Installing Drain/Vent Valve - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107, Rev BA
Table 6-5. Bolt installation torque values
Bolt material
CS-ASTM-A445 Standard
316 SST—Option L4
ASTM-A-19 B7M—Option L5
ASTM-A-193 Class 2, Grade B8M—Option L8
Note
If you replaced the PTFE sensor module o-rings, re-torque the flange bolts after installation to
compensate for cold flow.
Note
For Range 1 transmitters: after replacing o-rings 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.
6.5.4

Installing drain/vent valve

1.
2.
3.
Troubleshooting
Initial torque value
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 five clockwise turns of sealing tape.
Tighten the drain/vent valve seat to 250 in-lb. (28.25 N-m).
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.
300 in-lb. (34 N-m)
150 in-lb. (17 N-m)
300 in-lb. (34 N-m)
150 in.-lb (17 N-m)
Section 6: Troubleshooting
Final torque value
650 in-lb. (73 N-m)
300 in-lb. (34 N-m)
650 in-lb. (73 N-m)
300 in.-lb (34 N-m)
April 2013
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