For microreaction technology and flow chemistry

The mzr-11558 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 tungsten carbide
  • Chemically inert pump head
    alloy C22, SSiC, Al2O3 and ZrO2-ceramics
  • Dynamic precision motor
    brushless DC-motor with encoder
  • High differential pressures
    achievable even for low viscosity liquids
  • Precise dosage, low pulsation
    rotary micro annular gear technology, no valves

Flow charts

Technical data

  • Flow rate
    0.192 - 1152 ml/min
  • Smallest dosage volume
    100 µl
  • 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 - 1,000 mPas
  • Precision CV
    < 1% (Coefficient of variation CV)
  • Velocity range
    1 - 6000 rpm
  • Fluid connection
    3/8" NPT internal thread, lateral
  • Wetted parts
    Pump case alloy C22 (2.4602), optional: stainless steel 316L;
    seals FFPM (Kalrez® Spectrum™ 6375), optional: FPM, EPDM;
    shaft sintered silicon carbide (SSiC);
    bearing and wetted functional parts Al2O3 ceramics;
    rotors TAZ composite ceramics, optional: tungsten carbide Ni-based
  • Motor
    Brushless DC-motor, IP 54, 42 V DC, max. 368 W
  • Encoder
    500 counts per turn, type HEDL 5640
  • Electrical connection
    motor cable length 3 m, 6-pole plug for motor winding, 12-pole plug for encoder and hall sensors
  • Dimensions (L x W x H)
    301 x 130 x 129 mm
  • Weight
    approx. 11000 g
  • 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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