Spray Adjustments - Graco Reactor 2 H-30 Operation

9. Check fluid pressure gauges (GA, GB) to
ensure proper pressure balance. If imbalanced,
reduce pressure of higher component by
slightly turning PRESSURE RELIEF/SPRAY slightly slightly
valve for that component toward PRESSURE
RELIEF/CIRCULATION
balanced pressures.
10. Open gun fluid inlet valves A and B.
Fusion Fusion Fusion
NOTICE
NOTICE NOTICE
To prevent material crossover on impingement
guns, never never never open fluid manifold valves or
trigger gun if pressures are imbalanced.
334945J
until gauges show
Probler Probler Probler
11. Disengage gun piston safety lock.
Fusion
Fusion Fusion
12. Pull gun trigger to test spray onto cardboard. If
necessary, adjust pressure and temperature to
get desired results.

Spray Adjustments

Adjustments
Spray Spray Adjustments
Flow rate, atomization, and amount of overspray are
affected by four variables.
• Fluid Fluid pressure Fluid pressure pressure setting. setting. Too little pressure results setting.
in an uneven pattern, coarse droplet size, low
flow, and poor mixing. Too much pressure results
in excessive overspray, high flow rates, difficult
control, and excessive wear.
Fluid temperature. temperature. Similar effects to fluid pressure
• Fluid Fluid temperature.
setting. The A and B temperatures can be offset to
help balance the fluid pressure.
Mix chamber chamber size. size. Choice of mix chamber is based
• Mix Mix chamber size.
on desired flow rate and fluid viscosity.
• Clean-off Clean-off Clean-off air air adjustment. air adjustment. Too little clean-off air adjustment.
results in droplets building up on the front of the
nozzle, and no pattern containment to control
overspray. Too much clean-off air results in
air-assisted atomization and excessive overspray.
Spraying
Probler
Probler Probler
53