Flushing Procedure - Graco PR70 Operation & Maintenance Manual

Flushing Procedure

Flushing Procedure
To avoid fire and explosion, always ground equipment
and waste container. To avoid injury from splashing,
always flush at lowest possible pressure. Flush
equipment only in a well-ventilated area. Do not
dispense flammable fluids. Do not turn on heaters
while flushing with flammable solvents.
Flush out old fluid with new fluid or flush out old fluid
with compatible solvent before introducing a new fluid.
All fluid components are compatible with common sol-
vents. Use only moisture-free solvents. See solvent
manufacturer's information for material compatibility. Do
not use water.
Ground the solvent pails used when flushing: Refer to
Ground the system.
If flushing with a compatible solvent, perform the follow-
ing procedure:
NOTE: Flushing must be used on systems with an
over/under block.
1. Turn power off.
2. Blow compressed air through the supplied flush port
in the over/under block to get mixed material out of
the over/under block and mixer.
3. Pressure feed solvent through the same port until
no mixed material comes out of the outlet.
4. Blow air through a second time to dry out the com-
ponents.
NOTE: Even though flushing will get the majority of the
material out of the over/under block and mixer, for best
results disassemble and clean this parts individually.
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