Emerson 3051S Especificaciones descargar pdf (Pagina 112)

102

Reference Manual

00809-0100-4001, Rev JA

Section 5: Troubleshooting

November 2012

Troubleshooting

Table 5-3. Bolt installation torque values

Note

If you replaced the PTFE sensor module o-rings, re-torque the flange bolts after installation to

compensate for cold flow.

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.

5.5.4 Install the drain/vent valve

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 two 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.

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)

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