Emerson Process Management 2051CF Rosemount, D. O-ringswith Flange Adapters, Continued, Elastomer

Quick Installation Guide

Rosemount 2051

00825-0100-4101, Rev EA June 2010

STEP 1 CONTINUED...

Figure 2. Torque values for the flange and flange adapter bolts
Bolt Material	Head Markings	Initial Torque Final Torque

Carbon Steel (CS)

Stainless Steel (SST)

316

316 R

	300 in.-lbs.	650 in.-lbs.
B7M
	150 in.-lbs.	300 in.-lbs.

B8M

316

STM SW

316 316

D. O-rings with Flange Adapters

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.

Rosemount 3051S / 3051 / 2051 / 3095

Flange Adapter

O-ring

PTFE Based

Elastomer

Rosemount 1151

Flange Adapter

O-ring

PTFE

Elastomer

Whenever the flanges or adapters are removed, visually inspect the 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 and alignment screws after installation to compensate for seating of the PTFE o-ring.

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