Graco 236-030 Instructions-Parts List Manual page 15

11. Set the atomization fluid pressure.
NOTE: Atomization fluid pressure will vary based on
the viscosity of the fluid, the flow rate desired, and
other characteristics of your system.
Atomization Chart
Starting Fluid
Fluid Viscosity Pressure
40 or more 1500 psi
seconds in #2 (105 bar)
Zahn cup*
25–40 seconds 1000 psi
in #2 Zahn (70 bar)
cup**
25 or less 500 psi
seconds in #2 (35 bar)
Zahn cup***
* Includes fluids with 60% volume solids or greater.
Examples: high-build high-solids protective urethanes and
epoxies
** Includes fluids with 40 to 60% (medium) volume solids.
Examples: alkyd enamels, some protective urethanes and
epoxies
*** Includes fluids with 40% volume solids or less.
Examples: stains, lacquers, and decorative urethanes
A. Close the air control valve (43) by turning it fully
clockwise and turn the ES ON-OFF lever (26) to
OFF.
26
OFF
Fig. 11A
Gun Setup
B. Set the fluid pressure with the fluid regulator (J),
Fluid Pressure
Increments
200 psi
(14 bar)
100 psi
(7 bar)
100 psi
(7 bar)
Fig. 11B
C. With the ES ON-OFF lever OFF and the air control
D. Increase the fluid pressure by the Fluid Pressure
E. Spray another test pattern across a piece of paper.
43
close
F. Without being concerned about the presence of
01998
based on the Starting Fluid Pressure in the Atom-
ization Chart at left for the type of fluid you are
spraying.
valve closed, spray a test pattern across a piece of
paper, holding the gun 12 inches (305 mm) from
the surface.
Without being concerned about the presence of
"tails", note the particle size.
Increment shown in the Atomization Chart for the
type of fluid you are spraying.
"tails", compare the particle size of the two test
patterns.
A decrease in particle size indicates improved at-
omization.
J
01999A