12
6.5 Installing other makes of
actuators
Other actuators can be installed only if they have an ISO 5211
actuator connection.
7 Trouble shooting table
The following Table 4 lists malfunctions that might occur after
prolonged use.
Table 3
Trouble shooting
8 TOOLS
In addition to standard tools, the following special tools might be
needed.
•
For removal of the actuator:
- extractor (ID-code table in actuator's IMO)
This tool can be ordered from the manufacturer. Always give the
valve type designation when ordering.
9 ORDERING SPARE PARTS
When ordering spare parts, always include the following information:
•
type code, sales order number, serial number
•
number of the parts list, part number, name of the part and quan-
tity required
This information can be found from the identification plate or
documents.
NOTE:
Neles accepts no responsibility for compatibility of actuators not
installed by Neles.
Symptom
Possible fault
Recommended action
Leakage through a closed
valve
Wrong stop screw adjustment of the actuator
Adjust the stop screw for closed position
Faulty zero setting of the positioner
Adjust the positioner
Damaged seat
Replace seat
Damaged closing member
Replace the closing member
Closing member in a wrong position relative to the actuator
Select the correct keyway in the actuator
Leakage through body joint
Damaged gasket
Replace the gasket
Loose body joint
Tighten the nuts or screws
Irregular valve movements
Actuator or positioner malfunction
Check the operation of the actuator and positioner
Process medium accumulated on the sealing surface
Clean the sealing surfaces
Closing member or seat damaged
Replace the closing member or seat
Crystallizing medium has entered the bearing spaces
Flush the bearing spaces
Gland packing leaking
Gland packing worn or damaged
Replace the gland packing
Loose packing
Tighten the packing nuts
