2.1.4 Bolting considerations
If the transmitter installation requires assembly of the process flanges,
manifolds, or flange adapters, follow the 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. Figure
2-5 illustrates common transmitter assemblies with the bolt length required
for proper transmitter assembly.
Figure 2-5: Common Transmitter Assemblies
A. Transmitter with coplanar flange
B. Transmitter with coplanar flange and optional flange adapters
C. Transmitter with traditional flange and optional flange adapters
D. Transmitter with coplanar flange and optional manifold and flange
adapters
Bolts are typically carbon steel (CS) or stainless steel (SST). Confirm the
material by viewing the markings on the head of the bolt and referencing
Table 2-1. If bolt material is not shown in Table 2-1, contact a local Emerson
representative for more information.
Use the following bolt installation procedure:
Procedure
1. CS bolts do not require lubrication and the SST bolts are coated with a
lubricant to ease installation. However, no additional lubricant should
be applied when installing either type of bolt.
2. Finger-tighten the bolts.
3. Torque the bolts to the initial torque value using a crossing pattern.
See Table 2-1 for initial torque value.
Quick Start Guide February 2019
8 Emerson.com/Rosemount
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