MarChem | Gear Metering Pumps

Perfectly matched
to your applications

for precise metering of low to medium viscous liquids

Gear Metering Pumps | for chemical applications

MarChem Gear Metering Pumps

Precise and low pulsation metering of liquids – this is the need in many industries. For this purpose, Mahr provides gear metering pumps which stand apart due to their excellent efficiency even at low viscosity at a significant counter pressure and achieves low-shear metering of liquids.

Years of experience as well as successful completion of various projects has resulted in an evolution from a bare pump to the development of a whole metering system. By means of modern sensor technology it is also possible to continuously monitor processing values of gear metering pumps like pressure, temperature, flow rate, leakage etc. Thus, production breakdowns can be prevented. This is because monitoring process parameters is not only common, but a must in many areas.

What advantages offer Mahr gear metering pumps compared to other alternative pumps?

  • low operating and maintenance costs
  • low maintenance requirements
  • each single part can be replaced separately
  • long durability due to technically customized layout for user-specific operating data
Flow cc/rev0.01 - 3,000
Speed range U/min20 - 200
Viscosity mPas0.5 - 100,000
Operating temperatureroom temperature up to 400 °C
Pump Materialin correlation to the metered liquids a variety of specialised steels and special materials are available
DLC coatings (others on request)Diamond-Like Carbon (DLC) coating improves the wear resistancy
Medium to be pumpedall kind of liquids including corrosive and abrasive media

The pump drive connection is available in following types:

  • shaft type
  • plug type

Gear metering pump with drive unit

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

The drive units are designed according to the operating conditions.


Coating technologies take a significant key position in the development of new products. The various coating technologies enlarge the application possibilities of the base materials. Furthermore, a coating reduces friction, wear and corrosion. In principle, all 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 aggressive 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 high discharge accuracies)
  • high economic efficiency through longer endurance and improvement of technological properties
  • biocompatible, allows the use in the food industry and in the medical field


Sealing systems for the gear pumps

  • stuffing box seal optionally with barrier liquid
  • rotary shaft seal optionally with barrier liquid
  • labyrinth seal
  • mechanical seal, single, double and optionally with sealing liquid
  • magnetic coupling

ATEX Directive 2014/34/EU
A version according to the Atex directive is available for the pump as well as for the drive.

Tempering of gear pump Electrical heating, liquid heating and cooling are available.

Further features The dosing pumps can be supplied with additional equipment according to requirements:

  • speed control by inverter / servo controller
  • pressure monitoring / control
  • temperature monitoring / control
  • flow monitoring / control
  • evaluation options
  • stand-alone dosing station or dosing module prepared for integration in machine environment
  • communication to other machines or control systems

Gear Metering Pumps



Inquiry Specification
Gear Metering Pumps

Please fill out this form – with this data we will select the suitable gear pump.


Technical Information

Pump Material of Construction



Inquiry Specification
Drive Unit

Please fill out this form – with this data we will select the suitable drive for the pump.


Mahr | Note

The entire pump portfolio cannot be completely listed due to the large number of available designs. The same applies to the fields of application. Please contact us!

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Mahr Metering Systems | Contact

Do you have questions about our products?

Please contact us at +49 (0) 551-7073-100

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