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6/08 ST 3000 Release 300 and SFC Model STS103 User’s Manual 173
9.3 Inspecting and Cleaning Barrier Diaphragms, Continued
Procedure, continued
Table 53 Inspecting and Cleaning Barrier Diaphragms, continued
Step Action
6
Coat threads on process head bolts with anti-seize compound such
as “Neverseize” or equivalent.
7
Replace process head or heads and bolts. Finger tighten nuts.
8
Use a torque wrench to gradually tighten nuts to torque rating shown
in Table 48 in sequence shown in following illustration. Tighten head
bolts in stages of 1/3 full torque, 2/3 full torque, and then full torque.
1
2
4
3
Always tighten head bolts in
sequence shown and in these
stages:
1. 1/3 full torque
2. 2/3 full torque
3. Full torque
9
Return transmitter to service.
CAUTION
Do not exceed the overload rating when placing the
transmitter back into service or during cleaning operations. See
Overpressure ratings in Section 3 of this manual.
Continued on next page