36
EB 8384-1 EN
Attachment to the control valve – Mounting parts and accessories
4.7
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
pressure gauge bracket are available
in stainless steel (order numbers listed
below). The Type 3710 Pneumatic Re-
versing Amplifier is also available in
stainless steel.
Connecting plate
(stainless steel)
G ¼
¼ NPT
1400-7476
1400-7477
Pressure gauge
bracket
(stainless steel)
G ¼
¼ NPT
1402-0265
1400-7108
Table 1 to Table 6 apply for attaching posi-
tioners with stainless steel housings with the
following restrictions:
Direct attachment
All mounting kits from Table 1 and Table 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
yokes)
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. Connect-
ing plate in stainless steel.
4.8
Air purging function for
single-acting actuators
The instrument air leaving from the position-
er is diverted to the actuator spring chamber
to provide corrosion protection inside the ac
-
tuator. 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. 4 on
page 19) at the connection block
and make a pneumatic connection to
the spring chamber on the vented side.
NOTICE
Mounting possibly incorrect
when old powder-paint-coated
aluminum connection blocks are
used.
Mount old powder-paint-coated
aluminum connection blocks as
described in sections on Attach-
ment according to IEC 60534-6
(NAMUR rib or attachment to
rod-type yokes) and Attachment
to rotary actuators.
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