Pfeiffer Vacuum A Passion for Perfection

2.4.2 Applications

Dry piston pumps have higher pumping speeds than those offered by diaphragm pumps, and are used where a clean, hydrocarbon-free vacuum is required when operating near ultimate pressure. Eliminating the inlet valve enables lower base pressures to be reached than with diaphragm pumps. Like all true positive-displacement pumps, piston pumps have the same pumping speed for all gases.

Piston pumps are suitable for use as dry backing pumps for turbomolecular pumps. However to prevent enrichment of hydrogen and water vapor in the backing vacuum area of the turbopump, they must be operated with gas ballast if necessary. Piston pumps are particularly well suited for analytical applications and for leak detectors (see also 5.2, Design of a helium leak detector). If the test specimens are directly evacuated by the backing pump for leak detection, they cannot be contaminated with oil vapor when a dry backing pump is used.

Piston pumps are not suitable for pumping corrosive or abrasive media.

Site:
Page functions
  • How would you rate this page?

    Cancel

  • Recommend this page!

    Cancel

  • Social Networks:

Contact

Contact options

Our points of contact are available to you at any time:

Display contact options

E-mail

You can use our contact form to send your request or concern directly to us.

Contact Form

Address
Headquarters postal address

Pfeiffer Vacuum GmbH
Berliner Strasse 43
35614 Asslar
Germany

P.O. Box

Pfeiffer Vacuum GmbH
Postfach 1280
35608 Asslar
Germany

T +49 6441 802-0
F +49 6441 802-1202
info@pfeiffer-vacuum.de

Copyright © 2014 Pfeiffer Vacuum GmbH