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Installation
1. Connect 5/32 in. (4 mm) OD air actuation tubes
from the valve solenoids to the air inlets (A) of each
valve. See F
. 1.
IG
NOTE: The high pressure color change valve uses a
spring-operated valve closure vent (20) which does not
require a second air actuation line. If you are installing a
bare valve, remove the elbow fitting from the top port
and install the breather vent. Replace the spring with the
one marked with black stain. Both the breather and the
marked spring are shipped loose.
2. Connect fluid supply lines to the 1/4 npt(f) inlet (B) of
each valve adapter. Supply solvent to one valve (S)
at the top of the stack.
NOTE: Excessive inlet fitting torque may cause the fit-
ting to extend past its normal depth and contact the
valve needle, resulting in misalignment and leakage.
After installing the inlet fitting, verify that the needle trav-
els freely by charging the valve with air or removing the
cap and manually actuating the needle.
NOTE: Paint Circulating System
The color change valves have two fluid ports for
each individual valve. If you are circulating
paint, plumb the valves in one port and out the
other. Another option is to use a tee fitting to cir-
culate.
NOTE: Verify that all unused fluid ports on the color
change valve stack are plugged before operation. An
open port will leak fluid.
3. Connect the gun fluid supply line to the fluid outlet
port (C) of the color change manifold.
NOTE: A check valve is recommended at the inlet of all
valves to prevent backflow if a valve fails, and to prevent
color crossover if two dead head valves are open at the
same time.
NOTE: High pressure valves are factory-set at one turn
open from fully closed. This setting provides the
required spring force to prevent fluid back flow from the
outlet manifold to the valve at outlet manifold pressures
up to 3000 psi (21 MPa, 210 bar). If valves on the stack
are not being used, close the valve completely or plug
the valve inlet and circulation ports.
If a valve is adjusted more than 1-1/4 turn open, back
flow pressure will be reduced.
312783G
A
20
C
High Pressure Valve Stack
A
A
C
Low Pressure Valve Stack
F
. 1. Valve Stack Connections
IG
Installation
S
B
TI11665b
S
B
TI11668b
5
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