Emerson Rosemount 3051S Series Reference Manual page 62

Installation
October 2018
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. PTFE Based
D. Elastomer
Whenever you remove flanges or adapters, visually inspect the PTFE O-rings. Replace them if there are
any signs of damage, such as nicks or cuts. If you replace the O-rings, re-torque the flange bolts after
installation to compensate for cold flow. Refer to the process sensor body reassembly procedure in
"Reassembly procedures" on page
Flange bolts
If the transmitter installation requires assembly of the process flanges, manifolds, or flange adapters,
follow these assembly guidelines to ensure a tight seal for optimal performance characteristics of the
transmitters. Use only bolts supplied with the transmitter or sold by Emerson as spare parts.
on page 49
transmitter assembly.
The Rosemount 3051S can be shipped with a coplanar flange or a traditional flange installed with four
1.75-in. flange bolts. Stainless steel bolts supplied by Emerson are coated with a lubricant to ease
installation. Carbon steel bolts do not require lubrication. No additional lubricant should be applied
when installing either type of bolt. Bolts supplied by Emerson are identified by their head markings:
1.The last digit in the F593_ head marking may be any letter between A and M.
48
Rosemount 3051S/3051/2051/3095
87.
illustrates common transmitter assemblies with the bolt length required for proper
B7M
316 B8M
KM
Carbon Steel (CS)
head markings
660
F593_ (1)
CL A
Stainless Steel (SST)
head markings
Alloy K-500 head
marking
Reference Manual
00809-0100-4801, Rev HA
A
B
C
D
Figure 3-6
Installation