PNEUMATIC ACTUATORS
ASSEMBLY & MAINTENANCE PROCEDURES
Ref. Doc. MMMACTREGDRE English Rev.2 – January 2012
10
5. PREVENTIVE MAINTENANCE
5.1 This basically consists in a periodic inspection to check the actuator function.
5.2 Actuators must be operated at least once every six months. However, depending on the application of
the actuator, this may be done within shorter periods.
5.3 It is the end user’s responsibility to establish these operation plans depending on the working
conditions.
WARNING !!
Never leave the actuators opened or closed during a long period of time.
5.4 It is recommended to replace O-rings, guides and washers when an in-depth revision of the
installation is made.
6. MAINTENANCE OPERATIONS
6.1 PRECAUTIONS BEFORE DISASSEMBLY!!
6.1.1 Disconnect the actuator and its accessories from the air and electrical network.
6.1.2 Disassembly the solenoid from the actuator.
6.1.3 Disassembly the actuator from the valve and/or from its couplings.
WARNING !!
Always wear adequate protective clothing (Follow the safety guidelines established by
your company!)
Any parts replacement should be done with the original ACTREG spare parts!!
The manufacturer will not be responsible of the wrong functioning of the actuator if
original ACTREG parts have not been used.
7. REASONS FOR PARTS REPAIR AND REPLACEMENT
Parts of the actuator will have to be repaired or replaced as soon as leakage is detected through the
upper O-ring (111) or lower O-ring (110) of the pinion, through the O-ring (109) of the piston or through the O-
rings (118) of the end caps.
As soon as this happens, proceed with the disassembly of the actuator and replacement of all the O-
rings, bushings, slide guides and washers as listed in the spares parts.
8. DISASSEMBLY OF THE ACTUATOR
Once the precautions prior to the disassembly have been taken, follow the next steps:
8.1 Disassembly the end caps (4) of the actuator by un-tightening the external bolts (113).
WARNING !!
With SPRING RETURN ACTUATORS there is no danger during this operation as the
fastening bolts of the caps are designed with adequate length to absorb spring stress.
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