- upright freezer
- upright unit
- upward condenser
- uranium bar
- urban atmosphere
- useful heat
- unsteady cooling
- unsteady flow
- unsymmetric plot
- up-converter
- up-link
- upsilon
- upper atmosphere
- upsilon particle
- urethane foam
- urethane plastic
- uviol
- v connection
- V drive
- VA
- vacancy
- vacuum bottle
- vacuum cooling
- vacuum decay
- vacuum dehydration
- vacuum drying
- vacuum ejector
- vacuum evaporation
- vacuum freezing
- vacuum holdover
- vacuum impregnation
- vacuum insulation
- vacuum line
- vacuum packaging
- vacuum packing
- vacuum pressure
- vacuum refrigeration
- vacuum relay
- vacuum sealing
- vacuum switchgear
- vacuum system
- vacuum thawing
- vacuum tight
- vacuum trap
- vacuum ultraviolet
- vacuum-insulated
- valence band
- valence electron
- validity
- valley
- valley current
- valley filling
- valley value
- valley voltage
- valve
- valve action
- valve arrester
- valve blocking
- valve guard
- valve guide
- valve hammering
- valve hunting
- valve lag
- valve lift
- valve needle
- valve outlet
- valve reaction
- valve unloading
- valve velocity
- vane attenuator
- vane wheel
- vanishing
- vaporizable coolant
- vaporizable fluid
- vaporization cooling
- vaporization cryostat
- vaporized condition
- vaporized coolant
- vaporized cryogen
- vaporized fluid
- vaporized nitrogen
- vaporizer
- vaporizing refrigerant
- vaporous ammonia
- vaporous refrigerant
- vapour condensation
- vapour discharge
- vapour entropy
- vapour freezing
- vapour header
- vapour outlet
- vapour output
- vapour return
- vapour suction
- variable resistor
- varmeter
- varying temperature
- vapour compressor
- vapour diffusion
- vapour fraction