Emerson Rosemount 2051 Wireless Series, Справочное руководство, Страница: 157 / 250

34
Reference Manual
00809-0100-4100, Rev AA
Section 3: Installation
June 2012
Installation
Mounting Requirements
Refer to Figure 3.4.2 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 line.

Mount drain/vent valve upward to allow gases to vent.
Gas Flow Measurement

Place taps in the top or side of the line.

Mount the transmitter beside or above the taps so 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.
Note
For steam or other elevated temperature services, it is important that temperatures at the
Coplanar process flanges must not exceed 250 °F (121 °C) for transmitters with silicone fill, or
185 °F (85 °C) for inert fill. For vacuum service, these temperature limits are reduced to 220 °F
(104 °C) for silicone fill and 160 °F (71 °C) for inert fill.
3.4.2 Process Connections
3051 Wireless transmitter flange process connection size is 1 /
4
–18 NPT. Flange adapters with
1
/
2
–14 NPT connections are available as the D2 option. Use your 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 sensor module housing. Do not
attempt to loosen or remove the flange bolts while the transmitter is in service.
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 module using the longer
of the bolts supplied.
4. Tighten the bolts. Refer to “Flange Bolts” on page 32 for torque specifications.