Installation, Commissioning and Maintenance Manual
52
PM-GP-006 Page: 15/17
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
70. Restore eventual gasket or O-ring (see specific part list) between
spring container and centre body
71. Position centring ring (D1) and slide spring container within the
centre body
D1
Instructions valid only for SINGLE-ACTING ACTUATOR
72. Apply a film of Loctite 243 on bolts (D) and tighten to the
recommended torque, following a cross-bolt tightening
sequence
Lubricate the sliding components of the scotch yoke
mechanism - see par. 18.1 for grease specification.
D
Instructions valid only for DOUBLE-ACTING ACTUATOR
73. Restore eventual gasket or O-ring (see specific part list) between
spring container and centre body
74. Position flange (6)
6
Instructions valid only for DOUBLE-ACTING ACTUATOR
75. Apply a film of Loctite 243 on bolts (7) and tighten bolts and
nuts (4) to the recommended torque, following a cross-bolt
tightening sequence
Lubricate the sliding components of the scotch yoke
mechanism - see par. 18.1 for grease specification.
4
7
16.0 Periodic Maintenance
A4US
US
A4
US A4
US
A4
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