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PM-CQP-006
Page:2/2
Item:
Actuator (Type B)
Task
:
Cylinder seals replacement- Piston seals
Equipment, Tools, Materials
:
Lifting equipments
Spare parts
Warnings
:
Preliminary Operations
:
Description (follow)
Reassembly
•
Replace sliding ring (12) and O-ring (13)
•
Reinstall cylinder tube (10).
•
Position end flange (8) with O-ring (9).
•
Reinstall screws (7) and tighten according to the
recommended torque, following a “cross bolt
torque tightening” sequence.
•
Install upper stop bolt (4) according distance
measured before.
•
Replace O-ring (11) and install stopper plug (3)
•
Install lock nut (5) with O-ring (6)
•
Screw end cap (1) with O-ring (2)
Final testing
The actuator must be tested before it is assembled on the
valve.
•
Place the actuator in a stable position, e.g. on a
workbench.
•
Connect the pneumatic supply to the actuator and
cycle the actuator several times, in order to check if
it works smoothly and if there are any leakages
through the seals.
•
Check if the painted parts have been damaged
during disassembly and/or reassembly. If necessary,
repaint them in accordance with the applicable
painting specifications.
The actuator is now ready to be assembled on the valve.
