Installation, Commissioning and Maintenance Manual
40
PM-GP-006 Page: 3/17
Component: Single-Acting actuator / Double-Acting actuator Task: Pneumatic cylinder and centre body seals replacement
Equipment, Tools, Materials:
Spare seals
Wrench
Lifting tools
Project documentation
Warnings:
Preliminary Operations: Removal from Valve
Instructions valid only for SINGLE-ACTING ACTUATOR
15. Sustain the spring cartridge adequately
16. Unscrew bolts (D) carefully
The spring cartridge module can exert a thrust against
the centre body.
Unscrew bolts (D) gradually, all at the same time to release
the spring energy.
D
17. Remove spring container and centring ring (D1)
18. Remove and replace eventual gasket or O-ring (see specific part
list) between spring container and centre body
D1
Instructions valid only for DOUBLE-ACTING ACTUATOR
19. Unscrew nuts (4) from bolts (7)
4
7
20. Remove flange (6)
21. Remove and replace eventual gasket or O-ring (see specific part
list) between flange and carter
6
16.0 Periodic Maintenance
A4US
US
A4
US A4
US
A4
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