Samson 3966, Mounting And Operating Instructions

Page: 30 / 48

30 EB 3966 EN
Measures for preparation
5.3.4 Compressed air quality
Risk of malfunction due to failure to comply
with required air quality.
Only use supply air that is dry and free of oil
and dust.
Read the maintenance instructions for up-
stream pressure reducing stations.
Blow through all air pipes and hoses thor-
oughly before connecting them.
With internal pilot supply over port 1 :
Instrument air (free from corrosive sub-
stances), 1.4 to 6 bar operating pressure
With external pilot supply over port 9
Instrument air (free from corrosive sub-
stances), air containing oil or non-corro-
sive gases with 0 to 10 bar operating
pressure
Compressed air quality according to ISO 8573-1
Particle size and
quantity
Oil content Pressure dew point
Class 4 Class 3 Class 3
≤5 µm and
1000/m³
≤1 mg/m³
–20 °C/10 K
below the lowest
ambient
temperature to be
expected
NOTICE
!
5.3.5 Pilot supply
K
VS
0.9
In the delivered state, the pilot supply is fed
internally over port
1 , if not configured oth -
erwise.
On mounting the solenoid valve to rotary or
linear actuators fitted with positioners,
change the pilot supply to an external pilot
supply over port
9 .
To change to an external supply through port
9 , proceed as follows:
1. Unscrew the fastening screws on the cov-
er plate.
2. Take the connecting plate off the enclo-
sure.
3. Remove the turnable gasket from the
groove and turn it so that the tag points
to
9 .
4. Refasten the connecting plate.
Fig. 4: Internal/external pilot supply