9 Appendix I
9.1 Special Packing Arrangement
(High pressure, dual flush packing)
The following information covers the installation, operation and maintenance of the high pressure, dual
flush packing arrangement. This arrangement was developed for high pressure, to minimize product dilu-
tion, and to minimize external packing leakage.
Description
The arrangement consists of (6) rings of packing (106), (2) lantern rings (105), and (1) restrictor bushing
arranged as follows: 3P, 1L, 2P, 1L, 1P, 1RB from the gland face to the bottom of the stuffing box, See
High Pressure Dual Flush Packing Arrangement
figure below.
Figure 27: High Pressure Dual Flush Packing Arrangement
The inner lantern ring uses product flush to minimize product dilution. This flush should be filtered to re-
duce particle size and minimize sleeve / packing wear.
The outer lantern ring is supplied with water and is used as with any other packing arrangement to lubri-
cate and cool the packing as the shaft rotates and generates heat.
9 Appendix I
76
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual