Technical data

309030 13
Operation
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to
prevent the system from starting or spraying acci-
dentally. To reduce the risk of an injury from acci-
dental spray from the gun, splashing fluid, or
moving parts, follow the Pressure Relief Proce-
dure whenever you:
 are instructed to relieve the pressure,
 stop spraying,
 check or service any of the system equipment,
 or install or clean the spray nozzle.
1. Turn off the air and fluid supply to the gun.
2. Trigger the gun into a grounded metal waste
container to relieve air and fluid pressure.
Applying the Fluid
When using the HVLP spray gun, instead of a conven-
tional air spray gun, you may need to use slightly
slower movement and make fewer passes with the gun
to coat a part. This is due to the reduced spray velocity
produced by lower HVLP air pressures, along with a
larger fluid particle size because there is less air to
blow off solvents than what is produced by convention-
al air spray. Take care to avoid runs or sags as you
spray.
The spray gun has a built-in lead and lag operation.
When triggered, the gun begins emitting air before the
fluid is discharged. When the trigger actuation air is
stopped, the fluid stops before the air flow stops. This
helps assure the spray is atomized and prevents fluid
buildup on the air cap and tip.
Adjust the system control device, if it is automatic, so
the gun starts spraying just before meeting the work-
piece and stops as soon as the workpiece has passed.
Keep the gun a consistent distance, 6 to 8 inches (150
to 200 mm), from the surface of the object being
sprayed.
To obtain an even finish, overlap the strokes 50%.
RIGHT
WRONG
9393A
Fig. 10