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  2. Sorption pump - Wikipedia

    en.wikipedia.org/wiki/Sorption_pump

    The sorption pump is a cyclic pump and its cycle has 3 phases: sorption, desorption and regeneration. In the sorption phase the pump is actually used to create a vacuum. . This is achieved by cooling the pump body to low temperatures, typically by immersing it in a Dewar flask filled with liquid nitro

  3. Vacuum cooling - Wikipedia

    en.wikipedia.org/wiki/Vacuum_cooling

    Vacuum cooling is a rapid cooling technique for any porous product that has free water and uses the principle of evaporative cooling.Vacuum cooling is generally used for cooling food products that have a high water content and large porosities, due to its efficacy in losing water from both within and outside the products.

  4. Liquid-ring pump - Wikipedia

    en.wikipedia.org/wiki/Liquid-ring_pump

    Single-stage vacuum pumps typically produce vacuum to 35 torr (mm Hg) or 47 millibars (4.7 kPa), and two-stage pumps can produce vacuum to 25 torr, assuming air is being pumped and the ring-liquid is water at 15 °C (59 °F) or less. Dry air and 15 °C sealant-water temperature is the standard performance basis, which most manufacturers use for ...

  5. Cryopump - Wikipedia

    en.wikipedia.org/wiki/Cryopump

    A cryopump or a "cryogenic pump" is a vacuum pump that traps gases and vapours by condensing them on a cold surface, but are only effective on some gases. The effectiveness depends on the freezing and boiling points of the gas relative to the cryopump's temperature.

  6. Cold trap - Wikipedia

    en.wikipedia.org/wiki/Cold_trap

    Pumps that use oil either as their working fluid (diffusion pumps), or as their lubricant (mechanical rotary pumps), are often the sources of contamination in vacuum systems. Placing a cold trap at the mouth of such a pump greatly lowers the risk that oil vapours will backstream into the cavity. Cold traps can also be used for experiments ...

  7. Vacuum packing - Wikipedia

    en.wikipedia.org/wiki/Vacuum_packing

    External vacuum sealers involve a bag being attached to the vacuum-sealing machine externally. The machine will remove the air and seal the bag, which is all done outside the machine. A heat sealer is often used to seal the pack. Typically these units use a dry piston vacuum pump which is often considered a "maintenance-free" pump.

  8. Diffusion pump - Wikipedia

    en.wikipedia.org/wiki/Diffusion_pump

    An oil diffusion pump is used to achieve higher vacuum (lower pressure) than is possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high-vacuum range, down to 1 × 10 −9 mbar (1 × 10 −7 Pa), diffusion pumps today can produce pressures approaching 1 × 10 −10 mbar (1 × 10 −8 Pa) when properly used with modern fluids and accessories.

  9. Non-evaporable getter - Wikipedia

    en.wikipedia.org/wiki/Non-Evaporable_Getter

    A different type of NEG, which is not coated, is the Tubegetter. The activation of these getters is accomplished mechanically or at a temperature from 550 K. [1] The temperature range is from 0 to 800 K under HV/UHV conditions. The NEG acts as a getter or getter pump that is able to reduce the pressure to less than 10 −12 mbar.