Page 304 -
P. 304
The Practical Pumping Handbook ~ ............................................... . ......
centrifugal pumps 1-13 discharge pressure 17
applications 2-4 discharge recirculation 23, 63
back cover arrangements 7-8 discharge valves 173-4
characteristic curves 141 dismantling
horizontal 147-8 back pull-out assembly 206-7
impeller 8-11 beating housing 207
open and closed 10-11 techniques 203-4
specific speed 9-10 double diaphragm pump, air
material classes for refinery operated 146-7
services 249-52 double row bearing 112
materials of construction double seals 99-100
12-13 double suction impeller 57
minimum data required for double suction pumps 12, 108
selection 72 hydraulic imbalance in 188
mounting feet 8 double volute casing 5
nonmetallic pumps 13 downtime 85
operating at greatly reduced dynamic seal 89
capacity 133
overview 1-2 economic considerations
performance curve 31 maintenance 202-3
priming tank 67 see also price
pump cases 4-8 efficiency 19-20
C-flange adapter 179-80 electric motor, change for
characteristic pump performance change 25
performance curves 22, 76 end suction pump 107, 110
chemicals 3 undersized shaft in 188-90
closed impeller thrust loads entrained air 132
109-10 environmental controls 100-1
closed loop systems 40, 73 epoxy based grouting 168
column and bowl assembly 151 erosion abrasion 126
component seal 98
composite curve 21-2 face to face angular contact
composite head-capacity curve bearing 112-13
20 failure analysis 186-90
constant level oiler 116 failure modes 190-9
conversion tables and formulae see also troubleshooting
259-71 fan pump 135-6
cylindrical roller bearings 114 fiber-reinforced plastics (FRP)
13
decontamination process 204 filters 133
deepwell turbine pump 150 flow rate 18, 33-4, 37, 41
diaphragm pumps 128,160 head change effect 34, 270
differential head 18 pipe diameter effect 269
differential pressure 17 fluid properties 217-24
diffuser casings 6-7 foundation, cement based
diffuser vanes 6 grouting 167-8
m 276
