Page 10 -

:::::::::: ............... - ...... . ....... C o n t e n t s

7.4.1 Cylindrical roller beatings 114
7.4.2 Journal bearings 114
7.5 The total bearing arrangement 115
7.6 Oil lubrication 115
7.6.1 Static oil lubrication 115
7.6.2 Constant level oiler 116
7.6.3 Oil ring lubrication 116
7.6.4 Oil mist lubrication 117
7.7 Grease lubrication 118
7.7.1 Shielded bearings 119
7.8 Bearing life 119
7.9 Lubricant protection 120
7.9.1 Sealed bearings 121
7.9.2 The lip seal 121
7.9.3 The magnetic seals 122
7.9.4 Bearing isolator 122

Special Applications 123
8.1 Slurry pumping 123
8.1.1 Industrial slurries 123
8.1.2 Municipal waste 124
8.1.3 Pipelines and mines 125
8.1.4 Recessed impeller vortex pumps 127
8.1.5 Diaphragm pump 128
8.1.6 Progressive cavity pump 128
8.1.7 Solids and slurries - useful formulae 128
8.1.8 Abrasive wear 129
8.2 Paper stock 131
8.2.1 Air in stock 132
8.2.2 Excessive discharge throttling 133
8.2.3 Filters and additives 133
8.2.4 Paper stock pumps 133
8.2.4.1 Medium density stock pumps 134
8.2.4.2 High density pumps 135
8.2.4.3 The fan pump 135
8.2.5 Determination of pump performance 136
8.2.5.1 Example 1 138
8.2.5.2 Example 2 139

Special Pumps 143
9.1 Sump pumps 143
9.1.1 Vertical sump pump 143

- ...................... .................................. ix !