Emerson VANESSA 30,000 Series Installation, Operation And Maintenance Manual page 8

VANESSA SERIES 30,000 TRIPLE OFFSET VALVE (TOV)
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
IMPORTANT
Refer to figure 6:
The seal ring is supplied with an index marking (A).
After the complete assembling, verify that the
index marking (A) can be seen in the slot (B) of the
seal retainer flange.
Slot (B) and marking (A) have to be perfectly aligned.
If not visible or not aligned, loosen the retaining
screws, re-align the index marking and start
again the procedure from point 12.
18. If the seal retainer flange screws were secured
by bevels (on the retainer flange near each
screw holes), use peening tool to re-bend the
bevels over each screw and ensure correct
and safe screw locking (refer to figure 7).
FIGURE 6
FIGURE 7
FIGURE 8
4.3 Bottom flange gasket maintenance
If it is necessary to replace the bottom spiral
wound gasket, proceed as follows (see figure 8):
1. Remove the bottom flange (6a).
2. Remove the spiral wound gasket (6c).
3. Inspect and clean the groove of the spiral
wound gasket in the body and in the bottom
flange.
4. Apply a thin film of lubricant on the bottom
spiral wound gasket (6c), then insert it
on the bottom flange (6a), centering and
positioning all on the body bore (lubricant
should be in accordance with Table 3).
Rotate the bottom flange to accommodate
the correct position and center the holes
with the threaded holes on the body.
5. Apply a thin film of lubricant on the threads
of the screws (6b), then introduce and
tighten them using a torque value from
Table 2 (lubricant should be in accordance
with Table 3).
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