Graco 214706, Instructions-Parts List Manual

Page: 8 / 24

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Operation
CAUTION
The new system must be cleaned and tested
thoroughly before admitting fluid to the regulator
to avoid contaminants clogging or damaging the
regulator.
Always use the lowest possible air and fluid
pressures for your application. High pressures
cause premature spray nozzle and pump wear.
NOTE: Reference numbers and letters in parentheses
in the text refer to the Figs. and Parts Drawing.
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
Read warnings, page 5.
1. Shut off the pump.
2. Close the fluid regulator’s inlet ball valve. Refer to
Figs. 1 and 2.
3. Relieve fluid pressure in the fluid regulator by
triggering the spray gun.
Flushing Procedure
Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
1. Record the pressure adjustment setting of the fluid
regulator before flushing.
2. Shut off the pump and relieve fluid pressure in the
system by triggering the gun and opening the back
pressure regulator or other bypass valve.
3. Never exceed the maximum working pressure of
the lowest rated system component. Remove the
gauge if the flushing pressure will exceed the
gauge range.
4. Open the fluid regulator fully.
a. Spring Operated Regulators Only (see Fig. 3).
The regulator can be fully opened in two ways:
Using the male end (B) of the regulator
key (24), turn the socket–head adjustment
screw (19) fully counterclockwise. The
pressure setting will be retained.
Using the female end (A) of the regulator
key (24), turn the adjustment screw (12)
fully clockwise. You will have to reset
pressure after flushing.
b. Air Operated Regulator Only. The regulator
can be fully opened in two ways:
Close the outlet valve at the air regulator
and open the air regulator bypass valve, to
supply air directly to the fluid regulator; do
not exceed the maximum rated air pres-
sure of the fluid regulator. Pressure setting
of the fluid regulator will be retained using
this method.
Increase the air regulator setting to fully
open the fluid regulator. You will have to
reset the fluid regulator’s pressure setting
after flushing.
5. Supply solvent to the system. Set pump to the
lowest possible pressure, and start pump.
6. Flush until thoroughly clean.