Manual throttle valve – Great Plains TSF1290 Operator Manual User Manual
Page 36
32
TSF1080, TSF1090, TSF1280 & TSF1290
Great Plains Manufacturing, Inc.
500-641M
05/10/2012
Manual Throttle Valve
When the manual throttle valve is full open (valve
in
Figure 28 on page 40), the pressure adjustment can be
very sensitive. The butterfly valve
has to move more
often causing additional wear.
To decrease the sensitivity, set the manual throttle
adjustment valve as follows:
1.
Open the throttle valve so that it is wide open and
there is full flow to the sprayer booms. Open the but-
terfly valve until it is full open.
2.
Close the throttle valve down until the pressure is
about 20 psi greater than the pressure you intend to
spray at. Spraying pressure is determined when cali-
brating sprayer. Refer to the Application Guide.
With this valve set, it decreases the flow through the
electric ball valve and reduces the sensitivity of the pres-
sure adjustment switch.