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SERVICE
7
93
SITRANS FX330
www.siemens.com/flow
05/2016 - A5E36751269-AA
7.2 Maintaining the O-rings
Whenever either the display cover
1
or the rear cover
2
of the housing is opened and closed
again, make sure that the O-rings are well greased or being replaced if need be (O-ring 94x2,5-
NBR-70K, ISO 3601-1).
Figure 7-2: Maintaining the O-rings
1
Display cover
2
Rear cover
CAUTION!
Use proper multi-purpose grease covering the full operational temperature range to treat the O-
rings with the following properties:
•
Operational temperature range (-30...+130
°
C / -22...+266
°
F at permanent lubrication)
•
Free from silicone
•
Good adhesive capability
•
Lithium saponified
•
Water resistant
•
Compatible with material of O-ring