Pressure Relief Procedure - Graco 262927 Instructions Manual

Pressure Relief Relief Procedure
Pressure Pressure Relief
Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure
is manually relieved. To help prevent serious
injury from pressurized fluid, such as skin injection,
splashing fluid and moving parts, follow the
Pressure Relief Procedure when you stop spraying
and before cleaning, checking, or servicing the
equipment.
1. Flush the system. See
2. Close incoming air ball valve (B).
Figure 9
3. Set air regulator (F) to zero pressure.
332612C
Procedure
Procedure
Flush, page 27.
B
A
ti21575a

Pressure Relief Procedure

4. Hold applicator firmly against a grounded metal
pail. Open the material ball valve (V) on the base
of the applicator.
Figure 10
5. If you suspect the applicator tip or hose is
completely clogged, or that pressure has not
been fully relieved after following the previous
steps, slowly open the zero cavity relief valve (J)
at the pump outlet. See
6. If there is still pressure trapped down the line,
very slowly loosen the threaded swivel fitting at
the pump outlet while keeping it covered until the
pressure is relieved.
7. Flush the zero cavity relief valve (J). See
Flush, page 27.
NOTICE
NOTICE NOTICE
To prevent material hardening in zero cavity relief
valve, flush the valve after every use.
ti21632a
Details, page 9 .
15