Emerson Rosemount 3051CF Series Reference Manual page 69

Reference Manual
00809-0100-4774
O-rings
The two styles of Rosemount flange adapters (Rosemount 1151 and 3051/2051/2024/
3095) each require a unique O-ring. Use only the O-ring designed for the corresponding
flange adapter.
WARNING
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:
A. Flange adapter
B. O-ring
C. PFTE based
D. Elastomer
When compressed, PTFE O-rings tend to cold flow, which aids in their sealing capabilities.
Note
Replace PTFE O-rings if the flange adapter is removed.
Reference Manual
Hardware installation
July 2020
69