Samson 3310 - Page 48

9-2 EB 8222-1 EN
Service and conversion work
Î Disconnect the supply voltage before
performing any work on the control
valve.
Î Do not impede the rotary motion of the
segmented ball by inserting objects into
its path.
Î Before attempting to unblock a segment-
ed ball after it has become blocked (e.g.
due to seizing up after remaining in the
same position for a long time), release
any energy (in the actuator) which caus-
es the valve shaft to move.
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.
Î Wear eye protection when working in
close proximity to the control valve.
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension.
Î Before starting any work on the actuator,
relieve the compression from the pre-
loaded springs (see associated actuator
documentation).
Risk of personal injury due to residual
process medium in the valve.
While working on the valve, residual me-
dium can ow out of the valve and, depend-
ing on its properties, cause personal injury,
e.g. (chemical) burns.
Î Wear protective clothing, safety gloves
and eye protection.
Risk of valve damage due to excessively
high or low tightening torques.
Observe the specied torques when tighten-
ing control valve components. Excessive
tightening torques lead to parts wearing out
more quickly. Parts that are too loose may
cause leakage.
Î Observe the specied tightening torques
(uAB0100.).
Risk of valve damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON
(uAB0100).
Risk of valve damage due to the use of
unsuitable lubricants.
Î Only use lubricants approved by
SAMSON (uAB0100).
WARNING
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WARNING
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WARNING
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WARNING
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NOTICE
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NOTICE
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NOTICE
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