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Emerson Rosemount 3051S MultiVariable - Page 125

Emerson Rosemount 3051S MultiVariable
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Figure 4-14: Alignment Cap Screws
A
A. Alignment cap screw
2. Remove the four bolts and separate the transmitter from the process connection,
but leave the process connection flange in place and ready for re-installation.
Note
If the installation uses a manifold, see Manifold operation.
3. Inspect the SuperModule PTFE O-rings. If the O-rings are undamaged, they may be
reused. Emerson recommends reusing O-rings if possible. If the O-rings show any
signs of damage, such as nicks or cuts, they should be replaced (part number
03151-9042-0001 for glass-filled PTFE and part number 03151-9042-0002 for
graphite-filled PTFE).
Note
If replacing the O-rings, be careful not to scratch or deface the O-ring grooves or the
surface of the isolating diaphragm when removing the damaged O-rings.
4. Install the process flange on the SuperModule process connection. To hold the
process flange in place, install the two alignment cap screws finger tight (these
screws are not pressure retaining). Do not overtighten; this will affect module-to-
flange alignment.
5. Install the appropriate flange bolts.
a) If the installation requires a 1/4–18 NPT connection(s), use four 1.75-in.
flange bolts. Finger tighten the bolts. Go to 5.d.
b) If the installation requires a 1/2–14 NPT connection(s), use flange adapters
and four 2.88-in. process flange/adapter bolts.
c) Hold the flange adapters and adapter O-rings in place while finger-tightening
the bolts.
d) Tighten the bolts to the initial torque value using a crossed pattern. See Table
4-1 for appropriate torque values.
e) Tighten the bolts to the final torque value using a crossed pattern. See Table
4-1 for appropriate torque values. When fully tightened, the bolts should
extend through the top of the module housing.
f) Torque alignment screws to 30 in-lb (3.4 N-m). If the installation uses a
conventional manifold, then install flange adapters on the process end of the
manifold using the 1.75-in. flange bolts supplied with the transmitter.
Reference Manual Operation and Maintenance
00809-0100-4803 October 2018
Emerson.com/Rosemount 125

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