Festo DPA 40 Manuel D'utilisation page 23

DPA
Consider the following correlations:
Setting
The set output pressure is lower than the
input pressure
The input pressure is always 2 bar lower than
the set output pressure
Increase the output pressure
Air volume/current on the input side is too low
Maximum controller setting
DPA− −10: typ. 10 bar, max. 14 bar
DPA− −16: typ. 16 bar, max. 22 bar
Setting the output pressure:
Note
Pressure gauges are strongly recommended for checking pressure levels.
1. DPA−63/100−10 only:
Pull the rotary knob away from the housing.
2. Turn the adjusting knob (4 è Fig. 1) clockwise as far as it will go (status as at
delivery).
3. Apply the input pressure to pneumatic port 1 on the DPA.
4. Turn the rotary knob (4 è Fig. 1) clockwise until the desired output pressure
is shown on the pressure gauge.
The pressure statuses are monitored by pressure gauges (è Fig. 4):
Pressure gauge (A): input pressure
Pressure gauge (B): output pressure
5. DPA−63/100−10 only:
Press the rotary knob towards the housing to lock it.
Festo DPA 0712d English
Reaction
The pressure controller on the DPA
vents until the pressures are equal
The DPA reaches the set output
pressure
Increase of air consumption
Output pressure fluctuates
The max. output pressure can be
exceeded by up to 40 %
(product−dependent scatter of the
regulator springs)
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