MAINTENANCE
Series 620
16/26
Edition 2020-01-08
1003735EB.DOCX
6.2
Maintenance procedures
NOTICE
Damage during service
If valve is closed during service procedure valve may get damaged.
Make sure that PFO is deactivated and valve is in open position before starting service
procedure.
One maintenance procedure is defined for this valve:
•
Replacement of plate seal, bonnet seal and valve cleaning
Required frequency of cleaning and replacement of seals is depending on process
conditions.
For spare parts of plate and bonnet seal refer to chapter: «Spare parts».
To deactivate PFO refer to «External Controller manual».
