Bolting Considerations; Common Transmitter Assemblies - Emerson Rosemount 3051 Series Quick Start Manual

Quick Start Guide
1.5

Bolting considerations

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.
Figure 1-10
required for proper transmitter assembly.
Figure 1-10: Common Transmitter Assemblies
4 × 1.75-in. (44 mm)
4 × 2.88-in. (73 mm)
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 1-1. If bolt material is not shown in
representative for more information.
Procedure
1. Carbon steel bolts do not require lubrication and the stainless steel
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
8
illustrates common transmitter assemblies with the bolt length
A
B
Table 1-1 for initial torque value.
C
4 × 2.25-in. (57 mm)
4 × 1.75-in.
4 × 1.75-in.
(44 mm)
(44 mm)
Table 1-1, contact a local Emerson
February 2019
D
4 × 1.75-in. (44 mm)
Emerson.com/Rosemount