Honeywell SMV 3000 user manual 22519

9.3Inspecting and Cleaning Barrier Diaphragms, Continued

Procedure, continued

Table 27 Inspecting and Cleaning Barrier Diaphragms, Continued

Step

3

4

5

6

7

8

9

Action

Remove O-ring and clean interior of process head using soft bristle brush and suitable solvent.

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.

Coat threads on process head bolts with anti-seize compound such as “Neverseize” or equivalent.

Replace process heads and bolts. Finger tighten nuts.

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 1 3 stages:

1.	1/3 full torque
2.	2/3 full torque	4	2
3.	Full torque

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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.

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