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Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you
D Are instructed to relieve the pressure
D Stop spraying
D Check or service any of the system equipment
D Install or clean the spray tip
1. Lock the gun trigger safety and any other
equipment safety locks.
2. Turn off the power to the pump.
3. Unlock the gun trigger safety.
4. Close the bleed-type master air valve (required in
your system).
5. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
6. Lock the gun trigger safety.
7. Slowly open the drain valve (required in your
system), and have a container ready to catch the
drainage.
8. Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved
after following the steps above, very slowly loosen the
tip guard retaining nut or hose end coupling, and
relieve pressure gradually, then loosen completely,
then clear the tip or hose.
Operating the Regulator
CAUTION
D To avoid contaminants clogging or damaging the
regulator, you must clean and test the new
system thoroughly before you admit fluid to the
regulator.
D Always use the lowest possible air and fluid
pressures for your application. High pressures
can cause premature spray tip and pump wear.
NOTES:
D The fluid pressure regulator controls pressure
downstream from its outlet.
D If using an accessory fluid pressure gauge (H), to
ensure a correct gauge reading, relieve the spray
gun line pressure after reducing the regulator
pressure.
1. Back the regulator adjusting screw (18) out (turn
counterclockwise) until there is no spring pressure.
Relieve the spray gun line pressure.
2. Turn the adjusting screw clockwise to increase the
fluid pressure.
3. Adjust the pump air pressure and fluid regulator for
the desired spray pattern. Use the lowest possible
air and fluid pressures for your application.
4. In a circulating system, also adjust the back
pressure valve.
5. Record all the settings for future reference.