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12.6 Dismantling the back pull-out assembly 206
12.6.1 When packing is fitted 207
12.6.2 When a mechanical seal is fitted 207
12.6.3 Dismantling the bearing housing 207
12.7 Inspection checks 208
12.7.1 The back cover 208
12.7.2 The frame adapter 208
12.7.3 The bearing housing 208
12.7.4 Lip seals 208
12.7.5 The shaft 208
12.8 Mounting bearings on the shaft 209
12.8.1 Check shaft condition 211
12.9 Assembling the back pull-out assembly 212
12.9.1 A packed stuffing box 212
12.9.1.1 Installing the impeller with a packed
stuffing box 212
12.9.1.2 Packing procedures 213
12.9.2 Installing with a mechanical seal 214
12.9.2.1 Installing the impeller with a
mechanical seal 214
12.10 Installing the back pull-out assembly 215

13 Fluid Properties 217
13.1 Properties of water at various temperatures 217
13.2 Effect of altitude on pressures and the boiling
point of water 218
13.3 Viscous liquids 219
13.3.1 Viscous performance correction for
small pumps 221
13.3.2 Viscous performance correction for
larger pumps 222

14 Friction Loss Tables 225
14.1 Friction loss for water in pipe 225
14.2 Typical resistance coefficients for valves and fittings 234

15 Materials of Construction 237
15.1 Materials of construction for pumping various
liquids 237
15.2 Material selection 248
15.3 Material classes for centrifugal pumps in general
refinery services 249

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