The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2016
Filed:
Apr. 25, 2008
Method for the pressure regulation of a barrier fluid and a pumping device for a method of this kind
Thomas Felix, Zumikon, CH;
Thomas Felix, Zumikon, CH;
Sulzer Management AG, Winterthur, CH;
Abstract
A method for the pressure regulation of a barrier fluid in a pumping device () is introduced, which includes a pump unit () with a shaft () and a pump housing (), a drive unit (), which is mechanically coupled to the pump unit and a shaft sealing arrangement (), which seals the pump housing () relative to the shaft (). In the method, a pumping medium is pumped by means of the pumping device () and the barrier fluid is conveyed via a feed line () to a common housing (), in which the pump unit () and the drive unit () are arranged, in order to prevent a leakage of the pumping medium out of the pump housing (). Additionally, the pressure of the supplied barrier fluid is increased when a pressure difference between the pressure of the supplied barrier fluid and a detected pressure of the pumping medium in the pump unit () falls below a pre-determined value. For this purpose a pressure reducing valve () for the differential-pressure is opened and the feed line is connected through to a source () for the barrier fluid via the open valve, the pressure of which lies by more than the pre-determined value above the pressure of the pumping medium in the pump unit.