Installation, Operation and Maintenance Manual
MAN 573 Rev. 8 July 2020
Section 5: Maintenance
NOTICE
Before executing any maintenance operation, it is necessary to close the pneumatic feed line and
discharge pressure from the cylinder of the actuator and from the control unit
(if foreseen) to ensure the safety of maintenance staff.
!
WARNING
Installation, commissioning and maintenance and repair works should be carried out by qualied staff.
5.1 Periodic maintenance
RPS actuators are designed to operate long-term in heavy-duty operating conditions, without
maintenance needs.
NOTICE
Periodicity and regularity of inspections is particularly inuenced by specic 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 openings 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 all the paint-coat of the actuator. If some areas are damaged, repair the paint-coat
according to the applicable specication.
• Check there are no pneumatic leakages If necessary, tighten the nuts of the pipe-ttings.
• Check the integrity of worn out parts (gaskets, pads etc.).
• If there is an air lter on the actuator, bleed the condense water accumulated in the cup by
opening the drain cock. Disassemble the cup periodically and wash it with soap and water;
disassemble the lter: if this is made up of a sintered cartridge, wash it with nitrate solvent
and blow through with air. If the lter is made of cellulose, it must be replaced when clogged.
Maintenance 21
Section 5: Maintenance
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