Decommissioning - Samson EB 31a Mounting And Operating Instructions

10 Decommissioning

The work described in this chapter may only be performed by
specialist personnel qualifi ed to perform the corresponding task.
DANGER
Risk of bursting due to improper opening of pressurised devic-
es and components!
Pneumatic rotary actuators are pressure equipment that can burst
if handled improperly. Projecting, fl ying components and frag-
ments can cause injuries or even death.
Before working on the actuator:
Depressurise the concerned plant parts and the actuator. Also
residual energy must be discharged.
WARNING
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring car-
tridge can lead to serious injuries.
Opening of the rotary actuator only according to the instruc-
tions, see Chapter "11.1 Releasing the spring tension in the
actuator".
Danger of injury due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air es-
capes after it is controlled.
When working near the actuator, wear eye and hearing pro-
tection.
Danger of crushing due to moving actuator- and switching
shaft!
Before working on the actuator, interrupt and lock pneumatic
energy and the control signal.
Vent the actuator.
Do not allow the jamming of objects to hinder the operation
of the actuator- and switching shaft.
If the actuator- and switching shaft are blocked (e.g. due to
"seizure" if not actuated for a long period of time"), release
the residual energy of the actuator (spring tension) before re-
leasing the blockage, see chapter "11.1 Releasing the spring
tension in the actuator".
To decommission the actuator for maintenance and repair work
or for disassembly, perform the following steps:
Decommission the valve, see the corresponding valve docu-
mentation.
Shut off the pneumatic power and lock it, to depressurise the
actuator.
EB 31a_EN
December 2022 edition
Subject to technical changes
Info
− Before any disassembly work is performed, it is important to
make sure that the actuator is not pressurised and the springs
are released in the end position.
− Always proceed with caution and check again that ports 2 and
4 are vented and all accessories or devices have been re-
moved.
− In the case of a single-acting actuator, makes sure prior to dis-
assembly that the actuator is in the start position and the pis-
tons are fully retracted.
Decommissioning
10-1