Operation
22
312798J
Install the Spray Tip
Follow Pressure Relief Procedure, page 20. Install the
spray tip and tip guard as explained in your separate
gun manual, supplied. Be careful not to bend the elec-
trode wire.
The fluid output and pattern width depend on the size of
the spray tip, the fluid viscosity, and the fluid pressure.
Use the Spray Tip Selection Chart in your gun instruc-
tion manual as a guide for selecting an appropriate
spray tip for your application.
Adjust the Atomization
1.
Do not turn on atomizing air supply.
2.
Turn the gun’s ES ON/OFF lever to OFF.
3.
Fluid pressure is controlled by the air pressure sup-
plied to the pump (pump air regulator). Set fluid
pressure at low starting pressure. For low viscosity
fluids (less than 25 sec, #2 Zahn cup) with lower
percent solids (typically less than 40%), start at 300
psi (2.1 MPa, 21 bar) at pump outlet. For fluids with
higher viscosity or higher solids content, start at 600
psi (4.2 MPa, 42 bar). Refer to the following exam-
ple.
Example:
4.
Hold gun perpendicular and approximately 12
inches (304 mm) from surface.
5.
Move gun first, then pull gun trigger to spray onto
test paper.
6.
Increase fluid pressure in 100 psi (0.7 MPa, 7 bar)
increments, just to the point where a further
increase in fluid pressure does not significantly
improve fluid atomization. Refer to the following
example.
Example:
Pump
Ratio
Pump Air
Regulator Setting
psi (MPa, bar)
Approximate
Fluid Pressure
psig (MPa, bar)
15:1
x
20 (0.14, 1.4)
=
300 (2.1, 21)
30:1
x
20 (0.14, 1.4)
=
600 (4.2, 42)
Pump
Ratio
Pump Air Regulator
Increment
psi (MPa, bar)
Incremental
Fluid Pressure
psi (MPa, bar)
15:1
x
7 (.05, 0.5)
=
100 (0.7, 7.0)
30:1
x
3.3 (0.02, 0.2)
=
100 (0.7, 7.0)
