Emerson 3051S Specifications Page 20

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18
Reference Manual
00809-0100-4803, Rev DA
Section 2: Installation
April 2013
Installation
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.
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
transmitter process connection do not exceed the transmitter’s operating limits.
Figure 2-6. Installation examples
2.4.4 Process connections
The 3051S MultiVariable transmitter flange process connection size is
1
/4–18 NPT. Flange
adapters with a
1
/4–18 NPT to
1
/2–14 NPT connection are available with the D2 option. Use a
plant-approved lubricant or sealant when making the process connections. The process
connections on the transmitter flange are on 2
1
/8-inch (54 mm) centers to allow direct
mounting to a three-valve or five-valve manifold. Rotate one or both of the flange adapters to
attain connection centers of 2 inches (51 mm), 2
1
/8 inches (54 mm), or 2
1
/4 inches (57 mm).
Install and tighten all four flange bolts before applying pressure to avoid leakage. When properly
installed, the flange bolts will protrude through the top of the SuperModule Isolator Plate. See
2-7. Do not attempt to loosen or remove the flange bolts while the transmitter is in service.
Figure 2-7. Supermodule isolator plate
GAS SERVICE STEAM SERVICE
FLOW
LIQUID SERVICE
SuperModule Isolator Plate
Bolt
Coplanar Flange
Flange Adapters
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