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10 Decommissioning
The work described in this chapter may only be performed by
specialist personnel qualifi ed to perform the corresponding task.
WARNING
Danger of burning due to hot or cold components and pipe!
Ball valve components and pipes can become very hot or very
cold during operation and cause burns upon contact.
Let the components and pipes cool down or warm up.
Wear protective garments and protective gloves.
Danger of injury due to pressurised components and escaping
medium!
Do not loosen the screw of the optional test connection while
the ball valve is pressurised.
Danger of crushing due to moving actuator- and control shaft!
Do not reach into the bracket as long as the pneumatic pow-
er is connected to the actuator.
Before working on the ball valve, interrupt and lock pneumat-
ic energy and the control signal.
Vent the actuator.
Do not allow the jamming of objects in the bracket to hinder
the operation of the actuator- and control shaft.
If the actuator- and control 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 the corresponding actuator docu-
mentation.
Prior to disassembly of the actuator, bring the ball valve into
the fail-safe position.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the ball valve, exhaust air can escape, for example from the ac-
tuator.
Wear eye protection and, if necessary, hearing protection
when working near valves.
Danger of injury due to residual medium in the ball valve!
When working on the ball valve, residual medium can escape
and, depending on the medium properties, cause injuries (e.g.
scalding, chemical burns).
Wear protective garments, protective gloves and eye protec-
tion.
Do not loosen the screw of the optional test connection while
the ball valve is pressurised.
Bring the ball valve into the open position so the pressure is
released from the ball.
EB 20a_EN
November 2023 edition
Subject to technical changes
Observe the following points during decommissioning:
To decommission the ball valve for maintenance and repair work
or for disassembly, perform the following steps:
Close the valves upstream and downstream of the ball valve
so that no medium fl ows through the ball valve.
Empty the pipe and ball valve completely.
Shut off the pneumatic power and lock it, to depressurise the
actuator.
Let the pipe and ball valve components cool down or warm
up.
Decommissioning
10-1
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