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EB 8222-1 EN
1-5
Safety instructions and measures
WARNING
!
Risk of hearing loss or deafness due to loud noise.
The noise emissions depend on the valve version, plant facilities and process medium.
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Wear hearing protection when working near the valve.
Risk of personal injury due to exhaust air being vented from pneumatically operated
components.
While the valve is operating, air is vented from the actuator, for example, during
closed-loop operation or when the valve opens or closes.
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Install the control valve in such a way that vent holes are not located at eye level and
the actuator does not vent at eye level in the work position.
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Use suitable silencers and vent plugs.
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Wear eye protection when working in close proximity to the control valve.
Crush hazard arising from moving parts.
The valve's segmented ball turns in the valve body which can lead to crush injuries to
hands or fingers if they are inserted into the valve.
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Do not insert hands or fingers into the valve body.
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Before working on the control valve, release any energy (in the actuator) which
causes the valve shaft to move (e.g. also the spring compression).
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Before working on the control valve, disconnect and lock the pneumatic air supply
as well as the control signal.
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Disconnect the supply voltage before performing any work on the control valve.
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Do not impede the rotary motion of the segmented ball by inserting objects into its
path.
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Before attempting to unblock a segmented ball after it has become blocked (e.g. due
to seizing up after remaining in the same position for a long time), release any en-
ergy (in the actuator) which causes the valve shaft to move.
Risk of personal injury due to preloaded springs.
Valves in combination with pneumatic actuators with preloaded springs are under ten-
sion.
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Before starting any work on the actuator, relieve the compression from the preload-
ed springs (see associated actuator documentation).
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