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Cryo Pumps

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C.V.E | Cryo Pumps

A cryopump or a "cryogenic pump" is a vacuum pump that traps gases and vapours by condensing them on a cold surface. They are only effective on some gases, depending on the freezing and boiling points of the gas relative to the cryopump's temperature. They are sometimes used to block particular contaminants, for example in front of a diffusion pump to trap backstreaming oil, or in front of a McLeod gauge to keep out water. In this function, they are called a cryotrap or cold trap, even though the physical mechanism is the same as for a cryopump. Cryotrapping can also refer to a somewhat different effect, where molecules will increase their residence time on a cold surface without actually freezing. There is a delay between the molecule impinging on the surface and rebounding from it.



    Cryo Pumps | Our Services

    All cryo pumps go though a stringent procedure taking care of the following:-

  • External photographs are taken prior to overhaul and any abnormalities are reported immediately
  • Servicing and Testing accessories
  • Photographs are taken during disassembly and are stored on our servers. Pictures are used to understand the condition of components on arrival and condition after servicing
  • 80K arrays stripped and re-coated using our in-house plating shop (follow link) here we can add pictures on pre-condition of parts and after coating
  • Radiation shields stripped, re-coated and repainted (Pictures will be provided)
  • Arrays stripped, cleaned and recoated and new carbon installed
  • Displacers stripped, cleaned and reassembled. Where necessary we will provide new displacers manufactured by CVE (New quote submitted)
  • Displacer cylinder re-honed and RA tested
  • Motor assembly stripped and serviced using new bearings and seals.
  • Yoke and valve assembly cleaned and new seals, housing installed.
  • All components undergo thorough cleaning and vacuum bake prior to assembly
  • Helium pressure test both positive and under vacuum.
  • Soak test ensuring seals are bedded in and achieving optimum temperatures and base pressure
  • RGA scan carried out during final hours of testing ensuring CVE cleanliness during assembly

    Cryo Pumps | Manufacturers C.V.E are capable of overhauling:-

  • Brooks (CTI)
  • Oerlikon Leybold
  • Varian
  • Ebara
  • Oxford Instruments
  • Sumitomo
    • Additional Services Available;

    • Brooks (CTI)
    • C.V.E are capable of replacing diode assemblies using diodes calibrated by the A.M.T group.
    • NEW displacers for all the Brooks range of CT and OB pumps.
    • OB board repairs
    • Vacuum gauge head replacement and calibration
    • Onboard data recovery reporting issues during operation

    • Although your pump type is not listed we can investigate all makes of cryogenic pumps and provide you with a quality service, call and enquire or send us an email through to


We specialize in the repair of vacuum pumps for primary and ultra-high vacuum. Most manufacturers’ models are catered for in the Lincoln service centre. Even if the model is not listed, our team of experts will provide support and advise on the best course of action to get you back online.

Opening a vacuum specialized company alongside Applied Materials Technology Limited (AMT) provides unparalleled avenues in material sciences. AMT labs are capable of analysing a full range of liquids, gases and solid materials, enabling CVE to understand conditions of use and reasons for failures, and therefore provide alternatives in order to make the products more robust and fit for purpose.

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Units 5-7 Lyndon Business Park, Farrier Road, Lincoln, LN6 3RU, UK.

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+44 1522 500 050