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.