Operation - Graco F Series Instructions-Parts List Manual

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 or install or clean the spray tips.
1. Lock the gun/valve trigger safety.
2. Shut off the air to all pumps.
3. Close the bleed-type master air valve (required in
your system).
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Operation

4. Close the fluid valves to your gun/valve, if so
equipped.
5. Unlock the gun/valve trigger safety.
6. Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger it to relieve
pressure.
7. Lock the gun/valve trigger safety.
8. Open the fluid drain valve (required in your sys-
tem); have a container ready to catch the drain-
age.
9. Leave the fluid drain valve open until you are ready
to spray again.
10. If you suspect that the spray tip or hose is com-
pletely 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. Now clear the tip or hose.