Samson 3730-0 - Attachment Methods

28 EB 8384-0 EN
Mounting and start-up
5.3 Direct attachment
5.3.1 Type3277-5 Actuator
Î Required mounting parts and accesso-
ries:Table2onpage14.
Î Observetraveltablesonpage17.
Actuator with 120cm² (see Fig.6)
Depending on the type of positioner
attachment, the signal pressure is routed
either left or right of the yoke through a hole
to the actuator diaphragm. Depending on
the fail-safe action of the actuator "actuator
stem extends" or "actuator stem retracts"
(valve closes or opens upon supply air
failure),theswitchoverplate(9)mustrstbe
attached to the actuator yoke. Align the
switchover plate with the corresponding
symbol for left or right attachment according
to the marking (view looking onto the
switchover plate).
1. Mount connecting plate (6) or pressure
gauge bracket (7) with pressure gauges
on the positioner, making sure the two
seals (6.1) are seated properly.
2. Remove screw plug (4) on the back of
the positioner and seal the signal pres-
sure output (38) on the connecting plate
(6) or on the pressure gauge bracket (7)
with the stopper (5) included in the ac-
cessories.
3. Place follower clamp (3) on the actuator
stem, align it and screw tight so that the
mounting screw is located in the groove
of the actuator stem.
911
Supply 9 Output 38
5
6
4
7
6
10
10.1
3
2
1
15
6.1
1.1
1.2
14
8
Symbols
Actuator stem
extends
Actuator stem
retracts
Left attachment Right attachment
Switchoverplate(9)
Marking
Signal pressure
input for left
attachment
Signal pressure
input for right
attachment
Cut-out of
cover plate
NOTICE
!
Only use the connecting plate (6) in-
cluded in the accessories to connect
supply and output.
Never screw threaded parts directly
into housing.
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3 Follower clamp
4 Screw plug
5 Stopper
6 Connecting plate
6.1 Seals
7 Pressure gauge bracket
8 Pressure gauge
mounting kit
9 Switchover plate
(actuator)
10 Cover plate
10.1 Seal
11 Cover
14 Gasket
15 Formed seal
Fig.6: Direct attachment – Signal pressure connection for Type 3277-5 Actuator with 120 cm²
4. Mount cover plate (10) with narrow side
ofthecut-out(Fig.6,ontheleft)pointing
towards the signal pressure connection.
Make sure that the gasket (14) points to-
wards the actuator yoke.
5. 15 mm travel: Keep the follower pin (2)
on the M lever (1) on the back of the po-
sitioner in the pin position 35 (delivered
state).
7.5 mm travel: Remove the follower pin
(2) from the pin position 35, reposition it
in the hole for pin position 25 and screw
tight.
6. Insert formed seal (15) into the groove of
the positioner housing and insert the seal
(10.1) on the back of the housing.
7. Place positioner on the cover plate (10)
in such a manner that the follower pin
(2) rests on the top of the follower clamp
(3). Adjust the lever (1) correspondingly
and open the positioner cover to hold the
positioner shaft in position at the cap or
switch(Fig.18).Thelever(1)mustrest
on the follower clamp with spring force.
Mount the positioner on the cover plate
(10)usingthetwoxingscrews.
The following applies to all types of attach-
ment except for direct attachment to
Type3277-5: the signal pressure output at
the back must be sealed by the screw plug
(4, order no. 0180-1436) and the associat-
ed O-ring (order no. 0520-0412) (delivered
state, parts included in the scope of deliv-
ery).
Note