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When
choosing the type of pump required, the abrasion grade
of the fluid is of fundamental importance as the value
is directly responsible for determining the durability
of the pump.
When using abrasive fluids, the rotation speed of the
rotors must be as low as possible.
Whether pumping abrasive products or products with a greater
density than water, the values expressed in the table
at the side can vary considerably. It is therefore wise
in these cases to choose a pump with larger dimensions
than those of the theoretical pump.
The values given in the table refer to tests performed
with fluids with a similar density to water.
To guarantee correct function of the pump, it is recommended
to ensure that there is no air in the suction pipe and
that a constant supply of the material to be pumped is
available. This prevents the pump from turning dry and
avoids overheating which could damage the stator.
To choose the correct pump, the following points should
be considered:
- Type of system installation in which the pump is to
be inserted.
- Type of fluid to be pumped.
- Density, specific weight, abrasion grade and temperature
of the fluid to be pumped.
- Tube diameter.
- Type of motor coupling. |
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