Pratissoli MW Serie Manuel D'utilisation Et D'entretien page 72

17.3 MWNR pump
17.3.1 Operating instructions
The MWNR series pump has been designed to
operate in environments with atmospheres that are
not potentially explosive and for using salt water
rich in particulate, therefore it is considered ideal for
systems with fluid recirculation.
The durability of the piston seals is directly in
relation to the percentage of the presence of solids
in the fluid as regards both their size and their
density.
For a long seal life we recommend a particulate
grain size of no more than 200 micron and 20% max.
in volume.
For more information and a general system layout,
see par. 9.7.
17.3.2 Water temperature
The maximum permissible water temperature is
40°C. However, the pump can be used with water up
to a temperature of 60°C, but only for short periods.
In this case, it is best to consult the Technical or
Customer Service Departments.
17.3.3 Maximum pressure and flow rate
The rated specifications stated in our catalogue are the
maximum that can be obtained by the pump. Independently
of the power used, the maximum pressure and rpm indicated
in the specification label can never be exceeded unless upon
prior formal authorisation by our Technical or Customer
Service Departments.
17.3.4 Minimum rotating speed
The minimum permissible speed of the crankshaft for these
types of pumps is 300 rpm; any rpm other than as shown in
the performance table (see par. 17.3.5) must be expressly
formally authorised by our Technical or Customer Service
Departments.
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