Page 307 -
P. 307
. . . . . . . . . . . Index
piping misalignment 173 in single volute casing 27
piping restrictions 40 radial hydraulic loads 27
piston pumps 159-60 radial thrust 28-9
pitting damage on impeller receipt of a pump on site 165
65-6 recessed impeller vortex pumps
polytetrafluoroethylene (PTFE) 127
13 recirculation pipe diagram 174
positive displacement (PD) recirculation systems 40-1
pumps 159-63 recirculation to suction
power calculation 268 diagram 103
power draw 24 refinery services, material
pressure classes for centrifugal pumps
in flowing system 32,269 249-52
in static system 32 reliability
terminology 16-17 problems 185-6
pressure energy 55 strategy 201
pressure-head relationship resistance coefficient (K factor)
15-18 44-5
pressure-head table 18 restrictions in piping 40
pressurized system 39 reverse flush 102
price considerations 181 rotational speed 84
price evaluation 80-5 rubber lined pump 126
traditional negotiation 81-2 run out 22, 178-9
value based purchasing 82-5
priming 66-8 screw pumps 162-3
p riming tank 148 seal chamber 104-6
progressive cavity pump 128, seal environment 83
163 seal faces, failure modes 197-9
pump capacity 57 seal failure 182
pump discharge head 154 seal flush 101-2
pump hydraulics 15-30 seal quench 102-3
pump limitations 31 seal recirculation diagram 102
pump performance 71 self-priming pumps 66-7,
pump run-out 22, 178-9 148-9
pump selection factors 71-80 series operation 42-3
end user data sheets 73 service water pumps 150-1
mechanical suitability 83-5 shaft, inspection 208
minimum data required 72 shaft alignment 178
operational experience 72-3 methodology 179
see also price evaluation shaft condition check 211
pump speed 57 shaft couplings 175-6
changes in 41-2 shaft deflection 29-30
pumping pressure 17-18 shaft failure modes 192
shaft offset and angularity
radial forces 176-7
in double volute casing 28 shaft sealing 87
'279 m
