Emerson Rosemount 2051 Wireless Series Reference Manual page 57

Section 6: Troubleshooting
June 2012
Table 6-4. Bolt Installation
Bolt Material
CS-ASTM-A445 Standard
ASTM-A-193-B7M—Option
Alloy K-500—Option L6
ASTM-A-453-660—Option
ASTM-A-193-B8M—Option
4.
5.
a.
b. Take care to place the opening on the valve so that process fluid will drain toward the
c.
Note
After replacing o-rings on Range 1 transmitters and re-installing the process flange, expose the
transmitter to a temperature of 185 °F (85 °C) for two hours. Then re-tighten the flange bolts in
a cross pattern, and again expose the transmitter to a temperature of 185 °F (85 °C) for two
hours before calibration.
70
Torque Values
316 SST—Option L4
L5
L7
L8
If you replaced the Teflon sensor module o-rings, re-torque the flange bolts after
installation to compensate for cold flow.
Install the drain/vent valve.
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.
ground and away from human contact when the valve is opened.
Tighten the drain/vent valve to 250 in-lb. (28.25 N-m).
Initial Torque Value Final Torque Value
300 in-lb. (34 N-m)
150 in-lb. (17 N-m)
300 in-lb. (34 N-m)
300 in-lb. (34 N-m)
150 in-lb. (17 N-m)
150 in-lb. (17 N-m)
Reference Manual
00809-0100-4102, Rev AA
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)
Troubleshooting