Samson 3278, Перевод оригинальной инструкции

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EB 8321 EN 10-1
Removal
10 Removal
The work described in this section is only to
be performed by personnel appropriately
qualified to carry out such tasks.
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.
Î
Only open the actuator following the
instructions described in section 10.2.
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.
Before removing the valve, make sure the fol-
lowing conditions are met:
− The actuator is put out of operation (see
the 'Decommissioning' section).
10.1 Removing the actuator
from the valve
Î
Mounting and removal of the actuator
according to DIN ISO 5211.
10.2 Relieving the spring
compression in the
actuator
To relieve the compression of the springs in
the actuator, proceed as follows:
1. Unthread and remove the nuts (50) and
bolts (50) (including the washers) on the
diaphragm case (1).
2. Remove the diaphragm case (1) and take
out the diaphragm (20).
3. Slowly unthread the screw (44) on the di-
aphragm plate (19) to gradually relieve
the spring spring compression.
4. Hold the diaphragm plate (19) stationary
until the screw (44) is completely un-
screwed before lifting the diaphragm
plate (19) and centering plate (15) off
the springs.
DANGER !
WARNING !
WARNING ! WARNING !