HNPM mzr-11557 Ex

Max Capacity: 1152 ml/min

Max Pressure: 60 bar

Max Viscosity: 1000 mPas

Temperature Range: -5 to +60 °C 

Categories: , ,


HNP Mikrosysteme HNPM mzr-11557 Ex is an Explosion Proof Motor-driven Atex Area Micro Annular Gear Pump  of the Hermetic and Chemically inert series and a revolution in Pump Technology.

HNP Mikrosyteme High Dosing Precision, Long Life and Wear Resistant Micro Annular Gear Pump mzr-11557 Ex for low volume dosage of non-lubricating liquids of large range of viscosties, pumping water, solvents, grease, gel, adhesives and more.

HNPM mzr-11557 Ex micro annular gear pump is used in chemical processing, industrial and plant engineering, dispensing of adhesives, pharmaceutical lab processes, packaging, vacuum applications. These pumps have high chemical resistance due to ceramic rotors and other functional elements. 

The HNP Mikrosysteme mzr-11557 Ex micro annular gear pump of the hermetic and chemically inert series is universally suitable for aggressive and corrosive media, a revolution in the pump technology. 

The HNP mzr-11557 Ex is driven by a explosion-proof three-phase AC-motor the pump covers the flow range from 58 ml/min to 1152 ml/min. 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.

Advantages of the HNPM mzr-11557 Ex Micro Annular Gear Pump for Explosive or corrosive conditions.

  • Ex-certification ATEX-conform with EU directive 94/9/EEC
  • High dosage precision -precision CV < 1 % at low volumes
  • Long service life -wear-resistant tungsten carbide
  • Broad viscosity range -water, solvents, adhesives, grease, gel
  • Compact dimensions- length 358 mm
  • High differential pressures- achievable also for low viscosity liquids
  • Low pulsation delivery, low shear stress- rotary micro annular gear technology

Applications of the HNP Mikrosysteme Atex Pump mzr-11557 Ex

  • 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


Ambient temperature range

-20 … +40 °C (-55 … +60 °C *)

Flow rate

58 – 1152 ml/min (29 – 576 ml/min *)

Viscosity range

0.3 – 1,000 mPas

Precision CV

< 1 % (Coefficient of variation CV)

Velocity range

300 – 6000 rpm (150 – 3000 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


three-phase AC motor, IEC-Size 063, 2 poles, IP 55, rated voltage 240/400 V, frequency 50 Hz, 250 W

Dimensions (L x W x H)

344 x 120 x 227 mm


approx. 25 kg

Temperature protection

PTC-resistor, 6 pieces



Place of installation

Ex area zone 1, 2

Maximum system pressure

60 bar (870 psi) 200 bar * (2900 psi *)
(inlet pressure + differential pressure)

Differential pressure range

0 – 60 bar (870 psi)

Operating temperature range

-5 … +40 °C

Displacement volume

192 µl


* 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's Irish Agent Thomson Process Equipment and Engineering Ltd. Actual performance may vary.
Specifications are subject to change without notice.




Peristaltic Pump Transfers Fish Slurry – Verderflex VF80

Pumping saves time and energy in Fish Processing Plant using the Verderflex Peristaltic Hose Pump - VF80 A fish processing...

Read More

Sterilobe Series by Viking Pump Hygienic

Sterilobe Series by Viking Pump Hygienic at the National Manufacturing & Supply Chain Conference & Exhibition 2024 Innovative Solutions by...

Read More

HNPM Micro Annular Gear Pump

HNPM Micro Annular Gear Pump at the National Manufacturing & Supply Chain Conference & Exhibition 2024 Innovative Solutions by Thomson...

Read More