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Installation
5.3 Mounting the device
The activities listed below are necessary to
install the valve and before it can be started
up.
NOTICE
!
Risk of valve damage due to excessively
high or low tightening torques.
Observe the specified torques when tighten-
ing control valve components. Excessive
tightening torques lead to parts wearing out
more quickly. Parts that are too loose may
cause leakage.
Î Observe the specified tightening torques
(u AB 0100).
NOTICE
!
Risk of valve damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON
(u AB 0100).
5-4
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 EB 8312-X.
a) Standard version for
Series 290 Valves, 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 5-3.
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
EB 8074 EN
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