Samson 3730-0 - Attaching Positioners with Stainless Steel Housings; Air Purging Function for Single-Acting Actuators

44 EB 8384-0 EN
Mounting and start-up
Pressure gauge attachment
ThemountingsequenceshowninFig.13re-
mains unchanged. Screw a pressure gauge
bracket onto the connections A
1
and Z.
Pressure gauge
bracket
G¼ 1400-7106
¼NPT 1400-7107
Pressure gauges for supply air Z and output
A
1
aslistedinTable2toTable4.
5.8 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.
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1toTable5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.
5.9 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
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 alumi-
num connection blocks as described in
Attachment according to IEC60534-6
(NAMUR rib or attachment to rod-type
yokes).
Note
NOTICE
!