2.8 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 and a
pressure gauge bracket are available in
stainless steel (order number listed below).
The Type 3710 Pneumatic Reversing Ampli
-
fier is also available in stainless steel.
Connecting plate
(stainless steel):
G ¼
¼ NPT
1400-7476
1400-7477
Pressure gauge
bracket (st. steel):
G ¼
¼ NPT
1402-0265
1400-7108
The Tables 1 to 5 (pages 10 and 19) apply
for attaching positioners with stainless steel
housings with the following restrictions:
Direct attachment
All mounting kits from Tables 1 and 2 can
be used. The connection block is not re
-
quired. The stainless steel version of the
pneumatic connecting plate routes the air in
-
ternally to the actuator.
Attachment according to IEC 60534-6
(NAMUR rib or attachment to rod-type yo
-
kes)
All mounting kits from Table 3 can be used.
Connecting plate in stainless steel.
Attachment to rotary actuators
All mounting kits from Table 5 can be used
except for the heavy-duty version. Con
-
necting plate in stainless steel.
2.9 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:
Direct attachment to Type 3277-5 (stem ex
-
tends FA/stem retracts FE)
The air purging function is automatically
provided.
Direct attachment to Type 3277, 175 to
750 cm²
FA: Remove the stopper 12.2 (Fig. 5 on
page 23) at the connection block and
make a pneumatic connection 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 attachment
described below in “Attachment acc. to
IEC 60534-6 (NAMUR rib or
attachment to rod-type yokes) and to
rotary actuators”.
FE: The air purging function is automati
-
cally provided.
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 connected
46 EB 8384-4 EN
Attachment to the control valve – Mounting parts and accessories
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