Emerson Rosemount 3051 CF Series, Справочное руководство

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b. Hold the flange adapters and adapter O-rings in place while installing (in
the desired of the four possible process connection spacing
configurations) using four 2.88-in. bolts to mount securely to the
coplanar flange. For gage pressure configurations, use two 2.88-inch
bolts and two 1.75-in. bolts.
• Manifold: Contact the manifold manufacturer for the appropriate bolts and
procedures.
3. Tighten the bolts to the initial torque value using a crossed pattern.
See Table 6-1 for appropriate torque values.
4. Using the same cross pattern, tighten bolts to final torque values seen in Table 6-1 .
Table 6-1: Bolt Installation Torque Values
Bolt material Initial torque value Final torque value
CS-ASTM-A445 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-19 B7M—Option L5 300 in.-lb (34 N-m) 650 in.-lb (73 N-m)
ASTM-A-193 Class 2, Grade B8M—Option L8 150 in.-lb (17 N-m) 300 in.-lb (34 N-m)
Note
If you replaced the PTFE sensor module O-rings, re-torque the flange bolts after
installation to compensate for cold flow of the O-ring material.
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.
See Safety messages for complete warning information.
6.4.4 Install drain/vent valve
Complete the following steps to reinstall the drain/vent valve in the Rosemount 3051
Transmitter.
Procedure
1. 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.
2. Tighten the drain/vent valve to 250 in.-lb. (28.25 N-m).
3. 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.
Troubleshooting Reference Manual
July 2020 00809-0100-4774
108 Rosemount 3051