Mounting Configurations - Emerson Rosemount 2151N Reference Manual

Rosemount 2151N
Mounting Configuration
7
Refer to Figure 2-1 for examples of the following mounting
configurations:
Liquid Flow Measurement
Place taps to the side of the line to prevent sediment
•
deposits on the process isolators.
• Mount the transmitter beside or below the taps so
gases vent into the process lines.
Gas Flow Measurement
Place taps in the top or side of the line.
•
• Mount the transmitter beside or above the taps to
drain liquid into the process line.
Steam Flow Measurement
• Place taps to the side of the line.
Mount the transmitter below the taps to ensure that
•
impulse piping will remain filled with condensate.
• Fill impulse lines with water to prevent steam from
contacting the transmitter directly and to ensure
accurate measurement start-up. Condensate
chambers are not typically necessary since the
volumetric displacement of the transmitter is
negligible.
NOTE
For steam service, do not blow down impulse piping through
the transmitter. Flush the lines with the transmitter isolated
and refill the lines with water before resuming measurement.
NOTE
The mounting configurations described above and depicted in
Figure 2-1 are based on general industry "best practice"
recommendations. Where applicable, specific plant approved
installation practices should be used.
NOTE
In steam or other elevated temperature services, it is
important that temperatures at the process flanges not exceed
250°F (121°C). In vacuum service, these limits are reduced to
220°F (104°C).
Reference Manual
00809-0000-4851 Rev AD
December 2023
Installation