Samson TROVIS 3731-3, Монтаж и эксплуатация

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4.1 Direct attachment
4.1.1 Type 3277-5 Actuator
Refer to Table 1 on page 30 for required
mounting parts and accessories.
Actuator with 120 cm²
NOTICE
If a solenoid valve or similar is additionally
mounted to the actuator, observe the follow-
ing instructions which differ from the instruc-
tions otherwise described:
– The switchover plate (9) is omitted.
– The signal pressure must be routed from
the signal pressure output over the con-
necting plate (accessories order no.
1400-6820) to the actuator.
– The hole for the signal pressure output
must be fitted with the screw restriction
(accessories order no. 1400-6964/item
no. 0390-1424).
– Do not remove the screw plug (4) at the
back of the positioner.
Depending on the type of positioner attach-
ment, the signal pressure is routed either left
or right of the yoke through a bore to the
actuator diaphragm.
1.
Refer to Fig. 4 to select the symbol to
match the required fail-safe position
and how the positioner is attached:
Fail-safe position:
Actuator stem extends = Fail-close
Actuator stem retracts = Fail-open
Positioner attachment: Left or right with
view looking onto the switchover plate
2. Align the marking of the switchover
plate (9) to the corresponding symbol
and mount the plate on the actuator
yoke.
3. If applicable, mount pressure gauge
bracket (7) with pressure gauges or, in
case G ¼ threaded connections are re-
quired, the connecting plate (6), mak-
ing sure both seal rings (6.1) are
seated properly.
4. Remove screw plug (4) on the back of
the positioner and seal the signal pres-
sure output "Output 38" on the con-
necting plate (6) or on the pressure
gauge bracket (7) with the stopper (5)
included in the accessories.
5. Place follower clamp (3) on the actua-
tor stem, align and screw it tight so that
the mounting screw is located in the
groove of the actuator stem.
6. Press brass restriction (accessories or-
der no. 1400-6964/item no.
0390-1423) into the seal of the signal
pressure input at the actuator yoke.
7. Mount cover plate (10) with the narrow
side of the cut-out opening (Fig. 4, left)
pointing towards the signal pressure
connection. Make sure that the bonded
gasket (14) points towards the actuator
yoke.
8.
15 mm travel:
Keep the follower pin
(2) at lever
M
(1) on the back of the
positioner in the pin position
35
(deliv-
ered state).
7.5 mm travel:
Remove the follower pin
(2) from the pin position
35
, reposition
EB 8387-3 EN
17
Attachment to the control valve – Mounting parts and accessories