Product category:
Coatings and coating systems
News Release from: Mixing Solutions | Subject: 'Counterflow' mixing impeller
Edited by the Manufacturingtalk Editorial
Team on 26 February 2003
Design is better for mixing shear
thinning fluids
Compared with conventional impellers, this design improves mixing performance and reduction of blend times, particularly for high-viscosity shear thinning fluids such as paints and coatings.
The Mixing Solutions 'Counterflow' impeller has been designed to improve mixing performance and reduction of blend times, particularly for high-viscosity shear thinning fluids such as paints and coatings, whilst offering substantial energy savings over conventional open impellers Easily retrofitted to existing agitators, these impellers operate at considerably higher impeller-to-tank diameter ratios
This article was originally published on Manufacturingtalk on 31 May 2006 at 8.00am (UK)
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Impeller mixes highly shear sensitive materials
Wide large-diameter blades that promote high flow and uniform distribution of shear feature an impeller that can be retrofitted to any existing mixer drive as well as new installations.
This is a significant advantage with shear thinning fluids where stagnancy at the vessel wall can be a problem.
Internal and external blades create "Counterflow" by pumping both upwards and downwards providing dependable product consistency in shorter cycle times.
They eliminate stagnant zones at low power.
These impellers are ideal for paints, coatings, polymers, foods, cosmetics where non-Newtonian fluid properties or wide viscosity changes are encountered.
Used in heat transfer applications, they are claimed to provide up to 200% improvement over standard impellers.
The ability to mix difficult high viscosity/shear thinning and water-like fluids in the same vessel with or without baffles makes them ideal for make-up vessels.
They also offer controlled vortexing and adjustable local dissipation, and can replace helical ribbon and anchor impellers in high viscosity applications.
Maintenance costs are reduced as the slower rotating speed of these impellers will increase the life cycle of both seals and equipment.
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