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Air Supply
3A1163A 17
Air Supply
Requirements
• Compressed air supply pressure: 75-100 psi
(517-700 kPa, 5.2-7 bar).
• Air hoses: use grounded hoses that are correctly
sized for your system.
• Air regulator and bleed-type shutoff valve:
include in each air line to fluid supply equipment.
Install an additional shutoff valve upstream of all air
line accessories to isolate them for servicing.
• Air line filter: a 10 micron or better air filter is rec-
ommended to filter oil and water out of the air supply
and help avoid paint contamination and clogged
solenoids. See F
IG. 5.
Air Connections
See the System Pneumatic Schematic on page 29.
1. Tighten all ProControl system air and fluid line con-
nections as they may have loosened during ship-
ment.
2. Install a bleed-type air shutoff valve into the control
air filter inlet. See F
IG. 5.
3. Connect a clean air supply line to the shutoff valve.
This air line supplies air to operate the gun, sole-
noids, and dispense valves.
NOTE: See Technical Data on page 35 for additional
air supply/consumption information.
4. lnstall a bleed-type shutoff valve into the air purge
valve inlet line.
5. See F
IG. 6. Use the air purge valve tubing (AT, sup-
plied) to connect the air purge valve (APV) inlet to a
clean, dry air supply (install filters/dryers as
needed).
Trapped air can cause a pump or dispense valve to
cycle unexpectedly, which could result in serious injury
from splashing or moving parts. Use bleed-type shutoff
valves.
NOTICE
Use separate air supply lines for the following two
connections to avoid contaminating the purge air line
with fluid if the air purge valve and a check valve
failed.
NOTICE
The ProControl potlife timer will not function properly
when used with multiple guns operating simultane-
ously. To avoid having mixed material set in the equip-
ment, carefully monitor potlife by some other means.
If using a Graco electrostatic PRO
™
Gun, a shutoff
valve must be installed in the gun air line to shutoff the
atomizing and turbine air to the gun. Contact your
Graco distributor for information on air shutoff valves
for electrostatic applications.
F
IG. 5. Air Supply Control
TI11895a
1
Install a bleed-type air
shutoff valve here.
1
1
For Fluid
Station
Controls
Main Air Inlet
For Air
Purge Valve
For Air
Flow Switch
Air Filters