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42
Reference Manual
00809-0100-4107, Rev BA
Section 3: Hardware Installation
April 2013
Hardware Installation
3.4.2 Impulse piping
Mounting requirements
Impulse piping configurations depend on specific measurement conditions. Refer to Figure 3-8
on page 42 through Figure 3-10 on page 43 for examples of the following mounting configura-
tions:
Liquid measurement

Place taps to the side of the line to prevent sediment deposits on the transmitter’s
process isolators.

Mount the transmitter beside or below the taps so gases can vent into the process line.

Mount drain/vent valve upward to allow gases to vent.
Gas measurement

Place taps in the top or side of the line.

Mount the transmitter beside or above the taps so liquid will drain into the process line.
Steam measurement

Place taps to the side of the line.

Mount the transmitter below the taps to ensure that the impulse piping will stay filled
with condensate.

In steam service above 250 °F (121 °C), fill impulse lines with water to prevent steam
from contacting the transmitter directly and to ensure accurate measurement start-up.
Note
For steam or other elevated temperature services, it is important that temperatures at the
process connection do not exceed the transmitter’s process temperature limits.
Figure 3-8. Liquid applications installation example
A. Coplanar
B. Inline
A
B