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6. Fit the feed nozzle which is likely to give this feed rate using the table below as a
guide:
Feed nozzle
Flow rate Thin liquids
Thick liquids 10-15
(ml/min)
(* Supplied for use with the atomiser cone housing B120 only - do not use with the
atomiser cone housing A90 as this will result in flooding of the cone.)
7. Measure the flow rate which this feed nozzle gives using the actual spray liquid to
be used.
If the sprayer is new it may be noticed that with the white or brown feed nozzle fitted,
air trapped in the liquid feed tube reduces the flow rate. If this occurs, clear the air
by gently tapping the tube and, if necessary, flushing it through with a strong soap
solution to reduce the surface tension in it. Once a steady flow is established measure
the volume dispensed in one minute. If necessary fit a different feed nozzle and re-
measure the flow rate.
Read off from the calculator the actual walking speed which is needed to apply the
given volume application rate with the flow rate measured. It is preferable to walk
more slowly to achieve the required spray volume than to use higher flow rates.
e.g.
Glyphosate
Other herbicides
Increased Flow rate
White
Brown
30
45
15-25
Volume Application
Rate (l/ha)
10
20
20
Blue
Yellow*
60*
Do not use Do not use Do not use
25-35
35-45
The actual flow rate should be checked holding
the HERBIFLEX-4 in the spraying position
(see 'TO START SPRAYING'). Remove the
feed nozzle from the atomiser cone housing
and allow the liquid to flow into a suitable con-
tainer (such as the 50 ml measuring cup pro-
vided with the sprayer).
Band
Flow Rate
Width (cm)
(ml/min)
45
30
45
45
45
30
12
Orange*
Red*
45-55*
55+*
Nozzle
Walking Speed
(km/hr)
White
4
Brown
3
White
2
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