Samson 3963 Series, Mounting And Operating Instructions

Page: 47 / 80

EB 3963 EN 47
Mounting and start-up
5.4 Pneumatic connection
Risk of injury due to high pressure inside de-
vice.
Prior to performing repair and maintenance
work on the device, depressurize the con-
necting lines.
The air connections are designed as thread-
ed holes with G or NPT thread depending
on the device version.
Î
Run and attach the connecting lines and
screw joints according to good profes-
sional practice.
Î
Check the connecting lines and screw
joints for leaks and damage at regular
intervals and repair them, if necessary.
Î
The K
VS
coefficient of an upstream pres -
sure reducing valve must be at least 1.6
times larger than the K
VS
coefficient of
the solenoid valve.
Î
Protect the exhaust air connections by in -
stalling a filter or taking other appropri -
ate precautions to prevent water or dirt
from entering them.
5.4.1 Sizing of the connecting
line
Î
Refer to the table on page 47 for the
minimum required nominal size of the
connecting line.
The specifications apply to a connecting line
shorter than 2 m. Use a larger nominal size
for lines longer than 2 m.
Valve size (connection length ≤2 m)
K
VS
0.16
0.32
1.4
2.0
4.3
—
Port
Pressure
4 1 and 3 4 9
≥1.4 bar ≥DN 6 ≥DN 8 ≥DN 10
≥DN 4 ≥2.5 bar
≥DN 4
≥DN 6 ≥DN 8
≥6 bar ≥DN 4 ≥DN 6
Types 3963-XXXX0X3/-XXXX014
Check whether the nominal size of the con-
necting line for these devices is sufficiently
sized as follows:
1. Unscrew the threaded stopper from port
9 and mount a pressure gauge.
2. The nominal size of the connecting line is
sufficient when the pressure reaches
1.3 bar or more during a switching pro
-
cess.
5.4.2 Compressed air quality
Risk of asphyxiation through displacement of
air on using nitrogen in unventilated spaces.
Discharge the exhaust air of the pilot and
booster valves over a common pipe to the at-
mosphere.
WARNING !
DANGER !