Samson 3222/2780 series Mounting And Operating Instructions - Sembly
EB 5866 EN
33
Decommissioning and disassembly
9 Decommissioning and disas-
sembly
Risk of bursting in pressure equipment.
Control valves and pipelines are pressure
equipment. Improper opening can lead to
bursting of the valve.
−
Before starting any work on the control
valve, depressurize all plant sections con-
cerned and the valve.
−
Drain the process medium from all the
plant sections concerned as well as the
valve.
−
Wear personal protective equipment.
Risk of electric shock.
−
Before performing any work on the device
and before opening the device, disconnect
the power supply and protect it against un-
intentional reconnection.
−
Only use power interruption devices that
are protected against unintentional recon-
nection of the power supply.
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.
burns.
Wear protective clothing and gloves.
Risk of burn injuries due to hot components
and pipeline.
Valve components and the pipeline may be-
come very hot. Risk of burn injuries.
−
Allow components and pipelines to cool
down.
−
Wear protective clothing and gloves.
9.1 Decommissioning
To decommission the control valve for disas-
sembly, 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.
2. Completely drain the pipelines and
valve.
3. Disconnect and lock the pneumatic air
supply or power supply to depressurize
or de-energize the actuator.
4. If necessary, allow the pipeline and valve
components to cool down.
9.2 Removing the valve from
the pipeline
1. Put the control valve out of operation (see
section 9.1).
2. Version with threaded ends (female/
male thread) or flanges: undo the flange
joint or screw connection.
Version with welding ends: cut the pipe-
line in front of the weld seam.
DANGER
!
DANGER
!
WARNING
!
WARNING
!