Since 1948 Silverson has been the leader in the development of high-speed
high shear mixers. Supplying customers throughout the world
in industries as diverse as pharmaceuticals, cosmetics,
foods, chemicals and lube oils.
At Silverson we specialize in the manufacture
and application high shear mixers that are capable of reducing mixing times up to 90 percent
when compared to conventional methods.
The specially-designed workhead also allows each mixer to disintegrate,
dissolve and homogenize at the same time.
In this demonstration sugar crystals are stirred by a conventional agitator.
The ingredients very quickly begin to move as a single body
and although the crystals will eventually dissolve a high shear mixer
can achieve the same results
in a matter of seconds.
How was the high shear mixer able to do this?
The high-speed rotation of the rotor
exerts a powerful suction drawing liquid and solid materials
upwards into the workhead.
Centrifugal force then drives the materials towards the periphery of the workhead
where they're rapidly milled between the rotor blades and the stator.
This is followed by intense hydraulic shear as the materials are forced out
through the stator and back into the mix.
Fresh material is continually drawn into the workhead resulting in a
circulatory pattern of mixing all below the surface.
As a result there is little or no turbulence above the surface and aeration is reduced to a minimum.
The Silverson design not only substantially reduces mixing times
but also allows the machine to operate far beyond the capabilities of a conventional agitator.
Oil and water emulsions for example even with an emulsification
agent present are virtually impossible to form using a stirrer or agitator.
The solution will separate within seconds of the machine being switched off.
The Silverson high shear mixer however, produces an almost instantaneous stable emulsion.
Another common problem is that of dispersing gums and thickening agents with a conventional agitator.
Thickening agents must be added slowly
and carefully over a long period of time in order to prevent the kind of agglomerates seen here.
Once such agglomerates have been formed the agitator cannot disperse them.
With a Silverson mixer the powder can be added quickly
and will still form a clear agglomerate-free solution.
Identical results can be achieved with much larger volumes using production-scale Silverson mixers.
The action of any Silverson mixer can be modified by the use of different workheads
which enable any machine to perform a wide range of functions.
These workheads are quickly and easily changed.
The Silverson range of equipment includes many specialized machines designed to suit specific requirements.
For example, the Duplex Disintegrator seen here,
instantly popping oranges, is used for reducing and homogenizing large solids in a single operation.
Originally developed for the disintegration and solubilization of solid rubbers and polymers
and with capacities of up to 5,000 gallons,
the Duplex's twin workhead assembly is ideal for the high-speed production
of lube oils, adhesives and rubber solutions.
A complete range of In-Line mixers is available for the continuous processing or recycling of products.
Self pumping and aeration free, their design makes it impossible for any material to bypass the workhead
without being subjected to intense mechanical and hydraulic shear.
Easily added to an existing process, a Silverson In-Line mixer
can dramatically improve productivity, greatly reducing the mixing time,
while improving the product quality and uniformity.
Since our beginning Silverson has supplied customers in 150 countries,
increase productivity, reliability
and minimal maintenance requirements have all contributed to the growth of our
large and loyal customer base.
In addition to Silverson's range of standard equipment
we design and manufacture mixers for individual customers specific needs.
The Silverson D2500 was developed for the disintegration and solubilization of
large polymer bales in the chemical industry and has since found many additional
applications in industries as diverse
as adhesives, asphalt, lube oils and foods.
The Silverson Flashblend was specifically designed for the continuous dispersion of powders into liquids.
Capable of incorporating up to 22,000 pounds of powder per hour.
It gives a totally agglomerate free product with the minimum of aeration.
Typical applications include gums and thickeners, carbopol, flour, starches and milk powder.
The Silverson Ultramix was developed for applications which are beyond the capabilities of a conventional
agitator or stirrer, but do not necessarily require the intense high shear of a Silverson rotor/stator mixer.
Ideal for incorporating powders in high viscosity mixes, the single-piece hygienic mixing head
is equally suited to aggressive chemical service and the most demanding sanitary standards.
Our extensive test facilities enable our customers to test products and further discuss their applications.
Silverson Machines are a complete departure from the use of conventional mixers, they will increase efficiency, output and profit.
Silverson the first name in high shear mixers.