Compact hermetic pump for discrete dosage

The micro annular gear pump mzr-7265 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 and position controller. The pump has a length of 84 mm and a weight of 580 g. The pump handles flow rates from 0,048 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 motion controller
    programmable motion controller for speed and position control with RS-232 interface
  • Compact dimensions
    length 84 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
  • Filling electrolytes into battery cells

Flow charts

Technical data

  • Flow rate
    0.048 - 288 ml/min
  • Smallest dosage volume
    30 µl
  • Displacement volume
    48 µl
  • Maximum system pressure
    30 bar (435 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
    1 - 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 16-bit microcontroller
  • Interface
    0–10 V, RS-232, 1 digital input/output, CANopen*
  • Electrical connection
    8-pole connector, Wago, cable length 1 m
  • Dimensions (L x W x H)
    approx. 84 x 52 x 40 mm
  • Weight
    approx. 580 g
  • Remarks
    * Customized solution on request.
  • 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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