Samson 373 Series User Manual

80 EB 8384-2 EN
Mounting and start-up
5.13 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.
The pneumatic connecting plate and pres-
sure gauge bracket are available in stainless
steel (order numbers listed below). The
Type3710 Pneumatic Reversing Amplier 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7toTable9applyforattachingposi-
tioners with stainless steel housings with the
following restrictions:
Direct attachment
AllmountingkitsfromTable2andTable3
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4canbeused.
Connecting plate in stainless steel.
Attachment to rotary actuators
AllmountingkitsfromTable7canbeused
except for the heavy-duty version. Connect-
ing plate in stainless steel.
5.14 Air purging function for
single-acting actuators
The instrument air leaving the positioner is
diverted to the actuator spring chamber to
provide corrosion protection inside the actu-
ator. Observe the following:
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.7)atthe
black connection block and make a
pneumatic connection to the spring
chamber on the vented side.
Mounting possibly incorrect when old
powder-paint-coated aluminum connec-
tion blocks are used.
Mount old powder-paint-coated
aluminum connection blocks as
described in sectionson Attachment
according to IEC60534-6 (NAMUR rib
or attachment to rod-type yokes) and
Attachment to rotary actuators.
FE: The air purging function is automatically
provided.
Note
NOTICE
!

Samson 373 Series Specifications

General

Brand	Samson
Model	373 Series
Category	Valve Positioners
Language	English