Flushing The Diaphragm Valve - Graco EcoQuip EQ200T Operation, Repair, And Parts

Repair
Flushing the the Diaphragm Diaphragm Valve
Flushing Flushing the Diaphragm
This procedure can be performed with the component
still mounted in the panel.
If large-grit abrasive or other foreign matter becomes
lodged in the diaphragm valve, it will become
necessary to flush the valve. This is a simple
procedure; however, it does cause the release of a
large volume of air to escape through the released
quick coupling. You need to be prepared for the
release of air by pulling the quick coupler grommet
out of its groove so that it does not get lost.
1. Operate the unit in WASH (see
Using the Wash Feature, page
all abrasive clears from the blast hose.
2. Close the abrasive ball valve, then turn the
selector valve to RINSE. Blast until the hose is
clear of abrasive and water.
28
Valve
Valve
3. Disconnect the quick coupling at the abrasive
17) until
4. Turn the selector valve to WASH. Remain in
5. Make sure nothing is in the path of the open quick
6. Hold the male end of the quick coupler up to
7. Turn the selector valve to RINSE to stop the flow
8. Re-insert the grommet into its internal groove
9. Reconnect the quick coupler. If properly cleaned
ball valve (not at the bottom of the pot).
WASH until all debris is clear. Remove the
grommet in the quick coupler.
coupler, then briefly engage the blast control
switch several times.
NOTE: High flow air should escape through the
NOTE: NOTE:
cam-lock coupling. If this does not occur, the
diaphragm valve is malfunctioning. Replace
entire diaphragm canister.
NOTE: Do not disassemble the canister.
NOTE: NOTE:
the water coming from the cam-lock end of the
coupler. Clean off any dirt or abrasive.
of water.
inside the cam-lock.
and connected, there should be no leaks at the
coupler during operation.
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