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P. 308
The Practical Pumping Handbook .....................................................................
shaft slenderness ratio 84-5 suction specific speed 62,271
shaft slenderness ratio chart suction strainer 173
189 sump pumps 143-9
shaft undersize in end suction priming 145-6
pump 188-90 surface pressure 59
shielded bearings 119 system analysis 44-51
shutdown point 39 examples 45-50
single angular contact bearing system controls 40
112 system curve 37-8, 43, 51, 78
single volute casing 4 system design, basic elements
sleeve failure modes 193 35-7
slenderness ratio 30, 84-5,189 system hydraulics 31-51
slurries 3, 128-9 changes in existing system 33
flow requirements 129 system operating considerations
specific gravity 271 73-80
slurry pumping 123-31 system performance 71
soft foot 179
solids 128-9 tandem angular contact beating
solids handling pumps 124-5 112-13
with wear plate 124 tandem type double seal 101
specific gravity 17, 31,128-9 throttling back pump discharge
relationship of concentration valve 182
to 129-30 total dynamic head (TDH) 18
specification total energy output 18
not appropriate 80-1 total head 37, 270
requirements 80 total static head 35-6, 76
split seals 97 troubleshooting 181-99
startup point 38 detailed evaluation 181-2
static head 35-6, 39, 59 excessive power consumption
changes in 38-40 187
static oil lubrication 115 frequency of problem
steam quench 103 occurrence 187-8
stock table 140 need for skill and experience
straight pipe for suction side 181-2
171 operational problems 182
stuffing box speed of problem occurrence
assembly 212 187
sealing 87-106 uncurable conditions 184-5
submergence 68-9 see also failure modes
submersible pump 144-5 turbulence 64
suction conditions 53-69
suction elbows 170-1 undersized shaft in end suction
suction inducer 57 pump 188-90
suction pipeline 65
suction recirculation 23, 63 value based purchasing 82-5
suction source design 172 vapor pressure 53, 59-60
Im 280
