Pneumatic Connections; Connecting The Supply Air; Port Labeling; Sizing Of The Connecting Line - Samson 3966 Mounting And Operating Instructions

5.3 Pneumatic connections

WARNING
!
Risk of injury by possible movement of ex-
posed parts (actuator or valve) after connect-
ing the signal pressure.
Do not touch or block exposed moving parts.
5.3.1 Connecting the supply
air
NOTICE
!
Risk of malfunction due to incorrect sequence
of mounting, installation and start-up.
Keep the following sequence.
1. Remove the protective caps from the
pneumatic connections.
2. Mount the solenoid valve to the control
valve.
3. Connect the supply air.
4. Connect the electrical power.
The pneumatic connections are optionally
designed as a bore with ¼ NPT or G ¼
thread. Customary fittings for metal or
copper tubing or plastic hoses can be used.
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.
Î The K coefficient of an upstream pres-
VS
sure reducing valve must be at least 1.6
EB 3966 EN
Measures for preparation
times larger than the K
the solenoid valve.
5.3.2

Port labeling

K 0.9
VS
Inscription
1
9
2
3
5.3.3 Sizing of the connecting
line
Î Refer to the table below for the minimum
required nominal size of the connecting
line at the port 1 of the enclosure.
The specifications apply to a connecting line
shorter than 2 m. Use a larger nominal size
for lines longer than 2 m.
Connection
Pipe 6x1 mm
1)
Hose 4x1 mm
2)
Outside diameter x Wall thickness
1)
Inside diameter x Wall thickness
2)
coefficient of
VS
Function
Supply air
External pilot supply
Output
Venting
9 1
12x1 mm
9x3 mm
29