12
EB 8392 EN
Pneumatic connections
4.5.1
Note on attachment to
Type 3275 Piston Actu-
ator
When mounting the reversing amplifier with
the Type 4708-54 Supply Pressure Regulator
and positioner onto a Type 3275 Piston Ac
-
tuator:
Î
Mount the positioner in such a manner
that the pneumatic connections are lo
-
cated on the left side (Fig. 7).
The supply pressure regulator can only
be mounted onto the reversing amplifier
in this mounting position.
Fig. 7:
Type 3710 Reversing Amplifier,
Type 4708-54 Supply Pressure
Regulator with Type 3730 Positioner
mounted on Type 3275 Piston Actuator
5
Pneumatic connections
The air connections are designed either with
¼-18 NPT or G ¼ threads. Customary fit
-
tings for metal or copper tubing or plastic
hoses can be used.
Signal pressure connections
Î
See dimension diagram on page 15
for connections
Î
Y
1
: Connect output Y
1
to the signal
pressure connection on the actuator that
causes the valve to open when the pres
-
sure rises.
Î
Y
2
: Connect output Y
2
to the signal
pressure connection on the actuator that
causes the valve to close when the pres
-
sure rises.
5.1
Pressure gauges
The Type 3710 Reversing Amplifier is de
-
signed with connections for two pressure
gauges on both sides. The connections are
sealed with screw plugs G
1
/
8
when a pres
-
sure gauge is not installed.
Y
1
Y
2
Fig. 8:
The pressure gauges indicate the signal
pressure at the outputs.
