37
Installation, Operation and Maintenance Manual
MAN 564 Rev. 6
June 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 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
ALGA 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
(refer to specific operating diagram, in technical documentation furnished with
actuators).
•
Check there are no hydraulic or pneumatic leakages.
•
Check oil level (Figure 37) into the hydraulic control unit (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).
