25
Installation, Operation and Maintenance Manual
VCIOM-15792-EN Rev. 0
October 2020
Section 5: Maintenance
Maintenance
Section 5: Maintenance
NOTICE
Before executing any maintenance operation, it is necessary to close the pneumatic supply line
and discharge pressure from the cylinder of the actuator and from the control unit (if foreseen).
!
WARNING
Installation, commissioning and maintenance and repair works should be carried out by
qualified staff.
5.1
Periodic Maintenance
Bettis GVO LP DA actuators are designed to operate long-term in heavy-duty operating
conditions, without maintenance needs.
NOTICE
Periodicity and regularity of inspections is particularly influenced by specific environmental
and working conditions. They can be initially determined experimentally and then be
improved according to actual maintenance conditions and needs.
Anyway every 2 years of operation the following is recommended:
•
Check that the actuator operates the valve correctly and with the required operating
times. If the actuator operation is very infrequent, carry out a few opening and
closing operations with all the existing controls (remote control, local control,
emergency controls, etc.), if this is allowed by the conditions of the plant.
•
Check there are no hydraulic or pneumatic leakages.
•
Check oil level (Figure 19) into the hydraulic manual handpump, if present
(see Section 5.1.1).
•
Check the actuators did not undergo accidental damage with oil leakages found on
site (Section 5.1.1).
•
Check that improper closing of control-group cover did not produce the presence of
condensation on it.
•
Check the integrity of worn out parts (gaskets, pads etc.).
•
Replace, if any, the mechanical filter of the supply gas (refer to Section 5.1.2)
.
