EB AT-RP-4GU EN 10-1
Decomissioning
10 Decomissioning
The work described in this section is only to be performed by
fully trained and qualified personnel.
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.
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°).
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.
Crush hazard arising from moving parts.
The actuator and the valve assembly contains moving parts,
which can injure hands or ngers.
Î Do not touch or insert hands or nger 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.
Risk of actuator damage due to excessively high or low tigh-
tening torques.
Follow the specied 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‘.
DANGER
WARNING
!
WARNING
!
NOTICE
!
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.
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