Sulzer Pumpen Ag

Sulzer Management Ag

Jussi Ahlroth

Sami Virtanen

Matti Koivikko

Heikki Manninen

Teemu Gasman

Jorma Tapani Lehtonen

Kalle Tiitinen

The present invention relates to a sealing arrangement for attaching a side plate often used with a pump volute of a centrifugal pump and an attachment screw used therewith. A characterizing feature of the sealing arrangement for attaching the side plate of a centrifugal pump, comprising at least a pump volute () and a side plate () with attachment screws () and flanges () of the screws () arranged in communication with the volute () or the cover of the casing, is that an annular seal () is arranged between the screw () and the volute or the cover of the casing.

Sealing arrangement for the attachment of a side plate of a centrifugal pump and an attachment screw used therewith

The present invention relates to a centrifugal pump and an impeller thereof. The present invention especially relates to modifying an impeller of a centrifugal pump in such a way that the pump may be used without a risk of damaging a shaft seal or the like at capacities higher than that at the optimal operating point. A characterizing feature of a centrifugal pump, comprising a pump volute (), a rear wall () of the pump, an impeller () having a shroud () and balancing holes extending through the shroud, the impeller being attached on the pump shaft () and rotating inside the volute (), is that the balancing holes () are arranged through the shroud () in such a way that an opening () of the holes () in the front face of the impeller shroud () is both in the rotational direction and ahead of an opening () located in the rear face of the impeller shroud () and closer to the axis () of the pump than the opening () in the rear face of the impeller shroud ().

Centrifugal pump and an impeller thereof

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Jämsä, Finland

Jussi Ahlroth