3
Pneumatic connections
The pneumatic connections are designed ei-
ther as G ¼ or ¼ NPT-18 threads. On com-
pact 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 (Figs. 5
and 6, top), the supply air connection is
marked
SUPPLY
. The positioner's output sig-
nal is routed in these versions over the
OUTPUT port through the adapter plate to
the actuator.
3.1 Pressure gauge
Mount the pressure gauge in such a way
that there is a 2-3 mm gap between the lock
nut and pressure gauge's square end after
tightening the lock nut (20).
In the compact versions (Type 4708-12xx/
-13xx), make sure additionally that the
stopper (23) is only screwed in to the point
where it becomes aligned with the housing,
otherwise the gaskets (21, 22) will be dam-
aged. Each gasket is assigned either to the
pressure gauge or to the stopper and must
be changed correspondingly if you change
the location of the pressure gauge and
stopper to the other side.
14
EB 8546 EN
Pneumatic connections
20
22
2...3 mm
0 mm
21
23
Fig. 9 · Pressure gauge attachment, e.g. with Type 4708-12xx/13xx Supply Pressure Regulators
Summary of Contents for 4708-1152
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