are industrial equipment characterized by the presence of an impeller mounted on of a shaft which, thanks to the rotary motion transmitted by an electric motor, produces flow (axial or radial) in the liquids within which it is submerged.
Certain basic information must be known when choosing a mixer in order to identify the right product: the total volume of the fluid to be mixed, its nature and its viscosity, the possible presence of solids, the type of process in which the mixer is intended to be used.
Configuration of mixers
1. Upward flow - Downward flow2. Submerged circulator
Most general case: upward (1) or downward (2) flow may be obtained, depending upon special needs. For example the mixer in case No. 2 would be preferred with liquids that produce foam
A mixer to be considered when high liquid flow rates must be moved at a low delivery head: one case where a similar mixer would be preferable is in process vats, where both the liquid temperature and concentration must be kept constant.3. Mixer with circulating pipe - axial pump
A mixer to be used in cylindrical tanks without flow breakers or in all cases in which a vigorous axial component is necessary for remixing, such as for example in case of significant differences in specific gravity between the components to be mixed.
To select a mixer, it's necessary to select and quote the container, its cover and/or the mixer base itself. Refer to the drawings to correctly identify the recipient to be used:
Conical container: in this case it's important to also know the dimensions of the conical part: Flow breakers are recommended.
This drawing shows the case in which the best mixer installation is off center of the tank itself: this is to prevent liquid rotation phenomena.
In this third sample image shows a cylindrical container. The situation is very similar to that of a conical tank: Flow breakers are recommended in this case as well.
In addition to the tank dimensions and in addition to the precise indications of the maximum and minimum levels, it's very important to know the geometry of the flange coupling between the tank and agitator.
The two example drawings show two types of this coupling.