Page 266 - Know and Understand Centrifugal Pumps
P. 266
Index
driver shaft alignment, 142 totally enclosed impeller, 71
dry running pump, 220 turbine impeller, 65
dual volute pump, 141 in-flow pipe, 239
installation dimension, 2 12
eccentric pipe reducer, 246 internal re-circulation, 32
efficiency curve, 76,80
elastomer, 189 kinetic energy pump, 51
energy (BHp) curve, 76,81
environment controls, 2 13 L/D factor, 135
equipment alignment sequence, 153 lantern ring, the, 177
erosion, 232 Laws of Similarity, The, 39
ethylene propylene, 206
external flush, 21 5 magnetic drive pump, 62
extrusion, 208 mechanical seals, 180, 184
back-to-back double seal, 196
failure analysis, 227 balanced, 188
family curves, 85 cartridge, 192
flow, 39,46 double seals, 194,218
fluid velocity, 235 face-to-face dual seal, 197
fluorocarbon, 206 single, balanced, external, 187
friction head (Hf), 92 single, balanced, internal, 186
calculating the Hf, 97 single, outside-mounted,
unbalanced, 186
gases, 220 single, unbalanced, inside
gauge pressure (psig), 5 mounted, 185
grout, 148 support systems for dual seals, 198
tandem dual seal, 195
hard vacuum, 221 minimum requirement curve, 76
Hazen and Williams formula, The, misalignment, types of, 144
17,98 motor, the, 148
head, 39
head-flow curve, 76,78 negative psi, 5
heat, 189 net positive suction head (NPSH),
heat exchanger, 218 12, 54,82
high pressure, 189,221 net positive suction head available
high speed shafts, 189 (NPSHa), 13,14
high temperature, 220 net positive suction head required
high temperature pump, 138 (NPSHr), 13,76,82
high velocity shaft speed, 221 nitrile, 206
horsepower, 44 non-lubricating liquids, 220
hot alignment, 147 non-metallic pump, 61
H-Q curve, see head-flow curve
O-ring, 187,214
impeller, 3, 48 split, cracked or hard, 208
conventional impeller, 66 O-ring (the elastomer) failure, 204
impeller diameter, 42 ozone attack, 209
open impeller, 70
overhung impeller, 57 packing lubricant, 178
pump impeller, 64 graphite, 178
semi open impeller, 71 mica. 178
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