35
Installation, Operation and Maintenance Manual
MAN 571_EAC Rev. 1
September 2020
Maintenance
Section 5: 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, from the control unit and from
the accumulator tank (if foreseen).
!
WARNING
Installation, commissioning and maintenance and repair works should be carried out
by qualified staff.
5.1
Periodic Maintenance
GPO 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 properly operates the valve.
•
Check there are no hydraulic or pneumatic leakages.
•
Check oil level (Figure 33).
•
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 filter cartridge of the supply gas.
Figure 33
Level Measuring Stick
