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SINGLE LEVER CONTROL UNIT
Pressure
Regulator
“B”
By-pass
Control
“A”
Outlet
Valves
“C”
Sin
le Flow Control “D”
Outlet
Valves
“C”
swing over to open
all valves
o
en
Operation
Once the required outlets have been selected
using the individual valves, spraying may be
started and stopped by using the single lever. If
you wish to stop spraying but leave the tractor PTO
running, close the single lever and move the by-
pass lever to by-pass mode.
Silvamatic Control Unit
The Silvamatic control is a pressure compensating
unit which provides a constant flow rate if the
tractor PTO speed changes by up to 15%, thus
maintaining a constant application rate. It also
maintains constant pressure when individual outlet
valves are opened or closed.
The unit can be supplied with either four or six
outlets and includes a self cleaning filter and a
suck back device. A dual stage pressure gauge is
fitted to facilitate accurate setting of spraying
pressure at low or high readings.
Preliminary Adjustments Prior to Starting
1. Set the by-pass control to by-pass mode (lever
“A” up).
2. Set the general pressure regulator to minimum
(turn knob “B” fully anti-clockwise).
3. Close all outlet valves (levers “C” horizontal).
4. Set the compensating pressure regulator to
maximum (turn knob “D” fully clockwise).
5. Check that all outlet calibrators “E” are fully
screwed in.
6. Start the sprayer, which will operate without
pressure and by-pass all fluid to the tank.
Operation
1. Set the by-pass control to pressure mode
(lever “A” down).
2. Adjust the maximum system pressure with
pressure regulator “B” until the gauge reads
approximately 15 Bar.
3. Adjust the spraying pressure with regulator “D”
until the pressure drops to your required
operating pressure (turn knob anti-clockwise to
reduce pressure).
4. Open the individual outlet valves to direct fluid
to the required sections of the boom (set levers
“E” vertically up).
5. Once the required outlets have been selected,
spraying can be started and stopped by
moving the by-pass lever “A” between pressure
and by-pass positions.
Adjusting the Outlet Calibrators
Each outlet valve has a calibrator which, after the
initial setting, allows boom sections to be operated
independently or in combination without altering
the pressure as the individual outlets are opened or
closed.
To set the calibrators run the sprayer at the
required spraying pressure and adjust each outlet
as follows:
1. Note the pressure on the gauge when the
outlet is open.
2. Close the outlet and adjust the calibrator “E”
until the pressure is the same as in 1. above
(screwing the calibrator out decreases the
pressure and vice versa).
3. Once set, no further adjustment need be made
unless the boom nozzles are changed.
By-pass
Control
“A”
Spraying
Pressure
Regulator
“D”
Outlet
Valve
“C”
Calibrator
“E”
SILVAMATIC CONTROL
Maximum
Pressure
Regulator
“B”
(110 pages)
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