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oil-sealed rotary pump
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oil-sealed rotary pump

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An oil-sealed rotary pump is a type of vacuum pump used in various industrial applications. It operates by using meshing vanes or screws on revolving shafts to positively push fluids into a discharge pipe. These pumps are capable of operating from atmospheric pressure down to very low pressures, with single-stage pumps reaching as low as 2 x 10-2 torr and two-stage pumps achieving less than 5 x 10-3 torr.12

The ultimate pressure achievable by these pumps is limited by oil leakage and the decomposition of the sealing oil due to friction-generated heat. Typical uses for oil-sealed rotary pumps include food packaging, high-speed centrifuges, and ultraviolet spectrometers. They are also commonly employed as forepumps or roughing pumps for other types of vacuum pumps.2

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3 Britannica Sources
  1. vacuum technology
  2. pump
  3. rotary pump

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