Samson 3246 Mounting And Operating Instructions page 10

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.
Î Wear hearing protection when working near the valve.
Risk of personal injury due to exhaust air being vented.
While the valve is operating, air is vented from the actuator, for example, during
closed-loop operation or when the valve opens or closes.
Î Install the control valve in such a way that vent openings are not located at eye level
and the actuator does not vent at eye level in the work position.
Î Use suitable silencers and vent plugs.
Î Wear eye protection when working in close proximity to the control valve.
Crush hazard arising from moving parts.
The control valve contains moving parts (actuator and plug stem), which can injure
hands or fingers if inserted into the valve.
Î Do not insert hands or finger into the yoke while the air supply is connected to the
actuator.
Î Before working on the control valve, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator and plug stem by inserting objects into
the yoke.
Î Before unblocking the actuator and plug stem after they have become blocked (e.g.
due to seizing up after remaining in the same position for a long time), release any
stored energy in the actuator (e.g. spring compression). See associated actuator
documentation.
Risk of personal injury due to preloaded springs.
Valves in combination with pneumatic actuators with preloaded springs are under ten-
sion. These control valves with SAMSON pneumatic actuators can be identified by the
long bolts protruding from the bottom of the actuator.
Î Before starting any work on the actuator, relieve the compression from the preload-
ed springs (see associated actuator documentation).
1-6 EB 8046 EN