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EB 8065 EN
5-5
Installation
Risk of valve damage due to the use of un-
suitable tools.
Î
Only use tools approved by SAMSON
(
u
5.3.1 Mounting the external
anti-rotation fixture
Before mounting the actuator, the external
anti-rotation fixture must be mounted onto
the plug stem in some cases. The valve must
be closed beforehand.
For SAMSON Type 3271 and Type 3277
Actuators with Type 3273 Hand-operated
Actuator, observe the mounting and operat-
ing instructions of the hand-operated actua-
tor (handwheel) to mount the anti-rotation
fixture
u
a) Standard version for valve
sizes DN 125 and larger
See Fig. 5-1 and Fig. 5-2
1. Insert ball bearings (310) into the recess-
es in the bonnet.
2.
Place the yoke (3) on the bonnet in such
a way that the ball bearings fit into the
recesses of the yoke.
3. Fasten the yoke (3) using the castellated
nut (92).
4. Fasten the hanger (83) and warning la-
bel (255), if applicable, to the yoke us-
ing the screws (82).
NOTICE
!
3
83
82
82
310
310
92
84
85
255
Legend
3
Yoke
82
Screws
83
Hanger
84
Travel indicator scale
85
Screws
92
Castellated nut
255 Warning label
310 Ball bearing
Plug stem
Fig. 5-1:
Overview of yoke assembly with travel indicator scale in the standard version
Table 5-2:
Tightening torques
Screw size
Tightening torque
[Nm]
M12
50
M16
121
13. Check and ensure the following points:
–
There is a nominal gap between 0.5
and 1 mm between the slider disks
and their seating surface on the yoke
on each side (see detailed view Y in
Fig. 5-2).
–
The anti-rotation fixture does not get
stuck on the yoke and can move free-
ly in the direction of travel.
14. Extend the actuator stem again and
mount the stem connector clamps.
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