Page 502 - Boiler_Operators_Handbook,_Second_Edition

Index 487

sub-cooling 148 thermostat 381 pumps 233
suction accumulator 153 thermostatic expansion valves 165 systems 155
suction line 167 thermosyphoning 125 untested pipe 200
sulfite corrosion 255 thermowells 428 upper explosive limit 29
sulfur dioxide 26 third-party inspection 92 UPS (uninterruptible power supply)
summer 393 throttling device 163 211, 212
load 105 throttling the vent valve 253 USTs 232
supercritical boiler plants 22 Tier 4 regulations 139
superheat 82, 148 TIG (GTAW) 220 V
superheated gas 148 tiles 207, 278 vacuum 19, 24
superheated steam 20 timer motor 396 vacuum breakers 20, 254, 305
boiler 271 ton of refrigeration 145 vacuum deaerator 252
superheater 22, 292 topping turbine 359 vacuum pumps 103
vent first 83 top supported boilers 279 vacuum systems 123
surface blowdown 239 total alkalinity 247 value of documentation 5
surface tension 255 total dissolved solids 247 valve manipulation 53
surging 337 tramp air 287 valve packing 210
sweep 207 transformers 215 valve positioner 376, 405
swell 392 transmitter installation 426 valves 304
switching fuels 83 transmitter, mounted 425 blowdown and blowoff 305
synthetic oils 202 trash burners 237 feedwater 305
synthetic replacements 204 traveling grate stokers 322 valve wrench 56
system curves 338 tray type deaerator 253 vanadium 206
trends 14, 375 vapor bound 330
T tribology 203 vaporizer 131, 272
TAB report 193 tri-generation 357 variable frequency drives, fans 350
tack welds 223 trim controller 417 variable inlet vanes 350
tall stack 287 troubleshooting burner manage- variable speed drives 344, 350
tangent 9 ment 34 pumps 344
TDS 247 tubeless boiler 279 VAV boxes 191
teapot 278 tube roller 221 VAV systems 190
temperature control 388 tune-ups 97 velocity pressure 16
switch 388 tuning firing rate controls 211 velocity regain 190
valves 382 turbine pumps 339 vent condenser 252
temperature glide 147 turbining 219 ventilation air 183
temperature limit switches 303 turndown 11, 318 ventilation loads 108
temperature piloted pressure control tuyeres 321 venting of refrigerants 147
valve 234 two element control 393 vents and drains 54
temperatures of casing surfaces 70 TXV 165 venturi throat 312
tensile stress 263 vertical firetube boiler 281
tensile test specimen 263 U viscosity 11, 231
test safeties 68 U bend 268 control 235
test stands 246 UEL 29 visitor’s log 46
test the low water cutoff properly 60 ullage 423 voltage 34
test water temperature 94 ultimate analysis 24, 28, 227 imbalance 216
thermal bulb mounting 166 ultraviolet lights 186 volume 9
thermal shock 136, 431 under-feed stoker 321 VR (valve repair) symbol stamp 91
thermocouple 371 uniform air distribution 313 VSD (Variable Speed Drive) 311, 350
thermo-hydraulic 391 units 7
thermo-mechanical 391 universal solvent 243 W
thermometers read 422 unloading 353 WADITW 13