Purging - Graco ProMix 2KS Operation

Purging

Read Warnings, page 9. Follow the Grounding
instructions in your system Installation manual.
To avoid splashing fluid in the eyes, wear eye protec-
tion.
There are 4 purging procedures in this manual:
• Purging Mixed Material (below)
• Purging Using Recipe 0 (page 96)
• Purging Fluid Supply System (page 96)
• Purging Sampling Valves and Tubes (page 98)
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.
Solvent purges the component B (catalyst, right) side of
the mix manifold and the inner tube of the integrator. Air
purges the component A (resin, left) side and the outer
tube of the integrator.
1. Go to Standby mode (remove Mix input).
Trigger the gun to relieve pressure.
If you are using a high pressure gun, engage the trig-
ger lock. Remove spray tip and clean tip separately.
If using an electrostatic gun shut off the electrostatics
before flushing the gun.
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2. Set the solvent supply pressure regulator at a pres-
3. If using a gun flush box, place the gun into the box
4. If the system is not completely clean, repeat step 3.
Trigger the gun to relieve pressure. Engage trigger
lock.
5. If spray tip was removed, reinstall it.
6. Adjust the solvent supply regulator back to its nor-
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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.
and close the lid. Go to Purge mode. The purge
sequence automatically starts.
If the gun flush box is not used, trig-
ger the gun (manual or automatic)
into a grounded metal pail until the
purge sequence is complete.
When done purging, the EasyKey automatically
switches to Standby mode.
NOTE: If necessary, adjust purge sequence so only
one cycle is required.
mal operating pressure.
System Operation
95