Samson 4708 - 4 Pneumatic Connections; Pressure Gauge

16 EB 8546 EN
Pneumatic connections
4 Pneumatic connections
The air connections are designed either with
G¼ or ¼-18NPT threads. On compact
supply pressure regulators, an arrow on the
adhesive label indicates the direction from
the supply air input to the output.
In supply pressure regulators with two con-
necting holes in the adapter plate (Fig.5
and Fig.6), the supply air connection is
marked SUPPLY.
The positioner's output signal is routed in
these versions over the OUTPUT port through
the adapter plate to the actuator.
4.1 Pressure gauge
When attaching the pressure gauge, make
sure that a gap of 2 to 3mm remains be-
tween the lock nut (20) and pressure gauge’s
square on tightening the lock nut.
For Types4708-12xx/13xx (compact ver-
sions), additionally make sure that the blank-
ing plug (23) is only screwed in until it is
ush with the body. Otherwise, the gaskets
(21, 22) will be damaged. Each gasket is as-
signed either to the pressure gauge or to the
screw plug and must be changed corre-
spondingly if you change the location of the
pressure gauge and screw plug to the other
side.
20 22
2...3 mm 0 mm
21 23
Fig.9: Mounting the pressure gauge, e.g. Types4708-12xx/-13xx (compact version)