HNPM mzr-7209 Ex

  • Max. Capacity 225 ml/min

  • Max. Pressure 40 bar

  • Max. Viscosity 5000 mPas

  • Temperature Range -5 to +40 °C 

HNPM mzr-7209 Ex

Atex Area Micro Annular Gear Pump HNPM mzr-7209 Ex by HNP Mikrosysteme for use in chemical and process technology at Thomson Process Equipment and Engineering.

HNPM Atex Pump Ex Series HNPM mzr-7209 Ex Micro Annular Gear Pump offers Precision Dosing, Low Pulsation Small Volume Dosage at High Pressure for broad viscosity range of liquids including watery solutions, solvents, oil and gels.

HNP Mikrosysteme micro annular gear pump HNPM mzr-7209 Ex covers the flow range 0.048 - 225 ml/min. The highly precise, low pulsation small volume dosage even of non-lubricating liquids or at high pressure, the compact design of this Ex-pump, the broad viscosity range and the small measurements are unique features of this pump series.


The HNP Mikrosysteme mzr-7209 Ex pumps are applied in the field of chemical and process technology and are suitable for both continuous delivery and discrete dosage of watery solutions, solvents, oil and other viscous liquids. Accessories extending the operating parameters of the device are available.


Advantages of the HNP Mikrosysteme Micro Annular Gear Pump Ex Series Micro Dosing Pump mzr-7209 Ex

  • Ex-certification ATEX -conform with EU Directive 2014/34/EU
  • High dosage precision -precision CV < 1 % at low volumes
  • Compact dimensions -length < 295 mm, including Ex-motor
  • Broad viscosity range - methanol, solvents, adhesives, grease, gel
  • Long service life - wear-resistant tungsten carbide
  • Low pulsation delivery, low shear stress - rotary micro annular gear technology


Technical Data of the HNPM mzr 7209 Ex Atex Pump.

Ambient temperature range

0 ... +40 °C

Flow rate

0.048 – 225 ml/min

Viscosity range

0.3 – 5,000 mPas

Precision CV

< 1 %

Velocity range

1 – 4700 rpm

Wetted parts

stainless steel 316L (1.4404, 1.4435), tungsten carbide Ni-based; shaft seal: graphite-reinforced PTFE, 316L static seals: FPM, optional: EPDM, FFPM


DC-motor, 24 V DC, 2 A, 53 W, encoder: 500 counts per turn, type HEDL 5540

Cable length

10 m


approx. 2,500 g


CE II 2G c T4 X

Place of installation

Ex area zone 1, 2

Differential pressure range

0 – 30 bar (1 mPas); 0 – 40 bar (above 16 mPas)

Maximum inlet pressure

5 bar (73 psi), (10 bar (145) *)

Operating temperature range

-5 ... +40 °C

Displacement volume

48 µl

Smallest dosage volume

30 µl


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


Accessories for the ATEX Micro Annular Gear Pump from HNP Mikrosysteme mzr-7209 Ex

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

Fluidic seal module

additional sealing system for handling liquids sensitive to air or moisture and for vacuum applications of pumps from the high performance series

Double shell heating module

double shell for active heating or cooling of pump heads from the high performance and hermetic inert series,
thermal insulation of pump head and drive,
prevents temperature drop of liquid