Emerson Process Management 2051CF manual Bolting Considerations, Common Transmitter Assemblies

Quick Installation Guide

00825-0100-4101, Rev EA June 2010

Rosemount 2051

STEP 1 CONTINUED...

C. 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 illustrates common transmitter assemblies with the bolt length required for proper transmitter assembly.

Figure 1. Common Transmitter Assemblies

A. Transmitter with	C. Transmitter with Traditional		D. Transmitter with
	Flange and Optional Flange		Coplanar Flange and
Coplanar Flange
	Adapters		Optional Manifold and
			Flange Adapters
		4 x 2.25-in. (57 mm)
4 x 1.75-in. (44 mm)
B. Transmitter with Coplanar
Flange and Optional
Flange Adapters
	4 x 1.75-in. (44 mm)	4 x 1.50-in. (38 mm)
			4 x 1.75-in. (44 mm)
4 x 2.88-in. (73 mm)

Bolts are typically carbon steel or stainless steel. Confirm the material by viewing the markings on the head of the bolt and referencing Figure 2. If bolt material is not shown in Figure 2, contact the local Emerson Process Management representative for more information.

Use the following bolt installation 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 Figure 2 for initial torque value.

4.Torque the bolts to the final torque value using the same crossing pattern. See Figure 2 for final torque value.

5.Verify that the flange bolts are protruding through the isolator plate before applying pressure.

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