Samson 3372 - Service, Conversion, and Parts; Preparation, Testing, and Reassembly

EB 8313-3 EN 9-1
Service and conversion work
9 Service and conversion work
The work described in this section is only to
be performed by personnel qualied for the
assignment accordingly.
The following documents are also necessary
for servicing the valve:
− uAB0100 for tools, tightening torques
and lubricant
Risk of fatal injury due to the ignition of an
explosive atmosphere.
Incorrect installation, operation or servicing
of the electropneumatic actuator in poten-
tially explosive atmospheres may lead to ig-
nition of the atmosphere and cause death.
Î The following regulations apply to instal-
lation in hazardous areas: EN60079-14
(VDE0165, Part1).
Î Work must only performed by personnel
who has undergone special training or
instructions or who is authorized to work
on explosion-protected devices in haz-
ardous areas.
Risk of bursting due to incorrect opening of
pressurized equipment or components.
Pneumatic actuators are pressure equipment
that may burst when handled incorrectly.
Flying projectile fragments or components
can cause serious injury or even death.
Before working on the actuator:
Î Depressurize all plant sections concerned
and the actuator. Release any stored en-
ergy.
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. These actuators can be identied by
several longer bolts with nuts protruding
from the bottom diaphragm case. Actuators
with considerably preloaded springs are also
labeled correspondingly (see the 'Markings
on the device' section).
Î Only open the actuator following the in-
structions in this document. See 'Reliev-
ing the spring compression in the actua-
tor' in the 'Removal' section.
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,
air is vented during operation.
Î Wear eye and hearing protection when
working near the actuator.
Crush hazard arising from the moving actu-
ator stem.
Î Do not insert hands or nger into the
yoke while the air supply is connected to
the actuator.
DANGER
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DANGER
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WARNING
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WARNING
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WARNING
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WARNING
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WARNING
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