Samson 3595, Монтаж и эксплуатация

Страница: 50 / 76

9-2 EB 8079 EN
Servicing
Î
Before working on the control valve, dis -
connect and lock the pneumatic air sup -
ply as well as the control signal.
Î
Do not impede the movement of the actu -
ator 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), re
-
lease any stored energy in the actuator
(e.g. spring compression). See associat
-
ed actuator documentation.
Risk of personal injury due to exhaust air
being vented.
While the valve is operating, the actuator or
valve accessories may vent during closed-
loop control 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. They can be identified by the long
bolts protruding from the bottom of the actu
-
ator.
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 pro-
cess 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
Wear protective clothing, safety gloves
and eye protection.
Risk of valve damage due to excessively
high or low tightening torques.
Observe the specified torques on tightening
control valve components. Excessively tight
-
ened torques lead to parts wearing out
quicker. Parts that are too loose may cause
leakage.
Î
Observe the specified tightening torques
(see the 'Tightening torques, lubricants
and tools' section in the annex).
Risk of valve damage due to the use of un-
suitable tools.
Î
Only use tools approved by SAMSON
(see the 'Tightening torques, lubricants
and tools' section in the annex).
WARNING ! WARNING !
WARNING !
WARNING ! WARNING !
NOTICE !
NOTICE !