Micro annular gear pump mzr-11557

For micro reaction 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 rate 29 – 1152 ml/min
Viscosity range 0.3 – 1,000 mPas
Precision CV < 1 % (Coefficient of variation CV)
Velocity range 300 - 6,000 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 partially stabilized ZrO2, optional: tungsten carbide Ni-based
Motor AC-motor, IEC-Size 056, 4 poles, IP 55, rated voltage 240/400 V, rated frequency 100 Hz, 240 W
Dimensions (L x W x H) 291 x 130 x 171 mm
Weight approx. 11 kg
Temperature protection thermal contact (NC)
Maximum system pressure 60 bar (870 psi) 200 bar * (2900 psi *)
(inlet pressure + differential pressure)
Torque transfer 6-pole NdFeB magnetic coupling
Differential pressure range 0 - 60 bar (870 psi)
Operating temperature range -5 ... +60 °C (-20 ... +100 °C *)
Displacement volume 192 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.

File Language Size
Manual mzr-11557
Manual mzr-11557 (1.6 MB)
Betriebsanleitung mzr-11557 (1.6 MB)
1.6 MB
Micro annular gear pump mzr-11557
Micro annular gear pump mzr-11557 (83 KB)
Mikrozahnringpumpe mzr-11557 (84 KB)
Micropompe gérotor mzr-11557 (86 KB)
83 KB