1-6 EB 8015 EN
Safety instructions and measures
WARNING
!
Crush hazard arising from moving parts.
The control valve contains moving parts (actuator and plug stem), 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 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 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 personal injury due to residual process medium in the valve.
While working on the valve, residual medium can ow out of the valve and, depending
on its properties, cause personal injury, e.g. (chemical) burns.
Î If possible, drain the process medium from the plant sections affected and from the
valve.
Î Wear protective clothing, safety gloves, respiratory protection and eye protection.