Honeywell SMV 3000 User Manual page 114

9.3 Inspecting and Cleaning Barrier Diaphragms,
Procedure, continued
Table 27
102
Inspecting and Cleaning Barrier Diaphragms, Continued
Step
3 Remove O-ring and clean interior of process head using soft bristle
brush and suitable solvent.
4 Inspect barrier diaphragm for any signs of deterioration or corrosion.
Look for possible residue and clean if necessary.
NOTE: If diaphragm is dented, has distorted convolutions or radial
wrinkles, performance may be affected. Contact the
Solutions Support Center for assistance.
Replace O-ring or teflon gasket ring.
5
6 Coat threads on process head bolts with anti-seize compound such
as "Neverseize" or equivalent.
7 Replace process heads and bolts. Finger tighten nuts.
8 Use a torque wrench to gradually tighten nuts to torque of 40 ft-lb (54
N•m) for carbon steel process heads bolts or 35 ft-lb (47.5 N•m) for
stainless steel process head bolts in sequence shown in following
illustration. Tighten head bolts in stages of 1/3 full torque, 2/3 full
torque, and then full torque.
Always tighten head bolts in
sequence shown and in these
stages:
1. 1/3 full torque
2. 2/3 full torque
3. Full torque
Return transmitter to service.
9
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.
SMV 3000 Transmitter User's Manual
Continued
Action
1 3
4 2
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