How To Stop The Pump; Chemical Attack And Washing - Bertolini GIARDINAGGIO Serie Manual De Uso Y Mantenimiento

4.2

How to stop the pump

1. Reset the delivery pressure as described in point 1 of the paragraph "HOW TO
START THE PUMP"
2. Stop the pump by reducing the revolutions to zero.
To prevent the pump from being damaged, it is essential to flush it out after use, by
allowing it to operate with clean water for a few minutes and then to empty it.
WARNING!
When you stop the pump, make sure that no pipe contains liquid under pressure.
4.3

Chemical attack and washing

After the treatment, the system and the pump must be washed so as to ensure long life
and efficiency. The tank must be emptied and the product placed in an appropriate
container, then filled to a third with clean water, which must be allowed to circulate through
the pump, at zero pressure.
However, there are systems which have a dedicated circuit for this service and for storing
the clean water.
In view of the aggressive nature of all the chemical products available on the market,
negligent cleaning tends to deteriorate all the rubber and aluminium parts of the pump,
regulator, hoses, etc., within a very short time. It also causes the valves to jam and clogs
the nozzles.
Various different types of diaphragm (Buna, Viton, Desmopan and HPS®) are available,
and offer certain safeguards concerning the aggressive nature of the chemical products.
Please contact our technical service for advice about how to choose the most suitable type
in relation to the product used and/or if there are problems.
To prevent the diaphragms from rupturing, ask our technical service beforehand for
information as to which type is the most compatible with the product to be used by the
pump.
Shape of the standard diaphragm
Shape of the diaphragm after chemical attack
E
XAMPLES OF RESISTANCE TO CHEMICALS OF THE BASIC TYPE
.
76