Metering Systems
Metering Systems
Gear Metering Pumps with Inline Mounting - Dosimar

The Dosimar range was originally designed for using in metering units for various media.
The connection with lateral drilling for the product is integrated into the pump. The in-line design allows the direct passage of fluid through the pump. The so-called connection strip allows easy mounting of the pump in the machine.
This pump series is in addition to the use in metering of polyurethane components (isocyanates and polyols), various resins and other liquids also used in the production of various fibers such as aramid and PAN fibers.

The product range for gear pumps can not be completey described due to the huge diversity of designs, as well as the application fields. Please contact us in case of requirement. We are pleased to provide detailed consultation and optimal solutions for you.

  • Technical Data
  • Material
  • Drive Options
  • Options


dimensions mm 55x67,5 75x102 96x125 100x152 245x260 Ø 79
flow cc/rev 0,02-3 0,08-6 6-50 70-100 150-200 0,08-6
counter pressure bar (max) 30 100 100 100 100 100
Material Field of application Admissible operating
temperature max. °C
Admissible cleaning temperature
max. °C

highly tungsten-, vanadium and
chromium alloyed high speed stee

  • extremely high wear-resistance
  • exclusively produced for Mahr
450 550

high chromium alloyed stainless steel, additions of molybdenum and vanadium

  • optimal combination of resistance to wear and corrosion
  • for use with chemically aggressive media
180 200

These materials are used in combination.

high chromium alloyed stainless
steel, additions of molybdenum and vanadium

Stellite S2
cobalt-based alloy with high chromium content and additions of tungsten and nickel

  • very good resistance and good polishability
  • suitable for food and pharmaceutical industries

  • highly wear resistant
  • corrosion resistant











high chromium alloyed stainless
steel, additions of nickel, molybdenum and

  • high degree of hardness with excellent corrosion resistance
  • for highly stressed components











Coating technologies take a significant key position in the development of new products. The various coating technologies enlarge the application possibilities of the used base materials. Furthermore, a coating reduces friction, wear and corrosion. In principle, all the named materials can be coated depending on the specification.


Diamond-Like Carbon (DLC) improves the properties:

  • high surface hardness
  • high wear protection
  • smaller coefficient of friction
  • better corrosion reduction to agressive media
  • higher chemical resistance / stability
  • non-stick effect (reduced adhesion of polymers and other materials)
  • high temperature firmness to 250°C
  • excellent accuracy to size (no change of the Mahr / Feinpruef specific high discharge accurancies)
  • high economic efficiency through longer endurance and improvement of the technological properties

DLC- coatings are biocompatible and facilitate also the use in the food industry and in the medical field.

    The pump drive connection is available in following types:

    • plug type


    Gear pump with motor

    • Base plate
      • with mounting block
    • Coupling
      • curved tooth coupling
      • all-steel coupling
      • magnetic coupling
    • Motor
      • asynchronous gear motor
      • servomotor / servo gear motor
      • synchronous gear motor

    The drive units are designed according to the operating conditions.

    Sealing systems for the gear pumps

    • stuffing box seal
    • rotary shaft seal
    • labyrinth sealing
    • mechanical seal
    • magnetic coupling

    Atex Directive II2Gc

    A version according to ATEX directive is available for the pump, as well as for the drive.

    Heating or  cooling for the gear pumps

    Heating or cooling can be provided electrically, as well as by the thermal fluid.