Although the majority of the mixing and dispersion work done in a paint plant is done by high speed devices such as high speed dispersers and mills, both formulators and production people should also understand low speed mixing techniques, and the equipment used to complete these types of processes. Low speed devices are generally used to blend colors, let- down finished dispersions and keep components that may settle in suspension in large storage tanks. This type of mixing requires turbulent flow in a fairly low viscosity medium. The tools used are simple turbines of several types which are coupled to fairly low specific power drives in order to provide either radial or axial flow, or a mixture of the two.
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