1-6 EB 5866 EN
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Crush hazard arising from moving parts.
The pneumatic control valve (Type3222/2780) contains moving parts (actuator and
plug stems), which can injure hands or ngers if inserted into the valve.
Î Do not insert hands or nger 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 in-
to 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.
Pneumatic control valves (Type3222/2780) using an actuator with preloaded springs
are under tension. These control valves with SAMSON pneumatic actuators can be
identied 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).
Risk of hearing loss or deafness due to loud noise.
The noise emissions depend on the valve version, plant facilities and process medium.
Î If necessary, wear hearing protection when working near the valve.
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