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2. 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 ...

3. Suction (medicine) - Wikipedia

   en.wikipedia.org/wiki/Suction_(medicine)

   The portable suction unit of an ambulance A dental vacuum system for central suction. In medicine, devices are sometimes necessary to create suction. Suction may be used to clear the airway of blood, saliva, vomit, or other secretions so that a patient may breathe. Suctioning can prevent pulmonary aspiration, which can lead to lung infections.

4. Wilkerson dental chair - Wikipedia

   en.wikipedia.org/wiki/Wilkerson_dental_chair

   Wilkerson dental chair exhibited in the Mohave Museum of History and Arts The Wilkerson dental chair is a hydraulic dental chair , first patented on 20 November 1877, and designed by Basil Manly Wilkerson , known for his dental inventions.

5. Sorption pump - Wikipedia

   en.wikipedia.org/wiki/Sorption_pump

   This problem can be solved by purging the vacuum system with dry pure nitrogen before pump down. In purged system with aspirator rough pumping ultimate pressures of 10 −4 mbar for a single sorption pump and 10 −7 mbar for sequential pumping can be reached. [3] A typical source of dry pure nitrogen would be a liquid nitrogen Dewar head space.

6. Vacuum pump - Wikipedia

   en.wikipedia.org/wiki/Vacuum_pump

   Vacuum pumps are combined with chambers and operational procedures into a wide variety of vacuum systems. Sometimes more than one pump will be used (in series or in parallel) in a single application. A partial vacuum, or rough vacuum, can be created using a positive displacement pump that transports a gas load from an inlet port to an outlet ...

7. Vacuum ejector - Wikipedia

   en.wikipedia.org/wiki/Vacuum_Ejector

   A vacuum ejector, or simply ejector, or aspirator, is a type of vacuum pump, which produces vacuum by means of the Venturi effect.. In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area.