Decommissioning And Removal; Decommissioning; Removing The Actuator From The Valve; Force-Locking Attachment - Samson TROVIS 5724-8 Series Mounting And Operating Instructions

Decommissioning and removal

9 Decommissioning and
removal
DANGER DANGER
! !
Risk of fatal injury due to electric shock.
Î Before performing any work on the
device and before opening the device,
disconnect the supply voltage and protect
it against unintentional reconnection.
Î Only use power interruption devices that
can be protected against unintentional
reconnection of the power supply.
DANGER DANGER
! !
Risk of bursting in control valve compo-
nents due to incorrect opening.
Î Before starting any work on the control
valve, depressurize all plant sections
affected as well as the valve.
Î Drain the process medium from all the
plant sections affected and from the
valve.
Î Wear recommended personal protective
equipment. See associated valve docu-
mentation.

9.1 Decommissioning

To decommission the electric actuator for
maintenance work or disassembly, proceed
as follows:
1. Close the shut-off valves upstream and
downstream of the control valve to stop
the process medium from flowing
through the valve.
36
2. Completely drain the pipelines and
valve.
3. Disconnect and lock the power supply.
4. If necessary, allow the pipeline and valve
components to cool down.
5. Remove the valve from the pipeline. See
associated valve documentation.
9.2 Removing the actuator
from the valve
9.2.1 Force-locking attach-
ment
1. Undo the coupling nut (4) and remove
the actuator from the valve connection.
9.2.2

Form-fit attachment

1. Pull plug stem until it reaches the actua-
tor stem or extend actuator stem using
the handwheel.
2. Unscrew the stem connector clamps (16)
between the actuator stem and the plug
stem.
3. Undo the nut (17) and remove the rod-
type yoke (15) together with the actuator
from the valve.
4. Undo the coupling nut (4) and remove
the actuator from the rod-type yoke (15).
EB 5724-8 EN