High accuracy dosing: combining pumps with mass flow controllers

Demanding metering applications for liquids with different viscosities or precise batch dosing tasks need a particularly exact control of the flow rate. Since KNAUER pumps support a wide variety of communication interfaces, their pumps can be combined with a range of mass flow controllers to meet these challenging demands. KNAUER pumps can also be easily integrated into pilot plants or process environments.

The online measurement of the density and the direct feedback of the actual mass flow guarantee feeding of the highest accuracy. Mass flow coupling enable precise dosing of liquids independent of their properties.

Pump requirements

  • Low pulsation
  • High flow rate accuracy
  • Large dynamic range

Pump features

  • Compact solution for highly accurate batch dosing applications
  • Dosing accuracy is independent of liquid properties e.g. viscosity
  • Features batch control and alarm function
  • Mass and volume dosage possible

Application examples

  • Metering of diisocyanates
  • Metering of 1,4-butanediol
  • Metering of hexylene glycol

Operating parameters

Max. delivery pressure40 MPa (400 bar, 5800 psi)
Flow rate range0.01–1000 ml/min
Max. viscosity100 mPa·s
Liquid temperature range

20–60 °C (68–140 °F)

Selected KNAUER pumps to be combined with mass flow controller for high accuracy dosing

Max. flow ratePump head materialPump type




AZURA S-size

w/o pressure sensor

AZURA S-size

with pressure sensor

BlueShadow 40P

10 ml/min

stainless steel

AZURA P2.1S APG90EA

AZURA P4.1S APG20EA

BlueShadow Pump 40P APC30EA

50 ml/min

stainless steel

AZURA P2.1S APG90FA

AZURA P4.1S APG20FA

BlueShadow Pump 40P APC30FA



BlueShadow Pump 80P

100 ml/min

stainless steel

BlueShadow Pump 80P APD20KA

titanium

BlueShadow Pump 80P APD20KB

250 ml/min

stainless steel

BlueShadow Pump 80P APD20LA

titanium

BlueShadow Pump 80P APD20LC

500 ml/min

stainless steel

BlueShadow Pump 80P APD20MA

titanium

BlueShadow Pump 80P APD20MC

1000­­ ml/min

stainless steel

BlueShadow Pump 80P APD20NA

titanium

BlueShadow Pump 80P APD20NB