Purging; Purging Mixed Material; Purging Fluid Supply System - Graco ProMix 2KE Operation

Purging

There are 2 purging procedures in this manual:
•

Purging Mixed Material

•

Purging Fluid Supply System

Use the criteria listed in each procedure to determine
which procedure to use.
Purging Mixed Material
There are times when you only want to purge the fluid
manifold, such as:
• end of potlife
• breaks in spraying that exceed the potlife
• overnight shutdown
• before servicing the fluid manifold assembly, hose or
gun.
1. Press on Run Mix Spray (Screen 2) or
from any screen.
2. Trigger the gun to relieve pressure.
3. If you are using a high pressure gun, engage the
trigger lock. Remove spray tip and clean tip sepa-
rately.
4. If using an electrostatic gun shut off the electrostat-
ics before flushing the gun.
5. Set the solvent supply pressure regulator at a pres-
sure high enough to completely purge the system in
a reasonable amount of time but low enough to
avoid splashing or an injection injury. Generally, a
setting of 100 psi (0.7 MPa, 7 bar) is sufficient.
6. If using a gun flush box, place the gun into the box
and close the lid. Press
(Screen 2). The purge sequence automatically
starts.
If the gun flush box is not used, trig-
ger the gun into a grounded metal
pail until the purge sequence is com-
plete.
3A0868A
on Run Mix Spray
When done purging, the system automatically
switches to Standby mode.
7. If the system is not completely clean, repeat step 6.
NOTE: If necessary, adjust purge sequence so only
one cycle is required.
8. Trigger the gun to relieve pressure. Engage trigger
lock.
9. If spray tip was removed, reinstall it.
10. Adjust the solvent supply regulator back to its nor-
mal operating pressure.
Purging Fluid Supply System
Follow this procedure before:
• the first time material is loaded into equipment
• servicing
• shutting down equipment for an extended period of
time
• putting equipment into storage
1. Press on Run Mix Spray (Screen 2) or
from any screen.
2. Trigger the gun to relieve pressure.
3. If you are using a high pressure gun, engage the
trigger lock. Remove spray tip and clean tip sepa-
rately.
4. If using an electrostatic gun, shut off the electrostat-
ics before flushing the gun.
5. Disconnect the component A and B fluid supplies at
the pump inlets, and connect solvent supply lines.
Purging
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