December 2019
89
Installation, Operation and Maintenance Manual
VCIOM-08500-EN
Section 11: Maintenance
Maintenance
•
If the stem is external, check that the valve stem is clean and lubricated. If not,
clean and lubricate it in order to prevent damage to the threaded bush.
•
Check that all nuts and bolts securing the actuator to the valve are tight.
If necessary, re-tighten them with a torque wrench (for tightening torque values
see Section 3.4.3, Installation - Mounting the actuator onto the valve - Actuator
Mounting).
•
For actuators provided with lithium batteries, make sure that the display is still
visible when the power is off and that there is no “Battery low” warning message.
If the "Battery low” warning appears, replace the battery (see Section 11.3 Maintenance
- Lithium battery change). Always replace batteries if the actuator has been subjected to
long periods without power (see Section 12, Troubleshooting).
•
Manual override operation check (if valve operation allows)
•
Check local and remote electrical commands (if valve operation allows)
•
Full Stroke test (FST) or Partial Stroke Test (PST) (if valve operation allows),
torque vs. position diagram report (via A-Manager, if Bluetooth or a serial cable
connection is available)
•
Download .icon file (via A-Manager, if Bluetooth or a serial cable connection is available)
•
Identification of recommended spare parts based on inspection results
•
Identification of next routine inspection date
•
Identification of maintenance needs during next planned plant outage/shut down
•
Final report, including .icon file
•
Repaint all areas where paint is missing. In chemically aggressive or saline
environments, remove rust from surfaces and protect the unit with a rust
preventative.
•
For severe applications or if actuator operation is infrequent, more frequent
maintenance checks are recommended.
11.2
Special Maintenance
In case actuator failure, please refer to Section 12, Troubleshooting for possible causes.
Spare parts can be ordered from Emerson; refer to the individual item number shown in
Section 13, Parts list and drawings.
NOTICE
In cases of actuator failure, refer to Section 12, Troubleshooting for possible causes.
Spare parts can be ordered from Emerson; refer to the individual item number shown in
Section 13, Parts list and drawings.