Vacuum pump

A vacuum pump is a mechanical compressor that operates at less than [atmospheric pressure]?. A vacuum pump can be a positive displacement pump that transports a gas load from an inlet port to and outlet, or exahust, port. Vacuum pumps can also work on a [momentum transfer]? principle, [cryogenic entrapment]? principles as well as the [positive displacment]? principal.

Types of Vacuum Pumps

• Transfer
  • [roots blower]?
  • [rotary compression]?
  • Diffusion pump
  • turbomolecular pump

• [entrapment pump]?
  • [ion pump]?
  • cryopump?