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Complete replacement parts for the generator are available, thereby extending the life of this valuable piece of
equipment.
PRO Scientific believes that as homogenizing requirements increase from hand held units to bench top
laboratory units, the interchangeability of generators is a necessity. All of the PRO generators will fit any of
the PRO homogenizers. The ability to scale-up in size is important, therefore, all of the generators are
designed with this in mind. The choice of a generator depends on the end result desired and the material
being treated. One of the most important items to consider in choosing a generator is the peripheral speed,
which is critical for particle size reduction. The following shows the peripheral speeds that the individual units
can reach in the medium:
5mm diameter generators
7mm diameter generators
10mm diameter generators
20mm diameter generators
30mm diameter generators
The generators all work on the same principal. The medium to be processed is pulled into the bottom of the
tube by the rotor and forced out through the slots in the stator. The stator acts as an ideal flow breaker and
prevents, to a large extent, the rotation of the medium and allows the introduction of large mechanical
energies in a very small space. The vortex formation known in stirring is greatly reduced but cannot be
avoided altogether. In the shearing gap between the rotor and the stator, about 1,000 times more energy is
introduced into the medium than in stirring. The particles are pulled into the center of the rotor and then
forced radially outward. In this process, the particles are reduced in size by hitting sharp edges, shearing
between the edge of the rotor knife and the stator slots as well as cavitation. It usually takes only a few
minutes to obtain a fine particle size reduction. Longer processing times achieve only a minor improvement
in particle size reduction while increasing the temperature of the medium through the energy input.
Attaching the PRO Quick Connect Generator to the Motor Unit:
1) All generators are fitted to the motor unit by inserting the upper end of the generator into the collar
end of the motor.
2) Align the vertical slots in the generator with the locating pins in the motor collar by rotating the
generator.
3) Once aligned, push the generator inward as far as possible and turn the generator left. The collar is
spring loaded so you will feel some resistance as you push the generator inward and turn it.
AT NO POINT SHOULD EXCESSIVE FORCE BE NECESSARY TO CONNECT
THE GENERATOR TO MOTOR UNIT
4) Once you have turned the generator ¼ turn, release the generator and you will hear a distinct click
which is the generator dropping into its locked position.
5) To prevent the generator from disengaging while being used, insert the safety clip between the
upper collar of the generator and the bottom of the motor collar.
6) To disconnect the generator from the motor unit, remove the safety clip, push the generator up into
the motor collar as far as possible and turn the generator clockwise ¼ turn. The generator will be
pushed out of the motor collar by the force of the internal spring.
18
= 6 meters per second
= 9 meters per second
= 13 meters per second
= 26 meters per second
= 39 meters per second
**CAUTION**
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