Table 4-1: Bolt Installation Torque Values
Bolt material Initial torque value Final torque value
CS-ASTM-A449 Standard 300 in-lb (34 N-m) 650 in-lb (73 N-m)
316 SST—Option L4 150 in-lb (17 N-m) 300 in-lb (34 N-m)
ASTM-A-193-B7M—Option
L5
300 in-l (34 N-m) 650 in-lb (73 N-m)
Alloy K-500—Option L6 300 in-lb (34 N-m) 650 in-lb (73 N-m)
ASTM-A-453-660—Option
L7
150 in-lb (17 N-m) 300 in-lb (34 N-m)
ASTM-A-193-B8M—Option
L8
150 in-lb (17 N-m) 300 in-lb (34 N-m)
6. If the SuperModule PTFE O-rings are replaced, re-torque the flange bolts and
alignment cap screws after installation to compensate for seating of the PTFE O-
ring.
7. Install the drain/vent valve.
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.
4.6.6
SuperModule assembly
About this task
To reorder an upgrade or replacement SuperModule assembly, use the Rosemount
3051SMV Ordering information but replace the housing option code with ‘00’.
Procedure
1. Remove the housing assembly per Upgrading or replacing the housing assembly
including feature board electronics .
Operation and Maintenance Reference Manual
October 2018 00809-0100-4803
126 Rosemount 3051S Multivariable Transmitter
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