Compact hermetic pump for continuous dosage

The micro annular gear pump mzr-7261 is suitable for handling crystallizing, oxygen or moisture sensitive liquids, because the pump has no shaft seal. This functionality is made possible thanks to a liquid-separating cup surrounding the magnetic drive. The compact dimension of this magnetic hermetic pump is achieved by a completely new product design and optimal matching with an integrated speed controller. The pump has a length of 80 mm and a weight of 390 g. The pump handles flow rates from 24 to 288 ml/min with a high precision and low pulsation. The pump is suitable for applications where an avoidance of leakage and a long service life as well as low energy consumption are important requirements. The pump is supplied with a terminal box for speed control and LED status indicator.


  • Hermetic pump design
    pump without shaft seal
  • Magnetic drive
    inner magnet system driven by rotating magnetic field
  • Integrated controller
    supply voltage 24 V DC, speed control by analog input 0 – 10 V
  • Compact dimensions
    length 80 mm
  • Long service life
    wear-resistant, ultra-hard materials


  • Fuel cells
  • Dosing of AdBlue
  • Mobile analytics
  • Biotechnology
  • Marine technology
  • Metering of liquefied gases
  • Aerospace industry

Flow charts

Technical data

  • Flow rate
    24 - 288 ml/min
  • Displacement volume
    48 µl
  • Maximum system pressure
    15 bar (218 psi) (inlet pressure + differential pressure)
  • Differential pressure range
    0 - 15 bar (218 psi)
  • Ambient temperature range
    -20 ... +65 (-4 ... +149 °F) °C
  • Liquid temperature range
    -15 ... +60 °C (+5 ... +140 °F)
  • Viscosity range
    0.3 - 500 mPas
  • Velocity range
    500 - 6,000 rpm
  • Fluid connection
    manifold assembly M4
  • Wetted parts
    stainless steel 316L, 318LN, ceramics, tungsten carbide Ni-based, epoxy resin; static seals: FPM, optional: EPDM, FFPM
  • Motor
    canned BLDC-motor, 24 V DC, 21 W
  • Controller
    integrated speed controller
  • Interface
    0–10 V
  • Electrical connection
    6-pole connector, Micro-Fit
  • Dimensions (L x W x H)
    approx. 80 x 52 x 36 mm
  • Weight
    approx. 390 g
  • Notice
    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. 
    This document is subject to change without notice.

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