10-1
EB|LTR|43_EN
May 2023 edition
Subject to technical changes
Decommissioning
10 Decommissioning
The work described in this chapter may only be performed by
specialist personnel qualifi ed to perform the corresponding task.
Risk of bursting due to pressurised devices and components!
Butterfl y valves and pipes are pressure equipment that can burst
if handled improperly. Projecting, fl ying components, fragments
and released pressurised medium can cause injuries or even
death.
Before working on the actuator:
Ö Depressurise the concerned plant parts and actuators. Also
discharge the residual energy.
Ö Empty the medium from the concerned plant parts and
butterfl y valve.
Danger of burning due to hot or cold components and pipe!
The actuator and pipe can become very hot or very cold during
operation and cause burns upon contact.
Ö Let the components and pipes cool down or warm up.
Ö Wear protective garments and protective gloves.
Danger of injury due to pressurised components and escaping
medium!
Ö Pressurised components may not be loosened.
Hearing damage and deafness due to a high sound level!
During operation, medium-related noise emissions may be
generated depending on the plant conditions. In addition, there
may be a short-term high sound pressure level when a pneumatic
actuator or pneumatic attachment is suddenly ventilated without
noise-reducing elements. Both can damage hearing.
Ö Wear hearing protection when working in the vicinity of the
actuator.
Danger of crushing due to moving parts!
The actuator contains moving parts (e.g. shaft and wedge-lock-
washer) that can lead to crushing if reaching into it.
Ö During operation, do not reach into the bracket between the
butterfl y valve and the actuator.
Ö Before working on the actuator, interrupt and lock the
pneumatic energy and the control signal.
Ö Do not allow the jamming of objects in the bracket to hinder
the rotation of the shaft.
Ö If the shaft is blocked, contact SAMSON LEUSCH through the
nearest SAMSON offi ce.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the butterfl y valve, exhaust air can escape, for example from the
actuator.
Ö Wear eye protection when working in the vicinity of the
actuator.
DANGER
WARNING
Danger of injury due to residual medium in the butterfl y valve!
When working on the butterfl y valve, residual medium can
escape and, depending on the medium properties, cause injuries
(e.g. scalding, chemical burns).
Ö If possible, empty the medium from the concerned plant parts
and butterfl y valve.
Ö Wear protective garments, protective gloves and eye
protection.
Danger of injury due to preloaded springs!
Actuators that are equipped with preloaded actuator springs are
under mechanical tension. The marking on the actuator type
plate indicates whether a spring return is available and the fail-
safe position. The marking on the type plates is described in the
instruction manuals for the actuators.
Ö Release the compression from the preloaded springs before
working on the actuator, see the corresponding actuator
documentation.
If the actuator is delivered separately from the butterfl y valve or if
it must be disassembled, the corresponding assembly instructions
must be observed.
To decommission the actuator for maintenance work or for
disassembly, perform the following steps:
Ö Depressurise the pipes and butterfl y valves and remove
residual medium from the pipe.
Ö Shut off the pneumatic energy and lock it, to deenergise and
depressurise the actuator.
Ö Let the pipe and butterfl y valve components cool down or
warm up.
WARNING
NOTE
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