Decommissioning And Disassembly; Decommissioning; Removing The Actuator From The Valve; Construction With Integrated Yoke - Samson Type 3374 Mounting And Operating Instructions

Decommissioning and disassembly

9 Decommissioning and
disassembly
DANGER
!
Risk of electric shock.
Before disconnecting live wires, switch off the
power supply at the actuator and protect it
against unintentional reconnection.
WARNING
!
Risk of personal injury due to residual pro-
cess medium in the valve.
While working on the valve, residual process
medium can escape and, depending on its
properties, may lead to personal injury, e.g.
(chemical) burns.
Wear protective clothing, safety gloves, and
eyewear.
WARNING
!
Risk of burn injuries due to hot or cold com-
ponents and pipeline.
Valve components and the pipeline may be-
come very hot or cold. Risk of burn injuries.
− Allow components and pipelines to cool
down or heat up.
− Wear protective clothing and safety gloves.
34

9.1 Decommissioning

To decommission the electric actuator for
repair work or disassembly, proceed as
follows:
1. Put the control valve out of operation.
See associated valve documentation.
2. Switch off the power supply.
9.2 Removing the actuator
from the valve
9.2.1 Construction with integ-
rated yoke
1. Retract actuator stem as described in sec-
tion 3.3.
2. Undo the stem connector parts between
the plug and actuator stems.
3. Loosen the nut at the yoke.
4. Lift the actuator off the valve.
5. Disconnect the supply and signal lines.
9.2.2 Construction with ring
nut
1. Retract actuator stem as described in sec-
tion 3.3.
2. Undo the stem connector parts between
the plug and actuator stems.
3. Unscrew the ring nut on the valve bon-
net.
4. Lift the actuator off the valve.
5. Disconnect the supply and signal lines.
EB 8331-3 EN