20
VERSION 05/2018
ORDER NUMBER DOC 2312956
GA 4000ACIC
5.2 FUNCTIONAL DESCRIPTION
5.2.1 MODE OF OPERATION
Diagram:
AA / SA
CA
SA
AA
M
C
B_00521
Nozzle
SA = Shaping air
AA = Atomizing air
CA = Control air
M = Product
C = Circulation
Open:
The piston in the drive is charged with control air and moves toward the rear. This ensures
that the air valve which releases the shaping and atomizing air is opened rst. The product
valve is then opened with a mechanical delay. In this position, the pressurized coating
product is applied to the work piece.
Close:
The piston is relieved, and the product valve closes due to the pressure spring which
presses against the product valve tappet. The air valve is then closed, again with a spring
force and mechanical delay.
Additional functions:
The shaping air throttle is used to regulate the shaping air volume, while the atomizing air
is adjusted via an external pressure regulator. The two air streams do not ow separately
until they are downstream of the air valve, so that the pressure of the shaping air
corresponds roughly to that of the atomizing air and so that they inuence each other
during adjustment.
The product connections and the paint channels in the base plate are arranged so that
several guns can run in circulation mode.
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