book > index > index V
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Vacon, see ‘Kovar’
Vacustat 376
vacuum 1
vacuum balance 621,626
vacuum feedthroughs, see ‘feedthroughs’
vacuum furnace 633,649
vacuum joints
-, ceramic-to-metal 591
-, demountable 575
-, glass-to-metal 591
-, gluing 592
-, permanent 584
vacuum seals
-, collar flange 577,580,583
-, ConFlat 582
-, double seal 579
-, dynamic 579
-, elastomer 576
-, ferrofluid 597
-, gold wire 581
-, Helicoflex ring 583
-, indium 581
-, ISO-F(lange) system 577,580,583
-, KF system (ISO-KF) 578,580
-, metal 581
-, Pneurop flanges 580,583
-, Wheeler flange 583
vacuum systems, general rules for working with 655
vacuum technique 1
Vacu-vin 160
valve actuation mechanisms
-,spindle with bellows sealing 603
-,spindle with elastomer sealing 603
valve sealing constructions 600
-, ball sealing 601
-, butterfly sealing 601
-, diaphragm sealing 600
-, plate-seat sealing 600
valves 599
-, actuation mechanisms 603
-, angle valve 604
-, ball valve 601,602
-, butterfly valve 602,604
-, gate valve 605
-, inline valve 604
-, poppet valve 604
-, sealing constructions 600
Van der Waals 8
-, forces 8,63,68
-, equation of state 23
vanadium 319
vapour pressure 2,34,625
-, of water vapour 672
vapour pressure curves
-, diffusion pump oils 628
-, elastomer sealing materials 628
-, gases 336
-, various materials 627
vapour-stream pump 163,173,199
-, critical backing pressure 201,208
-, diffuser 200
-, fan out effect 201,207
-, Ho-factor 206
-, Jeackel’s diffusion model 202
-, maximum compression ratio 206
-, maximum pumping speed 205
-, sideward shock waves 201,207
-, ultimate pressure 207
venting a system 676
Vespel 646
viewports, see ‘optical windows’
vinyl fluoride, see ‘Viton’
virtual leak 522
viscosity 40,49,670
-, free-molecule 43
-, in a dense gas 40
-, in a rarefied gas 42
viscosity gauges
-, quartz crystal friction gauge 369,401
-, spinning rotor gauge 4,369,396
viscous flow 101
Viton 580,645,688
volumetric flow rate, see ‘pumping speed’
Von Guericke (Otto) 3
