Samson TROVIS 3730-3, Mounting And Operating Instructions

Page: 47 / 180

EB 8384-3 EN 47
Mounting and start-up
the bottom when the control valve is in-
stalled to allow any condensed water
that collects to drain off.
5.3.2 Type 3277 Actuator
Î
Required mounting parts and accesso-
ries: Table 3 on page Seite 22.
Î
Observe travel tables on page Seite
26.
Actuators with 175 to 750 cm² effective ar -
eas (see Fig. 7)
Mount the positioner on the yoke. The signal
pressure is routed to the actuator over the
connection block (12), for actuators with fail-
safe action "actuator stem extends" internal-
ly through a hole in the valve yoke and for
"actuator stem retracts" through an external
pipe.
1. 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.
2. Mount cover plate (10) with narrow side
of the cut-out (Fig. 7, on the left) pointing
towards the signal pressure connection.
Make sure that the gasket (14) points to-
wards the actuator yoke.
3. For actuators with 355, 700 or 750 cm²,
remove the follower pin (2) on the M le-
ver (1) on the back of the positioner from
pin position
35 , reposition it in the hole
for pin position 50 and screw tight.
For actuators 175, 240 and 350 cm²
with 15 mm travel, keep the follower pin
(2) in pin position 35 .
Extends Retracts
2
10 14 15
1 2 3 11 11.1
SUPPLY
13
B
C
1.1
1.2
12
12.1
12
12.2
12.1 12 16
16 16
12.2
SUPPLY
View A
View B
View C
SUPPL
Y
G
G 3/8
A
M lever
Cut-out of
cover plate (10)
Actuator stem extends
Actuator stem retracts
Connection
block (old) with
switch plate (13)
Actuator stem
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3 Follower clamp
10 Cover plate
11 Cover
11.1 Vent plug
12 Connection block
12.1 Screw
12.2 Stopper or connection for
external piping
13 Switch plate
14 Gasket
15 Formed seal
16 Gasket
Marking
Fig. 7: Direct attachment – Signal pressure connection for Type 3277 Actuator with 175 to 750 cm²