Samson 3291, Translation Of Original Instructions

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9-4 EB 8072 EN
Servicing
Inspection and testing Action to be taken in the event of a negative result:
Check the test connection and bellows
seal (if used) for external leakage.
WARNING! Risk of personal injury due
to pressurized components and process
medium being discharged. Do not
loosen the screw of the test connection
while the valve is pressurized.
Put the control valve out of operation (see the
'Decommissioning' section). To repair the bellows seal,
contact our after-sales service (see the 'Repairs' section).
Check the valve's seat leakage. Shut off the section of the pipeline and flush the valve to
remove any dirt and/or deposited foreign particles between
the seat and plug.
Check the valve for external damage
(e.g. corrosion).
Repair any damage immediately. If necessary, put the
control valve out of operation (see the 'Decommissioning'
section).
Check the valve accessories to ensure
they are mounted properly.
Tighten the connections of the valve accessories.
Check to ensure that the actuator and
plug stem move smoothly.
Version with adjustable packing 1) : tighten the packing
correctly (see information under 'Adjusting the packing' in
the 'Installation' section > 'Testing the installed valve').
Unblock a blocked actuator and plug stem.
WARNING! A blocked actuator or plug stem (e.g. due to
seizing up after remaining in the same position for a long
time) can suddenly start to move uncontrollably. Injury to
hands or fingers is possible if they are inserted into the
actuator or valve.
Before trying to unblock the actuator or plug stem,
disconnect and lock the pneumatic air supply as well as the
control signal. Before unblocking the actuator, release any
stored energy in the actuator (e.g. spring compression). See
associated actuator documentation.
If possible, check the valve's fail-safe
position by briefly interrupting the air
supply.
Put the control valve out of operation (see the
'Decommissioning' section). Identify the cause for the
malfunction and rectify it (see the 'Troubleshooting' section).
1)
See the 'Markings on the device' section