Emerson Rosemount 3051CF DP Quick Start Manual page 6

Quick Start Guide
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
illustrates common transmitter assemblies with the bolt length required for
proper transmitter assembly.
Figure 3. 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 or stainless steel. Confirm the material by
viewing the markings on the head of the bolt and referencing
If bolt material is not shown in
Management representative for more information.
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 Table 1
4. Torque the bolts to the final torque value using the same crossing pattern.
See Table 1
5. Verify the flange bolts are protruding through the isolator plate before
applying pressure.
6
A
B
4 ×
(44 mm)
for initial torque value.
for final torque value.
C
4 × 2.25-in. (57 mm)
1.75-in.
4 × 1.75-in.
(44 mm)
Table 1, contact a local Emerson Process
™
as spare parts. Figure 3
D
4 × 1.75-in. (44 mm)
Table 1 on page
June 2017
7.