Samson EB 8075 EN, Mounting And Operating Instructions

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EB 8075 EN 5-11
Installation
5.3.2 Mounting the actuator
onto the valve
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. They can be identified by the long
bolts protruding from the bottom of the actu-
ator.
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Before starting any work on the actuator,
relieve the compression from the pre-
loaded springs (see associated actuator
documentation).
Risk of personal injury due to incorrect re-
moval of the anti-rotation fixture under ten -
sion (valves up to NPS 16/Class 150).
Once the actuator has been mounted on the
valve and the assembly is ready for use, the
clamps (301) of the anti-rotation fixture on
the plug stem are under tension.
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Follow the instructions in this document
during mounting or removal.
Î
Do not loosen the screws (303) of the an-
ti-rotation fixture while the force generat-
ed by the supply air and/or the actuator
springs is transmitted to the actuator stem
and the stem (9).
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First remove the actuator from the valve
or ensure it cannot transmit any forces to
the actuator stem before removing the
anti-rotation fixture on the plug stem.
Depending on the version, SAMSON control
valves are either delivered with the actuator
already mounted on the valve or the valve
and actuator are delivered separately. When
delivered separately, the valve and actuator
must be assembled together on site.
a) Mounting the actuator
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To mount the actuator, proceed as de-
scribed in the associated actuator docu-
mentation.
b) Aligning the travel indicator
scale
After mounting the actuator, the travel indi-
cator scale must be aligned.
Versions up to NPS 16 (Class 150)
The '0' on the travel indicator scale must be
aligned with the tip of the stem connector
clamp (see Fig. 5-6).
Versions in NPS 16 (Class 300 to 900) and
NPS 20 (Class 150 to 900) to 32
(Class 150)
The '0' on the scale must be aligned with the
top of the anti-rotation fixture (180.2) (see
Fig. 5-6).
1. Move the valve to the closed position.
2. Loosen the screws on the travel indicator
scale.
3. Align the travel indicator scale.
4. Fix the travel indicator scale into place
by tightening the screws.
WARNING !
WARNING !