Static and Dynamic Mixing

Selecting the most suitable type of mixer is not as simple as it sounds. Key criteria include the properties of the liquids to be mixed – such as viscosity and material density – and factors like the desired mixing quality and installation length, as well as operating pressures, flow rates and the retention time of reactive substances in the mixer.

Based on the fundamental operating principle, mixers are grouped in static and dynamic ones.

Static mixers (dispersers)

In static mixing, liquid materials are simply blended using the flow current. The liquids, in the desired ratio, are pressed into a tube – the mixer channel – with flow control elements mounted end-to-end on the inside (“static mixer elements” or “the mixer bore”).

These elements – usually arranged helically, as lamellar fins/plates or as a grid –  break up the substances that are pumped in, agitate the currents and bring them back together. This results in at least four layers after the first element, eight after the second, then 16 and so on. Each subsequent mixing element thus improves the mixing result.

Static mixers are inexpensive and low-maintenance, in the disposable plastic version even maintenance-free.

Dynamic Mixers

In dynamic mixing, the components are fed into a mixing chamber and blended by a rotating mixer. Dispersive and distributive mixing is achieved using shear and elongation blades.

The great benefit of this technology is that the mixer speed – and thus the mixing intensity – is controlled electronically, allowing for optimal, very homogeneous results even with sensitive substances.

Our product range includes mixing heads for dynamic mixers of different sizes. The advantages in brief:

  • Optimal homogeneous mixing
  • No mixing errors on application start
  • Low loss of material when rinsing and purging
  • No consumables – the mixing head only needs to be rinsed
  • Variable speed control ensures optimum mixing results, even when processing special substances with very different specific properties
  • Short amortisation period due to limited use of consumables and low material waste

Dynamic mixing systems are typically used in casting and vacuum technology.

Want to find out which mixing system is right for your application?
Our specialists are happy to assist you and will be pleased to answer any questions you may have.