistance to corrosion
    oxidizing and reducing media, acids and bases
  • Hermetically sealed
    magnetic coupling (NdFeB)
  • Long service life
    wear-resistant ceramic components
  • Thermical heating
    optional double shell technology
  • Chemically inert pump head
    alloy C22, SSiC, Al2O3 and ZrO2-ceramics
  • High-power motor
    AC-motor for use with external frequency inverter
  • Low pulsation
    rotary micro annular gear technology, no valves


  • Flow chemistry
  • Microreaction technology
  • Mini plant technology

Flow charts

Technical data

  • Flow rate
    29 - 1152 ml/min
  • Displacement volume
    192 µl
  • Maximum system pressure
    60 bar (870 psi) (200 bar (2900 psi)*) (inlet pressure + differential pressure)
  • Differential pressure range
    0 – 60 bar
  • Liquid temperature range
    -5 ... +60 °C (-20 ... +100 °C *)
  • Viscosity range
    0.3 - 1000 mPas
  • Precision CV
    < 1% (Coefficient of variation CV)
  • Velocity range
    300 - 6000 rpm
  • Fluid connection
    3/8" NPT internal thread, lateral
  • Wetted parts
    Pump case alloy C22 (2.4602), optional: stainless steel 316L;
    seals FFKM (Kalrez® Spectrum™ 6375), optional: FPM, EPDM;
    shaft/bearing sintered silicon carbide (SSiC);
    bearing and wetted functional parts Al2O3 ceramics;
    rotors TAZ composite ceramics, optional: tungsten carbide Ni-based
  • Coupling
    6-pole NdFeB magnetic coupling
  • Motor
    AC-motor, IEC-Size 056, 4 poles, IP 55, rated voltage 240/400 V, rated frequency 100 Hz, 240 W
  • Temperature protection
    Thermal contact (NC)
  • Dimensions (L x W x H)
    291 x 130 x 171 mm
  • Weight
    approx. 11 kg
  • Remarks
    * with optional heat insulation module, Customized solutions on request.
  • Notice
    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. 
    This document is subject to change without notice.

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