Micro annular gear pump mzr-7259 Ex

Ex-pump for application in chemical and process technology

The micro annular gear pump mzr-7259 Ex of the hermetic inert pump series in its explosion proof version is used for highly precise, pulseless small volume dosage even of aggressive and corrosive liquids. The compact design combined with high achievable pressures are unique features. The pump is applied in the field of chemical and process technology. Thanks to the use of rotors and functional elements being made of ceramics, a magnetic coupling, and case components made out of alloy C22, this pump will take up any challenge in the chemical industry applications.


  • Ex-certification ATEX
    conform with EU Directive 2014/34/EU
  • Compact, chemically inert
    length 280 mm, alloy C22, SSiC, Al2O3 and ZrO2-ceramics
  • Long service life
    wear-resistant ceramic components
  • Hermetically sealed
    magnetic coupling (NdFeB)
  • High dosage precision
    precision CV < 1 % at low volumes
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology, no valves

Programmable controller S-HD-KL

for micro annular gear pumps mzr-xx09 Ex and mzr-xx59 Ex,
programmable controller for continuous and discrete dosing

Heat insulation module

thermal insulation of pump head and drive for high performance and hermetic inert pump series,
also available in ATEX
Ambient temperature range 0 ... +40 °C
Flow rate 0.048 – 225 ml/min
Viscosity range 0.3 – 100 mPas
Precision CV < 1 %
Velocity range 1 – 4700 rpm
Fluid connection 1/8" 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 DC-motor, 24 V DC, 2 A, 53 W, encoder: 500 counts per turn, type HEDL 5540
Cable length 10 m
Weight approx. 4900 g
Ex-certification CE II 2G IIC c T4 X
Place of installation Ex area zone 1, 2
Maximum system pressure 80 bar (1160 psi) (inlet pressure + differential pressure)
Operating temperature range -5 ... +60 °C (-20 ... +120 °C *)
Displacement volume 48 µl
Smallest dosage volume 30 µl
Remark * with optional heat insulation module,
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
Faulhaber Motion Manager
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Faulhaber Motion Manager (13.0 MB)
13.0 MB
Manual mzr-7259 Ex
Manual mzr-7259 Ex (1.7 MB)
Betriebsanleitung mzr-7259 Ex (1.8 MB)
1.7 MB
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Micro annular gear pump mzr-7259 Ex (90 KB)
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90 KB