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Rotary vane pumps

Here the three pump designs that currently dominate applications to mass spectrometry are considered such pumping systems must handle significant gas loads while producing pressures as low as 10 -10 torr (1 torr = 1.333mbar=133.3Pa). [Pg.329]


Vacuum capacities and operating ranges, table, 344, 355 Ejectors, 344, 357 Integrated systems, 344 Liquid ring pumps, 344 Rotary lobe blowers, 344 Rotary piston pumps, 344 Rotary vane pumps, 344 Vacuum equipment, 343 Applications diagram, 352 ASME Code, 344 Pumps, 382 Steam jets, 357 Vacuum flow,... [Pg.630]

The speed of rotary vane pumps is nearly constant from 1 atm down to 10 - torr (see Fig. 1.7). To obtain higher speeds in the 10 2—10-3 torr range, booster pumps are used in series with rotary vane pumps. [Pg.29]

Fig. 1.7. Typical pumping speed vs. inlet pressure of a two-stage rotary vane pump. Fig. 1.7. Typical pumping speed vs. inlet pressure of a two-stage rotary vane pump.
A system of cascaded booster pumps has the characteristics of a medium-size rotary vane pump but does not present the drawback of the back-streaming. For this reason, it finds application in cryogenics, for example, for the circulation of the He mixture in dilution refrigerators. [Pg.30]

Rotary style valves, 20 685 Rotary tackmeters, 14 316 Rotary tumble dryers, 18 732 Rotary vane pumps, 21 71 Rotating anode X-ray tube, 26 413 Rotating arc reactor, 1 211-213 Rotating biological contactor defined, 3 759t... [Pg.811]

Example The vacuum system of non-benchtop mass spectrometers consists of one to three rotary vane pumps and two or three turbo pumps. Rotary vane pumps are used for the inlet system(s) and as backing pumps for the turbo pumps. One turbo pump is mounted to the ion source housing, another one or two are operated at the analyzer. Thereby, a differentially pumped system is provided where local changes in pressure, e.g., from reagent gas in Cl or collision gas in CID, do not have a noteworthy effect on the whole vacuum chamber. [Pg.181]

Fig. 11.2. Schematic of a thermospray interface. A cartridge heater B copper block brazed to stainless steel capillary C capillary D copper tube E ion lenses E quadrupole mass analyzer G line to rotary vane pump H ion exit aperture J source heater. Reproduced from Ref. [30] by permission. American Chemical Society, 1983. Fig. 11.2. Schematic of a thermospray interface. A cartridge heater B copper block brazed to stainless steel capillary C capillary D copper tube E ion lenses E quadrupole mass analyzer G line to rotary vane pump H ion exit aperture J source heater. Reproduced from Ref. [30] by permission. American Chemical Society, 1983.
Important note Particularly in rough vacuum technology, partial pressure in a mix of gas and vapor is often understood to be the sum of the partial pressures for all the non-condensable components present in the mix - in case of the partial ultimate pressure at a rotary vane pump, for example. [Pg.9]

Fig. 2.4 Arrangement of the seating passage in rotary vane pumps atso known as duo seat ... Fig. 2.4 Arrangement of the seating passage in rotary vane pumps atso known as duo seat ...
Rotary vane pumps (see also Figs. 2.5 and 2.6) consist of a cylindrical housing (pump-ing ring) (1) in which an eccentrically suspended and slotted rotor (2) turns in the direction of the arrow. The rotor has vanes (16) w/hich are forced outwards usually by centrifugal force but also by springs so that... [Pg.21]

Fig. 2.5 Cross section of a singie-stage rotary vane pump (TRIVAC A)... Fig. 2.5 Cross section of a singie-stage rotary vane pump (TRIVAC A)...
Fig. 2.13 Working process within a rotary vane pump with gas baiiast... Fig. 2.13 Working process within a rotary vane pump with gas baiiast...
Shown schematically in Fig. 2.14 is the pumping process with and without gas ballast as it takes place in a rotary vane pump when pumping condensable vapors. [Pg.25]

Fig. 2.14 Diagram of pumping process in a rotary vane pump without (teft) and with (right) gas battast device when pumping condensabie substances. Fig. 2.14 Diagram of pumping process in a rotary vane pump without (teft) and with (right) gas battast device when pumping condensabie substances.
With a rotary vane pump w/ith an external oil mist filter in series, a mixture of water vapor and air is being pumped. The following values are used for applying eq. (2.1) ... [Pg.26]

Instead of rotary pumps, large water jet, steam ejector, or water ring pumps can be used. For batch evacuation, and the production of hydrocarbon-free fore vacuum for sputter-ion pumps, adsorption pumps (see Section 2.1.8.1) are suitable. If the use of oil-sealed rotary vane pumps cannot be avoided, basically two-stage rotary vane pumps should be used. The small amount of oil vapor that backstreams out of the Inlet ports of these pumps can be almost completely removed by a sorption trap (see Section 2.1.4) Inserted In the pumping line. [Pg.65]

For the pumping of large quantities of gas in this pressure region, vapor ejector pumps are by far the most suitable. With mercury vapor ejector pumps, completely oil-free vacua can be produced. As a precaution, the insertion of a cold trap chilled with liquid nitrogen is recommended so that the harmful mercury vapor does not enter the vessel. With the medium vacuum sorption traps described under a), it is possible with two-stage rotary vane pumps to produce almost oil-free vacua down to below 10" mbar. [Pg.65]

Serial leaks this is the teak at the end of several spaces connected in series , e.g. a leak in the oil-filled section of the oil pan in a rotary vane pump... [Pg.110]

Sgj = effective pumping speed at the rotary vane pump at the... [Pg.120]


See other pages where Rotary vane pumps is mentioned: [Pg.296]    [Pg.378]    [Pg.344]    [Pg.344]    [Pg.27]    [Pg.283]    [Pg.216]    [Pg.121]    [Pg.180]    [Pg.181]    [Pg.444]    [Pg.20]    [Pg.20]    [Pg.21]    [Pg.22]    [Pg.23]    [Pg.24]    [Pg.38]    [Pg.38]    [Pg.69]    [Pg.96]    [Pg.99]    [Pg.117]    [Pg.120]    [Pg.120]   
See also in sourсe #XX -- [ Pg.21 ]

See also in sourсe #XX -- [ Pg.57 ]

See also in sourсe #XX -- [ Pg.346 ]

See also in sourсe #XX -- [ Pg.71 , Pg.71 ]

See also in sourсe #XX -- [ Pg.83 ]

See also in sourсe #XX -- [ Pg.83 ]




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