Maintenance - Filtration
Filtration
Efficient filtration is essential
for successful crop spraying, especially with increasing use of low-volume
application techniques requiring the use of small nozzles.
The Frazier sprayer is normally
fitted with a three stage filtration system. Firstly there is a high
capacity suction filter, followed by a pressure side filter after the
pump and finally, line filters fitted on the boom - one for each boom section.
They should all be cleaned out
at least once daily and each time you wash out to change chemicals.
If you are spraying a particularly "sticky" chemical or
wettable powders held in suspension you may have to clean some of the
filters out more often. Experience will soon tell you how often to
clean them.
Not only is it most important that
the filtration system is kept clean and well maintained, but also
that the correct size mesh is used in each filter for the different
rates of flow and chemical used. Always read the chemical container
label for advice on filtration.
Filtration should be applied in three stages, starting with a coarse mesh, and progressing to finer sizes. In order to maintain efficient filtration without restricting liquid flow the screen area used should be as large as possible.
Recommended mesh sizes
Use the chart below to establish
which size element should be fitted in each filter for each different
nozzle used. Your nozzle selection chart will show the nozzle output
in litres/min for each particular tip. The elements are all colour
coded for easy reference.
|
1.4 - 2.2
Over 3.4 litres / min
|
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