HNPM mzr-2509 Ex

Max Capacity: 7 ml/min

Max Pressure: 5 bar

Max Viscosity: 5000 mPas

Temperature Range: -5 to +40 °C 

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Atex Area Micro Annular Gear Pump HNPM mzr-2509 Ex by HNP Mikrosysteme for use in chemical and process technology.

HNPM Atex Pump Ex Series mzr-2509 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 mzr-2509 Ex covers the flow range 0.0015 – 7 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 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 mzr-2509 Ex series pump.

  • 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

Ambient temperature range 0 … +40 °C
Flow rate 0.0015 – 7 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
Motor DC-motor, 24 V DC, 2 A, 53 W, encoder: 500 counts per turn, type HEDL 5540
Cable length 10 m
Weight approx. 2,500 g
Ex-certification CE II 2G c T5 X
Place of installation Ex area zone 1, 2
Differential pressure range 0 – 5 bar (73 psi)
Maximum inlet pressure 5 bar (73 psi), (10 bar (145) *)
Operating temperature range -5 … +40 °C
Displacement volume 1.5 µl
Smallest dosage volume 0.25 µl
Remark * 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. Actual performance may vary.
Specifications are subject to change without notice.



Accessories for the ATEX Micro Annular Gear Pump from HNP Mikrosysteme mzr-2509 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


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