Patent · US Expired

Centrifuge having a gaseous medium as a control fluid and method of operating

US6648809B1 · kind B1 · utility

5Cited by

5References

9Claims

0Family size

Assignee

Westfalia Separator GmbH · DE

Inventors

Wilfried Mackel · Oelde, DE
Willi Niemerg · Oelde, DE
Thomas Kleimann · Oelde, DE

Key dates

Filing date	Nov 5, 2001
Grant date	Nov 18, 2003
Priority date	—
Expiry date	Nov 5, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB04B1/14
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a centrifuge including a centrifugal drum, a supply pipe, a distributor, a displacement sleeve valve having an opening chamber and a closing chamber, a supply duct, a control gas feed in the distributor and a closing spring biasing the sleeve valve towards a closed condition during a pressure buildup in the opening chamber. The present invention also relates to a method of operating the centrifuge using a control gas to operate the sleeve valve and cleaning of control fluid paths by guiding a flushing fluid or flushing gas through the control fluid paths.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.