Graco 312775G User Manual
Fluid Supply
16
312775G
Fluid Supply
Requirements
ProMix models are available to operate air spray or
air-assisted systems with a capacity of up to 3800
cc/min.
air-assisted systems with a capacity of up to 3800
cc/min.
•
Fluid supply pressure tanks, feed pumps, or circu-
lating systems can be used.
lating systems can be used.
•
Materials can be transferred from their original con-
tainers or from a central paint recirculating line.
tainers or from a central paint recirculating line.
•
For an airless system, the user must supply a gun
trigger signal to the ProMix 2KS.
trigger signal to the ProMix 2KS.
•
See manual 313599 for Coriolis meter installation
and operation instructions.
and operation instructions.
•
If you are using dynamic dosing, see Fluid Connec-
tions at right and also see Setup the Fluid Mani-
fold for Dynamic Dosing on page 18.
tions at right and also see Setup the Fluid Mani-
fold for Dynamic Dosing on page 18.
NOTE: The fluid supply must be free of pressure spikes,
which are commonly caused by pump stroke change-
over. If necessary, install pressure regulators or a surge
tank on the ProMix fluid inlets to reduce pulsation. Con-
tact your Graco distributor for additional information.
which are commonly caused by pump stroke change-
over. If necessary, install pressure regulators or a surge
tank on the ProMix fluid inlets to reduce pulsation. Con-
tact your Graco distributor for additional information.
Fluid Connections
1. Connect the solvent supply lines.
a. Connect the solvent supply line to the 1/4 npt(f)
solvent purge valve inlet. See F
b. Multiple color system: also connect a solvent
supply line to the color change stack (Q), top
valve 4 or 5. See F
valve 4 or 5. See F
NOTE: Solvent supplied by a single source can cause
cross contamination and damage to the system. Install
check valves or use separated solvent sources.
cross contamination and damage to the system. Install
check valves or use separated solvent sources.
2. Connect the component A supply line(s).
Single color system: connect component
supply line to the component A flow meter
inlet.
supply line to the component A flow meter
inlet.
Multiple color system: connect compo-
nent A supply lines to the color change
valve stack (S) inlets. See F
nent A supply lines to the color change
valve stack (S) inlets. See F
. 7. The color
number is marked on the valve air supply
line.
line.
NOTE: Paint Recirculating System Only
•
The color change valves have two fluid
ports for each individual valve. If you are
recirculating paint, plumb the valves in one
port and out the other.
ports for each individual valve. If you are
recirculating paint, plumb the valves in one
port and out the other.
•
Another option is to use a tee fitting to recir-
culate.
culate.
NOTE: Verify that all unused fluid ports on the color
change valve stack are plugged before operation. An
open port will leak fluid.
change valve stack are plugged before operation. An
open port will leak fluid.
3. Connect the component B line to the component B
flow meter inlet.
NOTE: The component A and B fluid meter inlets have
fluid check valves to prevent backflow from fluid supply
pressure fluctuations. Backflow can cause ratio inaccu-
racies.
fluid check valves to prevent backflow from fluid supply
pressure fluctuations. Backflow can cause ratio inaccu-
racies.
4. Connect the gun fluid supply line between the fluid
manifold static mixer outlet and the gun fluid inlet.
Do not exceed the pressure rating of the lowest rated
component. See the identification label (F
component. See the identification label (F
IG
. 1 on page
4).
To reduce the risk of injury, including fluid injection,
you must install a shutoff valve between each fluid sup-
ply line and the fluid manifold assembly. Use the
valves to shut off fluid during maintenance and service.
you must install a shutoff valve between each fluid sup-
ply line and the fluid manifold assembly. Use the
valves to shut off fluid during maintenance and service.