Operating instructions

4.8 Attaching positioners with
stainless steel housings
Positioners with stainless steel housings re
-
quire mounting parts that are completely
made of stainless steel or free of aluminum.
Note: The pneumatic connecting plate, pres
-
sure gauge bracket and Type 3710 Pneu
-
matic Reversing Amplifier are available in
stainless steel (see Table 6 for order num
-
bers).
The Tables 2 to 6 (pages 41 to 43) apply for
attaching positioners with stainless steel
housings with the following restrictions:
4
Direct attachment
All mounting kits from Tables 2 and 3
can be used. The connection block is not
required. The stainless steel version of the
pneumatic connecting plate routes the air
internally to the actuator.
4
Attachment according to IEC 60534-6
(NAMUR rib or attachment to rod-type
yokes)
All mounting kits from Table 4 can be
used. Connecting plate in stainless steel.
4
Attachment to rotary actuators
All mounting kits from Table 5 can be
used except for the heavy-duty version.
Connecting plate in stainless steel.
4.9 Air purging function for
single-acting actuators
The exhaust air from the positioner is di
-
verted to the actuator spring chamber to
provide corrosion protection inside the actu
-
ator. The following must be observed:
4
Direct attachment to Type 3277-5 (stem
extends FA/stem retracts FE)
The air purging function is automatically
provided.
4
Direct attachment to Type 3277, 240 to
700 cm
2
FA: Remove the stopper 12.2 (Fig. 5
on page 25) at the connection
block and make a pneumatic con
-
nection to the spring chamber on
the vented side.
NOTICE
The method described does not apply to
old connection blocks in powder-paint-
coated aluminum.
In this case, follow the instructions for at-
tachment described below in “Attach-
ment acc. to IEC 60534-6 (NAMUR rib
or attachment to rod-type yokes) and to
rotary actuators”.
FE: The air purging function is automa
-
tically provided.
4
Attachment acc. to IEC 60534-6
(NAMUR rib or attachment to rod-type
yokes) and to rotary actuators
The positioner requires an additional
port for the exhaust air that can be con
-
nected over piping. An adapter available
as an accessory is used for this purpose.
See Table 6.
40 EB 8384-6 EN
Attachment to the control valve – Mounting parts and accessories