Great Plains TSF660 Operator Manual - Manual (Page 40)

TSF660
500-644M 9/1/2009
38
Manual Pressure Adjustment Valve
Refer to Figure 21
The manual pressure adjustment valve allows the
operator to choke down the amount of fluid flowing to
the boom. When the valve is wide open and the ap-
plication is at a low rate, a small amount of
adjustment on the butterfly valve makes a large dif-
ference in the flow rate. To dampen the sensitivity of
the system, adjust manual pressure adjustment
valve so that the pressure of the system is 20 psi
greater than the maximum flow you want to achieve.
To adjust the manual pressure adjustment valve,
open the butterfly valve until it is completely open.
Operate the pump at the same rpm you would when
spraying, and adjust the manual pressure adjust-
ment valve until the system pressure is reading 20
psi greater than the maximum application pressure.
On the Raven Monitor control system, you will have
to adjust the manual pressure adjustment valve with
clean water coming out of the nozzles.Operate the
pump at the same rpm you would when spraying,
and adjust the manual pressure adjustment valve
until the system pressure is reading 20 psi greater
than the maximum application pressure.
A good time to do this would be during calibration of
the sprayer.
!
CAUTION
If equipped with a boom control valve without a bypass
(Raven Monitor Unit) adjust the boom flow throttle valve
when the sprayer is full of clean water (no chemical add-
ed). Never adjust the valve when you would be exposed to
chemical coming out of the boom.
With the manual pressure adjustment valve set cor-
rectly, the system pressure will be able to be
adjusted without large fluctuations in the pressure.
NOTE: When the pressure is increased at a later
date, the manual pressure adjustment valve will
need to be opened, and re-calibrated.
Manual Pressure
Adjustment Valve
Butterfly Valve
Figure 21
Manual Pressure Adjustment
22939