8
EB 8048-2/-3 EN
Safety instructions and measures
1.2
Notes on possible personal injury
WARNING
!
Crush hazard arising from moving parts.
The Type 3349-1 or Type 3349-7 Pneumatic Control Valve contains moving parts
(actuator and plug stems), which can injure hands or fingers if inserted into the valve.
Î
Do not insert hands or fingers into the yoke while the valve is in operation.
Î
While working on the control valve, disconnect and lock the pneumatic air supply as
well as the control signal.
Risk of personal injury when the actuator vents.
While the valve is operating, the actuator may vent during closed-loop control or when
the valve opens or closes.
Î
Install the control valve in such a way that the actuator does not vent at eye level.
Î
Use suitable silencers and vent plugs.
Î
Wear eye protection when working in close proximity to the control valve.
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).
Risk of personal injury due to residual process medium in the valve.
While working on the valve, residual process medium can escape and, depending on
its properties, may lead to personal injury, e.g. (chemical) burns.
Î
If possible, drain the process medium from all the plant sections concerned and the
valve.
Î
Wear protective clothing, safety gloves, and eyewear.
