Samson 3251-E, Mounting And Operating Instructions

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EB 8052-E EN 5-5
Installation
5.3.1 Mounting the external
anti-rotation fixture
Before mounting the actuator, the external
anti-rotation fixture must be mounted onto
the plug or piston 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
EB 8312-X.
a) Standard version for valve
size NPS 6 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).
5. Position the travel indicator scale (84) on
the hanger (83) with the screws (85) ac-
cording to Table 5-4.
6. Use a soft-faced hammer or lever press
to press the sliding washers (309) with
their beveled part first (without using any
lubricant) into the recesses of the clamps
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 or piston
stem
Fig. 5-1: Overview of yoke assembly with travel indicator scale in the standard version
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.