1 How to calculate dp transmitter
steam and water?
2 impulse line for liquid steam and
gas
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Answer Posted / carl_ellis
The DP pressure/flow transmitter is mounted above the pipe
for gas applications (empty impulse tubing).
The DP pressure/flow transmitter is mounted below the pipe
for liquid applications (liquid filled impulse tubing)
Steam flow applications using DP pressure transmitters were
historically mounted below-the-pipe (water filled impulse
tubing, frequently with condensate/seal pots), until
Emerson/Rosemount recently discovered that within certain
temperature limits, a DP transmitter close coupled on a
coplanar manifold to an Annubar averaging pitot tube can
survive steam temperatures mounted above-the-pipe.
See this link for Emerson's white paper on steam service
installation recommendations:
http://www2.emersonprocess.com/siteadmincenter/PM%
20Rosemount%20Documents/00870-0200-4809.pdf
Carl Ellis
Measure First
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