Samson 3730-2, Mounting And Operating Instructions

Page: 23 / 128

EB 8384-2 EN 23
Attachment to the control valve – Mounting parts and accessories
4.1 Direct attachment
4.1.1
Type 3277-5 Actuator
−
Required mounting parts and accesso-
ries: Table 1 on page 50
−
Observe the travel table on page 21.
Actuator with 120 cm² (see Fig. 3)
Depending on the type of positioner attach-
ment, the signal pressure is routed either left
or right of the yoke through a hole to the ac-
tuator diaphragm. Depending on the fail-
safe action of the actuator "actuator stem ex -
tends" or "actuator stem retracts" (valve clos -
es or opens upon supply air failure), the swi-
tchover plate (9) must first 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.
4. Mount cover plate (10) with narrow side
of the cut-out (Fig. 3, on the left) pointing
towards the signal pressure connection.
9 11
Supply 9 Output 38
5
6
4
7
6
10
10.1
3
2
1
15
6.1
1.1
1.2
14
8
Fig. 3: Direct attachment – Signal pressure connection for Type 3277-5 Actuator with 120 cm²
M lever
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)
included 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 Sealing plug
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
Symbols
Actuator stem
extends
Actuator stem
retracts
Left attachment Right attachment