Emerson Rosemount 3051S MultiVariable Reference Manual page 126

Operation and Maintenance
October 2018
6. If the SuperModule PTFE O-rings are replaced, re-torque the flange bolts and
7. Install the drain/vent valve.
4.6.6 SuperModule assembly
About this task
To reorder an upgrade or replacement SuperModule assembly, use the Rosemount
3051SMV
Procedure
1. Remove the housing assembly per
126
Table 4-1: Bolt Installation Torque Values
Bolt material
CS-ASTM-A449 Standard
316 SST—Option L4
ASTM-A-193-B7M—Option
L5
Alloy K-500—Option L6
ASTM-A-453-660—Option
L7
ASTM-A-193-B8M—Option
L8
alignment cap screws after installation to compensate for seating of the PTFE O-
ring.
a) Apply sealing tape to the threads on the seat. Starting at the base of the valve
with the threaded end pointing toward the installer, apply two clockwise
turns of sealing tape.
b) Take care to place the opening on the valve so that process fluid will drain
toward the ground and away from human contact when the valve is opened.
c) Tighten the drain/vent valve to 250 in-lb (28.25 N-m).
d) Tighten the stem to 70 in-lb (8 N-m).
Note
Due to the sensitivity of the Range 1 DP Sensor, extra steps are required to optimize
performance. It is necessary to temperature soak the assembly using the following
procedure.
a. After replacing O-rings on DP Range 1 transmitters and re-installing the
process flange, expose the transmitter to a temperature of 185 °F (85 °C) for
two hours.
b. Re-tighten the flange bolts in a cross pattern.
c. Again, expose the transmitter to a temperature of 185 °F (85 °C) for two
hours before calibration.
Ordering information
including feature board electronics
Initial torque value
300 in-lb (34 N-m)
150 in-lb (17 N-m)
300 in-l (34 N-m)
300 in-lb (34 N-m)
150 in-lb (17 N-m)
150 in-lb (17 N-m)
but replace the housing option code with '00'.
Upgrading or replacing the housing assembly
.
Rosemount 3051S Multivariable Transmitter
Reference Manual
00809-0100-4803
Final torque value
650 in-lb (73 N-m)
300 in-lb (34 N-m)
650 in-lb (73 N-m)
650 in-lb (73 N-m)
300 in-lb (34 N-m)
300 in-lb (34 N-m)