IMPORTANT INFORMATION ABOUT SPOT SPRAYERS
Silvan TrolleyPak Sprayers feature 12V positive displacement diaphragm pump with a pressure
sensing switch. The pressure switch interrupts power to the pump when the system pressure builds
up; power is resumed to the pump when the pressure falls.
The pressure switch does not in any
way substitute for a pressure regulator.
Restriction to the flow from the pump results in the increase in system pressure, which if great
enough will cause the pressure switch to cut the power to the motor. When using the 12-volt spray
unit in spot spraying applications the pressure switch can act to function as an automatic on demand
switch, stopping the pump when the spray lance trigger is released. When the spray lance trigger is
depressed fluid is released and the pressure will drop allowing the pressure switch to resume power
to the pumps motor. The Professional unit (TR25-P) features a pressure regulator that allows you to
set your maximum spray pressure and bypass excess pump flow back into the tank, in these
applications the pumps electric pressure sensing switch will not act as an On-Demand switch
because of pump flow bypassing back into the tank will stop pressure from building to high enough
to automatically switch the pump off.
The use of a TrolleyPak for the application of chemical requires initial set up before operation to
ensure the users personal safety, an even spray pattern and long life of the pump. Depending on
your spraying requirements you may need to change or adjust the nozzle to suit your desired droplet
size or spray pressure.
When the flow rate through the spray lance nozzle is very low, the pump may re-pressurize the
outlet faster than the fluid is being released causing rapid pulsation/cycling (pump switching
ON/OFF within 1 seconds).
If the pump is subjected to rapid pulsation/cycling during normal operation, or for infrequent
periods may reduce the life of the pump.
Applications which exhibit rapid pulsation/cycling should
have restrictions in the nozzle minimized by fitting a larger (less restrictive nozzle) Pulsation can
cause premature failure of the pressure switch or pump; these failures are not as a result of the
workmanship of the component.
It is therefore highly recommended that the user performs the appropriate set-up to facilitate in
trouble free usage.
For the Domestic unit (TR25-S7), screw the fitting on the end of the hose to the outlet of the pump.
For the Professional unit (TR25-P), the hose needs to be connected to the hose-barb near the
pressure regulator with a hose clamp. As the Professional unit (TR25-P) is not supplied with a Spray
gun or boom, you will also be required to connect the item to the delivery end of the spray hose.
Slip the trolley handle into the locator on the frame and tighten the tri-screw to affix the handle at
you selected handle height.
Specifications (cont.)
Installation
