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10 Decomissioning
The work described in this section is only to be performed by
fully trained and qualified personnel.
!
DANGER
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 com-
ponents can cause serious injury or even death.
Î Before starting any work on the actuator disconnect all
pneumatic / hydraulic / electrical supplies and discharge
the pressure from the actuator.
!
WARNING
Risk of personal injury due to preloaded and compressed
springs.
End caps are under tension due to compressed springs.
Furthermore incorrect spring cartidges disassembly could re-
sult in serious injury.
Î Before starting any work on the actuator disconnect all
pneumatic / hydraulic / electrical supplies and discharge
the pressure from the actuator.
Î Make sure that the actuator is in the closed position (0°).
!
WARNING
Risk of personal injury during actuator air exhaust.
In case of pneumatic version the actuator is operated with air.
As a result, air is exhausted during operation.
Î Wear eye and hearing protection when working near the
actuator.
WARNING
!
Crush hazard arising from moving parts.
The actuator and the valve assembly contains moving parts,
which can injure hands or fingers.
Î Do not touch or insert hands or finger into moving parts.
Î Before starting any work on the actuator disconnect all
pneumatic / hydraulic / electrical supplies and discharge
the pressure from the actuator.
Î Do not impede the movement of the pinion and the pistons
by inserting objects into the actuator.
!
NOTICE
Risk of actuator damage due to excessively high or low tigh-
tening torques.
Follow the specified torques to tighten actuator components
(bolts and nuts). Excessive tightening torques lead to parts we-
aring out quicker. Parts that are not tightened enough may
loosen.
Î Refer to section 15.2 'Tightening torques'.
EB 8325 EN
To decommission the actuator for service work or before re-
moving it from the valve, proceed as follows:
1. Put the valve and its accessories out of operation in a safe
position. Refer to the documentation available from the
valve manufacturer.
2. Disconnect the pneumatic/electrical supply to depressuri-
ze the actuator. In case of spring return actuator, make su-
re the actuator reaches the FAIL position once depressuri-
zed.
Decomissioning
10-1
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