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Reference Manual
00809-0200-4101, Rev AA
July 2008
Rosemount 2051
2-18
O-rings:
The two styles of Rosemount flange adapters (Rosemount 1151 and
Rosemount 3051/2051/2024/3095) each require a unique O-ring (see Figure
2-9). Use only the O-ring designed for the corresponding flange adaptor.
Figure 2-9. O-Rings.
When compressed, PTFE O-rings tend to “cold flow,” which aids in their
sealing capabilities.
NOTE
PTFE O-rings should be replaced if the flange adapter is removed.
Failure to install proper flange adapter O-rings may cause process leaks, which can result in
death or serious injury. The two flange adapters are distinguished by unique O-ring grooves.
Only use the O-ring that is designed for its specific flange adapter, as shown below.
ROSEMOUNT 3051S / 3051 / 2051 / 3001 / 3095 / 2024
ROSEMOUNT 1151
Flange
Adapter
O-ring
Flange Adapter
O-ring
PTFE Based
Elastomer
PTFE
Elastomer