Fast-Entry Doors

Fast-entry (load lock) doors provide easy, tool-free access to the inside of a vacuum chamber. They are CF flanged, but include an integral Viton®-sealed hinged door. The door can be optionally with or without viewport. They are typically used in load lock chambers, or in other chambers where UHV pressures are not required due to the lack of a copper seal.

Please note that all our doors are designed to be bolted to the flange using metric cap-head bolts, since they have countersunk holes designed for round bolt heads.

When selecting a door size, please bear in mind that the inner diameter needs to be larger than the sample to provide clearance. It is often more convenient to operate with a larger size so that it is possible to fit your hand inside the chamber for sample loading, although some chambers have special sample loading tools which are narrower than a human hand.

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Fast-Entry Doors

Fast-entry (load lock) doors provide easy, tool-free access to the inside of a vacuum chamber. They are CF flanged, but include an integral Viton®-sealed hinged door. The door can be optionally with or without viewport. They are typically used in load lock chambers, or in other chambers where UHV pressures are not required due to the lack of a copper seal.

Please note that all our doors are designed to be bolted to the flange using metric cap-head bolts, since they have countersunk holes designed for round bolt heads.

When selecting a door size, please bear in mind that the inner diameter needs to be larger than the sample to provide clearance. It is often more convenient to operate with a larger size so that it is possible to fit your hand inside the chamber for sample loading, although some chambers have special sample loading tools which are narrower than a human hand.

Key Features


  • Doors available in sizes from DN40CF to DN300CF
  • With or without viewport
  • Viton® sealed door closure
  • Knurled knob to secure the door can be operated without tools
  • Maximum bakeout temperature 130ºC
  • Flange material 304L stainless steel (316LN by special request)
  • Custom versions with CF flange on back of door on request
  • Double sealed version with differential pumping flange available by special request

Fast-Entry Doors

Fast-entry (load lock) doors provide easy, tool-free access to the inside of a vacuum chamber. They are CF flanged, but include an integral Viton®-sealed hinged door. The door can be optionally with or without viewport. They are typically used in load lock chambers, or in other chambers where UHV pressures are not required due to the lack of a copper seal.

Please note that all our doors are designed to be bolted to the flange using metric cap-head bolts, since they have countersunk holes designed for round bolt heads.

When selecting a door size, please bear in mind that the inner diameter needs to be larger than the sample to provide clearance. It is often more convenient to operate with a larger size so that it is possible to fit your hand inside the chamber for sample loading, although some chambers have special sample loading tools which are narrower than a human hand.

Key Features


  • Doors available in sizes from DN40CF to DN300CF
  • With or without viewport
  • Viton® sealed door closure
  • Knurled knob to secure the door can be operated without tools
  • Maximum bakeout temperature 130ºC
  • Flange material 304L stainless steel (316LN by special request)
  • Custom versions with CF flange on back of door on request
  • Double sealed version with differential pumping flange available by special request

Fast entry doors in a range of sizes from DN40CF-DN300CF