Siemens SITRANS FX330 - Maintaining the O-rings

SERVICE 7
101
SITRANS FX330
www.siemens.com/flow08/2022 - A5E36751269-AG EN
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