Special options
UF 01 DB 238. 07.04
147
5.11 Pressure-circulation system (DUS)
Important!
x For spraying operation always switch on the pressure circu-
lation system.
x When using drag hoses always switch off the pressure cir-
culation system.
Fig. 166
The pressure circulation system
• allows the permanent liquid circulation in
the spray line when the pressure circulation
system is switched on. For this every boom
part width section is provided with a flushing
hose (Fig. 166/1).
• can be operated at random with spray cock-
tail or flushing water.
•
reduces the undiluted residual amount to 2 l
for all spray lines.
The permanent liquid circulation
• allows an even spray pattern right from the
beginning as immediately after switching on
the sprayer boom the spray cocktail is
available at all spraying nozzles without any
delay.
• prevents blockage of the spray line.
The main components of the pressure circulation
system are:
• one hose for the flushing connection (Fig.
166/1) per boom part width section.
• the DUS-reversing tap (Fig. 167/1).
• the DUS-pressure relief-valve (Fig. 167/2).
The DUS-pressure relief-valve is provided
with a fixed adjustment in the factory and
reduces the pressure in the pressure circu-
lation system to 1 bar.
When the DUS reversing tap is in position (Fig.
167/1), the pressure circulation system is
switched on.
When the DUS reversing tap is in position (Fig.
167/3), the pressure circulation system is
switched off.
Fig. 167
When the DUS reversing tap is in position (Fig.
168
/1), liquid can be drained off the field sprayer.
Fig. 168
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1
3
2
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