Emerson Process Management 2051 manual Process Connections, Rosemount, Reference Manual

Reference Manual

00809-0200-4101, Rev AA July 2008

Rosemount 2051

Process Connections Coplanar or Traditional Process Connection

Install and tighten all four flange bolts before applying pressure, or process leakage will result. When properly installed, the flange bolts will protrude through the top of the sensor module housing. Do not attempt to loosen or remove the flange bolts while the transmitter is in service.

Flange Adaptors:

Rosemount 2051DP and GP process connections on the transmitter flanges are 1/4–18 NPT. Flange adapters are available with standard 1/2–14 NPT Class 2 connections. The flange adapters allow users to disconnect from the process by removing the flange adapter bolts. Use plant-approved lubricant or sealant when making the process connections. Refer to Dimensional Drawings on page 2-3 for the distance between pressure connections. This distance may be varied ±1/8 in. (3.2 mm) by rotating one or both of the flange adapters.

To install adapters to a Coplanar flange, perform the following procedure:

1.Remove the flange bolts.

2.Leaving the flange in place, move the adapters into position with the o-ring installed.

3.Clamp the adapters and the Coplanar flange to the transmitter sensor module using the larger of the bolts supplied.

4.Tighten the bolts. Refer to “Flange Bolts” on page 2-13 for torque specifications.

Whenever you remove flanges or adapters, visually inspect the PTFE o-rings. Replace with o-ring designed for Rosemount transmitter if there are any signs of damage, such as nicks or cuts. Undamaged o-rings may be reused. If you replace the o-rings, retorque the flange bolts after installation to compensate for cold flow. Refer to the process sensor body reassembly procedure in Section 5: Troubleshooting.

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