81
Reference Manual
00809-0100-4809, Rev DA
Section 4: Operation and Maintenance
September 2015
Operation and Maintenance
4. Purge with dry air (less than 5% moisture by weight).
5. Stainless steel purge tubing should have a minimum of
1
/2-in. (12.5 mm) O.D. and at
least 0.035-in. (0.89 mm) wall thickness. Care must be taken to protect the secondary
instrumentation from high pressures and temperatures when purging an Annubar
primary element. Ear protection is also recommended for all personnel in the vicinity of
the system being purged. See figure for sample set-up.
Figure 4-4. Impulse Tube Arrangement for Purge
A. To high side of secondary element
B. To low side of secondary element
C. To external source of fluid pressure
4.6 Main steam line Annubar sensor maintenance
Due to the extreme conditions that the Rosemount
®
585 Main Steam Line Annubar Flowmeters
come into contact with, it should be removed and inspected annually to check for wear.
Emerson Process Management recommends a visual inspection and a Dye Penetrant; examine
to identify any cracks or wear on the Annubar sensor. After the Annubar sensor is inspected, it is
recommended to replace the packing rings to ensure a proper seal. Tab le 4 -1 shows the
replacement part numbers for the packing rings and other spare parts.
Table 4-2. Replacement Part Numbers for the Packing Rings and Other Spare Parts
Packing kits Part number Quantity
Packing Rings – Split 19006-67 2
Packing Rings – Solid Carbon/Graphite 19006-04 3
Packing Gland Stud 16147-07 16
Packing Gland/Support Plate Nuts 16068-06 16
Support Plate Lock Washers 00-101005-01 8
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