Type
RA-2 HV3
Operating Instructions
DOK-208-GB.doc
No. 0920-..,
0921-...
Examples for pneumatic circuitry of the automatic spray gun type RA-2 HV3
Analogue control
St
1
1
3
2
2
3/2 - G1/8
2/2 - G3/8
PDV
(e)
G1/4
PDV
(e)
G1/4
0,6 MPa
(6 bar)
O/S
(E)
O/S
F
R
Control of flat and circular jet air via
proportional pressure regulating valves
with analogue target value preset to
ensure optimum adjustment of the
spraying parameters to changing spraying
situations.
Preliminary air control is to be assured by
external control of the pressure regulating
valves.
Start of spraying: first activate spraying air
R (and, if applicable, F), then open control
air St!
End of spraying: first shut off St, then
close R and F.
PDV (e) = proportional pressure regulating
valve, electrically controlled
O/S (E) = opener/closer with vent
O/S = opener/closer
Fixed setting
St
13
2
3/2 - G1/8
F
R
1
2
2/2 - G1/4
1
2
2/2 - G1/4
0,6 MPa
(6 bar)
O/S
(E)
O/S
O/S
DV
(D)
DV
(D)
Control of flat and circular jet air via
pressure regulating valves to ensure
optimum adjustment of the spraying
parameters to a constant spraying
situation.
Preliminary air control is to be assured by
external control of the pressure regulating
valves.
Start of spraying: first activate spraying air
R (and, if applicable, F), then open control
air St!
End of spraying: first shut off St, then
close R and F.
DV (D) = pressure regulating valve,
adjusted to pressure range
O/S (E) = opener/closer with vent
O/S = opener/close
Notes
In particularly critical cases (such as the processing of substances with increased hazard
potential), it is advisable to equip the circular jet air (R) with a pressure monitor, which
should be installed directly in front of the automatic spray gun. This can prevent the
generation of a far-reaching material jet if there is insufficient air. A PE converter is
suitable for this purpose, for example.
The accessories required for this (e.g. control
valves, regulators etc.) are available from Krautzberger GmbH
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